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C
"Overall, no issues with the work performed. The person was on time, professional, courteous and knowledgable. The only problem was the price. I had already paid" for the basic package to do a diagnostic, he said the thermostat was not controlling the AC properly, and then swapped it out with another one I had. To do this, he charged me $225, which I thought was excessive, since I'd already paid for the diagnostic separately and I provided the replacement thermostat.

-ARINDAM B.

A
"I have had
since I first moved into my older 1920's home 25 years ago. I had them replace the oil burner in 1992 and now wished I had" put in a gas burner /furnace then. The home has plaster walls and is not amenable to a duct heat system and the house is big. I was worried about the environmental impact of my in ground oil tank going forward and especially if/when I came time to sell my home.
has always been great with service calls and I have their guardian contract. I dealt with
H and he was fabulous from start to finish. I thought their price was a little high looking at Angie List comparable reviews but I knew they would do a good job. The job went well and gas line was not an issue. Decommission went well with fortunately non detect soil samples so tank did not have to be dug up. New system is so much quieter and so much more efficient. My gas bill is a fourth of my oil bills. House heats quicker and furnace so much quieter. I even got an energy rebate and
did all the paper work for me. They may be a little bit more but I would recommend
H and his crew. The oil tank decommission was an additional 3,000$ on top of the 11,000.

-Grant L.

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Local Articles in Rockville

Hiring an HVAC service

The awkward-to-pronounce acronym stands for "heating, ventilation and air conditioning" which in many respects are completely different processes.

AIDGkAau1Ng

HVAC Maintenance

You can help your heating and cooling systems work more efficiently and last longer by tending to regular maintenance. Some things, like changing the furnace filter, can easily be done by the homeowner.

Power companies work to keep electricity on for D.C.-area residents this winter as energy demand skyrockets. (Photo courtesy of FEMA)
Electrical, Heating & A/C, Heating Oil

Power consumption soars during D.C.'s frosty February

Staying warm during the cold snap has become difficult for apartments buildings that have been left without heat. (Photo by Brandon Smith)
Heating & A/C, Heating Oil

Fixing your home's heating system can be complex task

Because a ceiling fan doesn’t actually cool a room, you can turn off the fan when you leave the room and save on your electric bill. (Photo courtesy of Angie's List member Marvin Y. of Albany, New York)
Heating & A/C

Learning the real story behind some of those common air conditioning assumptions can help you to keep your system operating more efficiently.

 (Photo by Photo by Brandon Smith)
Heating & A/C

Learn more about the different efficiency ratings for HVAC equipment and how they impact the performance of your air conditioner, heat pump or furnace.

Angie's Answers

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No one can tell you what another contractor will charge. There is no one set price for heating and air-conditioning equipment installation. One of the major factors that affect your price is its size. No one can tell you what size equipment you’ll need without doing a load analysis on the home. That calculation essentially determines the insulation value of the home, i.e... What is the heat gain of the home, what are some other prevailing factors like room equipment, solar gain, or natural shading? You can compare prices between contractors to gauge what your cost would be between contractors, but this is a little tricky to do. Let me explain a little more. Let's say you get an installation quote of $5050.00 from contractor “A” who employs three technicians and operates two trucks. He also runs his operation from home. Contractor “B” charges $6200.00 to do the same job but has 10 employees and 5 trucks. He works out of a rental unit and offers his people a little bit better of a benefit package to recruit highly motivated workers. Everything else being equal (equipment size, SEER rating, furnace efficiency, brand name and additional material—other things that affect the price), is either one of these contractors defrauding you? No, their overhead is different. All these things play into a company’s labor rate. Just be aware of your expectations when it comes to performing any kind work in your home. If you want to pay an extremely low-inexpensive price below the average installation cost in your area then you are highly likely to get the quality of work that comes with that cost. Remember cheaper is not better!

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The only thing of importance, is the hvac professional you choose to use. Alot of manufacturer's pieces are built relatively the same, and will last about the same amount of time. The thing that matters most is what you can not compare between companies, and that is the installation. Purchasing a system is not like purchasing a car, where no matter where you buy it, they are all the same. Each installation is different, and usually what you are paying for is the level of expertise, and quality of the installation, the company who will actual give you the warranty, and the comfort that you will receive. Manufacturers warranties disappear every day. They always have a loophole where they can get out of paying, but your local dealer wants to keep you happy for future work, and to protect his reputation in the communiy. Look up 4 year old Nordyne and Goodman warranty problems. Choose the HVAC professional first. It will cost you the least in the long run. I have had to totally redo plenty of installations that were just performed because of an uncomfortable customer, and a system that keeps breaking down. The equipment is only as good as it's installation, and over 70% are not installed correctly.
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Yes Jupiter. It depends on the severity of the situation, is the mold encapsulated in the insulation. If yes, than replace [insulation] it with new. Is it on the casing of the heater? If yes, clean it with a mold neutralizing metal cleaner. It's not a matter of finding something or someone to clean or address the existing mold. It's a matter of finding a contractor to rectify what is causing the mold grow. It's coming from excessive moisture in the air-handler unit. I can say with 100% surety you’re dealing with poor airflow and/or incorrect equipment sizing! Either issue will cause excessive icing of the evaporator coil, which leads to excessive condensate water in the system. The condensate will eventually overflow the drain pan leaving stagnant water in the air-handler housing, which leads to mold growth. I would not let any contractor do any kind of temporary repair, add any device like a UV light or air-cleaning product until the aforementioned is corrected. I talk a lot about this in my videos and on my website. It is the result of improper system design from unqualified contractors. There is a reason why some guys cost more than others, and this is one reason why!




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I'd rate them equal,or close,as with several other brands. I'd be more concerned about the difference in installation and service down the road. Difficult to determine the difference ,but asking for detailed info about their installation,may convince you to choose one over the other.

The Dept. of Energy states that poor installations can cause a 30% efficiency loss! Plus with Gas their are saftey issues,venting properly etc.,and of couse the need for a "low Level" Carbon Monoxide Alarm.
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I think maybe you are confusing SEER, which is an efficiency-related rating (higher SEER means more effective use of the electric power used to compress the gas), and TONS rating, which is a measure of the total cooling power of the system. (Tons used to mean how many tons per hour of ice was used in evaporative cooling building systems - a Refrigeration or Cooling Ton equals 12,000 Btu/Hour of energy exchange. A BTU, which is another antique measure but still used, is the energy needed to change the temperature of a pound of water one degree fahrenheit. Unfortunately, because of varying humidity and evaporation, this is not readily related to house air heating or cooling without a lot of assumptions and some computations. Relating this to today's world - the Manuals BayAreaAc referred to account for all these energy conversions and determine an estimated cooling (or heating) requirement for your specific house. The type of construction, solar exposure, general climatic conditions such as average temperatures, humidity, and hottest and coldest normal ambient temperatures and desired inside temperture are all taken into account in the more sophisticated versions of the analysis, so there is no "standard", though a rough old rule of thumb was about 1 ton of cooling per 500SF of house. Obviously, this was a WAG only because it did not account for insulation, type of roofing, whether you live in Alaska or Miami, etc. The ACCA manuals do a very simplified form of evaluation to arrive at a "design", which generally will be adequate. OF course, highly precise calculations are not really needed because A/C units generally come in even ton ratings - so if you are at say 2.6 ton requirement you will be getting a 3-ton unit anyway. SEER ratings are not a direct measure of efficiency, but the relative difference between ratings gives you good idea of the unit's relative efficency in using electricity - so a 16 SEER should be about 19% more efficient (so roughly comparable lower electricity bill) than a comparably sized 13 SEER unit. 13 SEER is the lowest efficiency currently allowed to be built for general use, 19 SEER is about the highest efficiency made by pretty much all manufacturers, and about 25 SEER is the highest rated though very pricey shelf-item units, though special construction custom units can reach about 30 SEER. Note however, like any government sponsored rating, much of it is hooey when you get down to it - for instance, SEER ratings are figured based on 80 degree inside air temp and 82 degrees outside, when that is far from the normal case of mid to low seventies inside and high eighties or above outdoors. This makes the absolute SEER rating meaningless, but relative numbers still have meaning in comparing units. Note these efficiency ratings are for conventional air conditoners and heat pumps working in ambient air conditions. Ground sourced Geothermal or lake/river exchange cooling units, though initially more expensive in most cases, can greatly exceed the air-exchange unit efficiencies because they are exchanging heat with cold natural water rather than with a high-temperature outside air, and instead of continually compressing a gas are just circulating cold water. I worked on one geothermal cooling project which had almost infinite efficiency, which of course makes no sense - but the only power was for sensors and a control valve as the water flow was single-pass under gravity flow, so no power was used to circulate the water.
?
YOU.
You bought the home after an inspection that told you there were issues?
Every state has different laws regarding home purchases, contact your real estate agent to find out what remedies may apply.
THIS IS EXACTLY why you hire QUALIFIED and LICENSED contractors.

Doug
AirTekHP
CSLB# 824188 

Hvac reviews in Rockville

A

Rating
These guys
Rockville HVAC Contractors Provider Name Locked
and
Rockville HVAC Contractors Provider Name Locked
were great. They were very patient when educating me on what needed replacing in my old furnace. Their price was reasonable and I felt like they had a lot of integrity.
- Tanya W.
N

Rating
I first called
Rockville HVAC Contractors Provider Name Locked
when I saw a puddle under my water heater.
Rockville HVAC Contractors Provider Name Locked
came out the same day to diagnose the problem and offered me multiple options. Rather than replace the hot water tank,
Rockville HVAC Contractors Provider Name Locked
upgraded the system to a high efficiency tankless system. Not only was the installation meticulous, but he cleaned up everything.
Rockville HVAC Contractors Provider Name Locked
also informed me of multiple rebates and tax incentives. I have since used
Rockville HVAC Contractors Provider Name Locked
for a boiler and a kitchen and bathroom renovation with equally impressive results. With all this attention to detail, it’s hard to believe that his prices were more than 30% lower than
every other estimate I received. We couldn't be happier.
- Diana B.
F

Rating
I was connected to
Rockville HVAC Contractors Provider Name Locked
& Cooling through my home owners warranty. They were responsive and came out to determine the issues when my furnace broke. They assured me I did not need a new furnace, just a new heat exchanger, which would be covered by the warranty. Explained that there was some urgency to have the work done, or I could have issues with high Carbon Monoxide levels in the house. I scheduled the work, which they came out and did on time and quickly.
Later that evening, the CO monitors in the house went off. Ultimately, the fire department was called, and I was informed that the levels in the house were "fatal" had the alarms not gone off. Was told that the dog would not have likely made it had we not have been home when the alarms went off. The gas company was called, turned off the gas and did not allow me back in the house. Despite 6 calls to
Rockville HVAC Contractors Provider Name Locked
and Heating, I got no response that evening.
Had to call 3 more times in the AM, still was unable to get an answer (I was talking with their answering service), it took the warranty company to get them on the phone. They sent out the same technician (which I had asked them not to do), who was immediately defensive and said I couldn't prove the CO issues were a result of the work he did.
Turns out he knocked some duct work loose, which was an honest mistake. However, he neglected to do any testing for CO gasses before he left the house. His only reason was that I was in a hurry for him to finish. This was negligent at best. Despite the admission that he had caused the CO, he refused to take responsibility and would not acknowledge the seriousness of the error. To add insult to injury, he informed me that this wouldn't have happened if I had just bought a new furnace (which they told me I didn't need to do), and left me with a $1,200 estimate to "fix" additional parts.
3 weeks later, I have never heard from anyone at the company to discuss the situation. I have reported them to the warranty company. If you chose to use this provider, I would insist upon a CO check and I would make sure your CO monitors are working. Their negligence put my entire family at serious risk.
- Jennifer C.
A

Rating
The install went great.
Rockville HVAC Contractors Provider Name Locked
arrived on time and called to let me know he was on the way. This was a day when we got four inches of snow and Federal offices and schools were closed. He was very polite and wore shoe covers so he would not mess up the floor. I would definitely use him again in the future.
- Warren H.
B

Rating
The tech did not close the air return grill correctly and appears to have caused it to become lopsided after it was forced closed, which I did not notice for a few weeks later. I was able to take it apart and repair it as best as I could. No worries.
- Alvin S.
A

Rating
Our furnace finally bit the dust on the day before Christmas Eve. After leaving several phone messages on answering machines of various companies and getting nervous due to the holiday, I was extremely surprised that the owner of J D
Rockville HVAC Contractors Provider Name Locked
answered my call personally without hesitation. He was very friendly and informative and offered to come right over! He gave us a reasonable estimate and left to give us time to consider it, or shop around. 2 of the other companies had called me back within a few hours only to tell me it would be 2-3 weeks until they could get to us. We called J D
Rockville HVAC Contractors Provider Name Locked
back and were informed he would complete the job that very afternoon! We were very happy with every aspect of his job, from the most reasonable estimate, to his punctuality, his friendliness and his effort to perfectly clean up the area after he and his partner were finished. We are very happy customers and would highly recommend J D
Rockville HVAC Contractors Provider Name Locked
Heating and Air Conditioning for your needs.
- Lucy W.
A

Rating
Furnace went out and I called 1st thing in the morning. Couple hours later it was fixed. Took only a minute or two for him to diagnose the problem once he arrived. Could tell he knew what he was doing.
- Chuck C.
B

Rating
The repair Tech did an excellant job of checking out the furnace for the cause of the breaker tripping. It ended up being a bad breaker. He also check out my second furnace while he was there.
- Susan L.

All HVAC Contractors in Rockville, MD

Companies below are listed in alphabetical order. To view top rated service providers along with reviews and ratings, Join Angie's List Now!

'NewJak' Executive Limousine

PO Box 1002
Beltsville

1st class handyman

portship rd
Dundalk

24/7 Express Repair Network & Hotline

2505 Lord Baltimore Dr.
Windsor Mill

3-D PLUMBING & HEATING INC

P.O. Box 1462
Bowie

A & J Home Remodeling

3212 South 13th Rd

A & S Mechanical Inc

PO Box 1029
Chesapeake Beach

A D White Plumbing & Heating

3834 Mount Olney Ln
Olney

A- VAN SANT CONSTRUCTION CO

14304 HARRISVILLE RD
Mount Airy

A-1 AIR & ICE SERVICE CO

1225 DISTRIBUTION PL
Beltsville

A-Z Plumbing,LLC.

3905 Blackburn Lane
Burtonsville

AAH Mechanical

4200 Hoffman Dr

Abby's Heating and Cooling

4403 romlon street apt#102

ABC Plumbing and Drain Service

6720 James Lee Street

ABS Unlimited Auto Repair

3215 Old Pickett Rd

Absolute HVAC

5588 Shadybrook Dr.

AC Repair DC

3509 Connecticut Ave NW

Academy Heating & Air Conditioning

11720 Nebel St
Rockville

Accel Heating And Cooling LLC

16021 Industrial Dr Ste 7
Gaithersburg

ADAM'S HEATING & A/C

1122 Hornell Dr
Silver Spring

Adela Construction

10319 Westlake Dr
Bethesda

ADI HEATING & AIR COND LLC

21529 RIPPLEMEAD DR
Gaithersburg

Advanced Building Services

23475 Rock Haven Way

Advent Duct Cleaning Inc

154 Regent Avenue

AERO ENVIRONMENTAL SVCS

8376 Sweet Cherry Lane
Laurel

AEROSEAL OF MARYLAND

3 KING AVE
Frederick

Affordable Aire & Refrigeration

13131 Blue Ridge Rd
Hagerstown

Aguilar Home Improvement LLC

9622 Laconia Dr
Adelphi

AHR SERVICES INC

6226 Berlee DR

Aim To Please Plumbing & Electric

3660 S Leonard Springs Rd

Air 1 Mechanical System Inc.

45710 Oakbrook Ct Ste 140

Air Benders

23571 Pebble Run Pl

Air Control LLC

1774 Westwind Way

Air Doctor LLC - HVAC Specialists

6115 Appletown Rd
Boonsboro

Air Duct Maids

7942-B Cluny Ct

AIR FLOW SVC

1115 TAFT ST
Rockville

Air Master 07, LLC

3152 Annandale Rd

AIR MASTERS

PO BOX 710034

Air Pyramid Service

14800 Pratt St
Upper Marlboro

AIR QUALITY HEATING & AIR COND

100 TULIP DR
Gaithersburg

air quality hvac llc

25723 lennox hale dr

AIR SUPPLY INC

14672 SOUTHLAWN LN
Rockville

AIR SYSTEMS INC

806A BARKWOOD CRT
Linthicum Heights

AIR TECH INT'L

7903 Cole Ave
Takoma Park

Aire Fresh

PO Box 4945
Silver Spring

Aire Serv Of North Montgomery County

129 Challedon Dr
Walkersville

Airtech Specialist

6424 Quander Road

AIRTEK AIR CONDITIONING INC

14650 ROTHGEB DR
Rockville

AIRTRON CORP

5123 Pegasus Ct Suite M
Frederick

Airway Climatrol LLC

505 Kennedy St NW

AIRWAYS UNLIMITED Inc

9305 COLUMBIA BLVD
Silver Spring

Airwiz VideoCam Duct Cleaning

22700 Ridge Rd
Germantown

AJ Ross Service

5406 Riverdale Rd
Riverdale

Alba Contracting Co

1510 S George Mason Dr

Albright Cloud's Heating & Cooling

35 Henry Ford Circle Suite K
Waldorf

All American AC & Heating

19515 White Ground Rd
Boyds

All Appliance Pro

400 Spruce Ct

ALL AROUND PLUMBING

530 E Church St
Frederick

All Good Home Inc

5 Ridout St
Annapolis

All Pro Services Inc

1215 Ritchie Rd
Capitol Heights

All Season Aire

4480 Printers Ct
White Plains

all service pro

Silver Spring

Allcity Hvac Services

2104 Savannah place suite

Alliance Heating & Cooling Inc

12301 Washington Square
Waldorf

ALPHA PLUMBING & DRAIN SERVICE

18004 Meadowsweet Ct.
Sandy Spring

Amazing Heating & Air Conditioning Inc

1922 Light Street
Baltimore

Ambassador Services Inc

10330 S Dolfield Rd
Owings Mills

American Custom Contractors Inc

15728 Crabbs Branch Way
Rockville

American Decorating Center

40 Pidgeon Hill Dr

American Home Energy Corporation

112 E. Main Street
Elkton

AMERICAN HOME SERVICES

34 Shining Willow Way
La Plata

American Home Shield

889 Ridge Lake Blvd

American House Incorporated

46637 Brownwood Square

American Leak Detection - Maryland

16499 Frederick Rd
Woodbine

AMGC LLC

18534 Cherry Laurel Lane
Gaithersburg

AMS AIR CONDITIONING & HTG

4111 RIM ROCK RD
Rockville

AMS Contractors

4811 Rim Rock Rd
Rockville

Andy's Pipe Dream

15954 S Mur Len Road

ANS MECHANICAL LLC

10026 Wedge Way
Montgomery Village

Ant Builders - Shy Nair

801 VARNUM ST NW

Anthony Mechanical & Electrical, LLC

938 Holy Cross Rd
Street

any appliance services

6346 rockshire st

Any Brand Appliances

3440 Rock Spring Ave

Appliance Repair Leaders LLC

serving VA DC ad MD

Appliance Repair Rockville MD

9801 allenford circle unit#302
Rockville

Appliance Repair Washington DC

2201 40th place suite#4

AppliancePartsPros.com

16501 Ventura Blvd Ste 500

APS Heating and Air

451 Hungerford Dr
Rockville

ARAS PRO-TECH

8127 15TH Ave. Apt. 101

Archangel Remodeling

642 Wayward Dr
Annapolis

Argent Heating And Cooling LLC

501 Church Street NE

Arme Construction, Inc

13317 Rushing Water Way

Arminco Air Inc

1319 Shepard Dr

AS YOU LIKE IT HEATING & AC

6745 MID CITIES AVE
Beltsville

Aspen Air

5383 Annapolis Dr
Mt Airy

Aspen Hill Plumbing LLC

2238 Distribution Cir
Silver Spring

Assured Comfort Services

3221 Beverly Dr
Huntingtown

ATC Heating and Cooling Inc.

PO Box 300
Germantown

ATCO Services Inc

15924 Derwood Rd.
Derwood

Atlantic Duct Cleaning

22875 Bryant Ct, Suite 120

ATLAS AIR CONDITIONING

5750 BOU AVE
Rockville

Auto Clinic Care

5531 Nicholson Lane
Rockville

Auto Masters Inc

7935 Queenair Dr
Gaithersburg

B & G Heating & Air Inc

12030 Industrial Park Ln
Bishopville

B F GARTRELL & SONS INC PLUMBING

P.O. Box 10668
Silver Spring

B&C WELDING & FABRICATION

3505 MARLBROUGH WAY
College Park

B.K. Services

504 kibler circle

B/B ENVIROSYSTEMS

6109 GLEN OAKS CT

Bair Necessities

763 Rte 3 N
Gambrills

Barnes Plumbing & Heating

4901 Rugby Ave
Bethesda

Basement Masters

1680 E Gude Dr
Rockville

BELTSVILLE HEATING & AC

11610 BALTIMORE AVE
Beltsville

Beltway Cleaning Systems

1615 Parkridge Cir Apt 215
Crofton

BEN'S AIR CONDITIONING & HEATING

3308 GEATON DR
Upper Marlboro

Benjamin Franklin Plumbing

2702 Back Acre Cir
Mount Airy

BERNIE STOVER HVAC

505 SHADY GLEN DRIVE
Capitol Heights

Bernie's Heating & Air

505 Shady Glen Dr
Capitol Heights

Beschenbossel, Dr. John

5225 Wisconsin Ave NW

Best Maids MD Cleaning Services

13017 St charles Place
Rockville

Bethesda Refrigeration Service Inc

9016 Edgewood Dr
Gaithersburg

Bethesda Systems

4712 Rosedale Ave
Bethesda

Bey's Refrigeration & Heating

4131 Hayward Ave
Baltimore

BGE Home

1409 Tangier Dr
Middle River

BLC Services LLC

22276 Great Trail Ter

BLINKHORN PLUMBING

11216 Dewey Rd
Kensington

Blue Dot Services - 8554

125 Industry Ln
Forest Hill

BMC Clower Heating & Air Conditioning Inc

9162 Brookville Rd
Silver Spring

BMC Installation Heating & Air LLC

8854 Monard Dr
Silver Spring

BOLAND SERVICES INC

12320 PARKLAWN DR
Rockville

BOLAND TRANE

12331 WILKINS AVE
Rockville

Borchers Mechanical Services Inc

16413 New Hampshire Ave
Silver Spring

Bowie Shell

15651 Annapolis Rd
Bowie

Bowie Siding and Roofing Inc

13109 14th St
Bowie

Brad4Cad LLC

5657 Utrecht Rd
Baltimore

Bray & Scarff

831 Rockville Pike
Rockville

BROADHEAD MECHANICAL LLC

9303 DECATUR PL
Laurel

BROOKEVILLE RADIANT

6815 WHISTLING SWAN WY
New Market

BryZac LLC

4423 Lehigh Rd
College Park

BST Plumbing & Heating

8802 Lew Wallace Rd
Fredrick

Budget Movers Inc

2932 Willoughby Rd
Parkville

BUDGET PLUMBING & HEATING CO INC

4206 EDMONSTON RD
Bladensburg

BURIC'S HEATING & A/C INC

4301 TEMORA MANOR LN
Ellicott City

Burtonsville Fuel Co Inc

15408 Old Columbia Pike
Burtonsville

Byrdaire, Inc

16904 Supplee Ln
Laurel

C-CON Inc

7646 Fullerton Rd

C2 Construction Services

5501 Merchants View Sqr

CALIXTO REYES

1903 E BEECH RD

CALVERT CONTROLS INC

2055 Solomons Island Rd Unit A
Huntingtown

CALVERT JONES

9901 MEDICAL CENTER DR
Rockville

Capital Climate Services

8913 Hilton Hill Dr.
Lanham

Capitol Boiler Works

7921 Woodruff Ct

Capitol Chimney Service LLC

4408 Bennion Rd
Silver Spring

Cardinal Contractors

18078 Purvis DR unit A

Carmel Mechanical Svc

3016 Strathmeade St

Carroll Home Services

2700 Loch Raven Rd
Baltimore

Cary Electric Company

15411 Baileys Lane
Silver Spring

Casas Remodeling

3901 Lyndhurst Dr.

Case Design Remodeling Inc

4701 Sangamore Rd
Bethesda

CGR Construction LLC

6704 Allison St.
Hyattsville

Charles A Klein & Sons

5220 Klees Mill Rd
Sykesville

Chesapeake Kitchen Design

4622 Wisconsin Avenue NW

CHEVY CHASE REMODELING

7722 Whiterim Ter
Potomac

Chryst Brothers Construction

6450 Old Dominion Dr

City Renovations & Remodeling LLC

938 E Swann Creek Rd
Fort Washington

Classic Air Inc.

10 Irongate Dr
Saint Charles

ClemAIR Heating and Cooling LLC

10803 Highwood Pl
New Market

Climate Control Refrigeration

4103 Dallas Hutchinson St

Climate Controllers Services

110 East H Street
Brunswick

Climate Heating & Cooling

6714 A Electronic Dr

Climate Warrior

2302 Collingwood Road

Clinton Electric Co Inc

1850 York Rd
Lutherville Timonium

Cold Comfort HVAC Services

10404 parkwood dr
Kensington

Coleman Plumbing & Heating Co

13414 Fairland Park Dr
Silver Spring

Collins Plumbing & Heating

PO Box 605
New Market

Columbia Auto Collision Center Inc

9245 Berger Rd
Columbia

COMBUSTIONEER CORPORATION

643 LOFSTRAND LN
Rockville

COMFORT DOCTORS, LLC

7932 OTTER COVE CT
Montgomery Village

Comfort Zone Heating & AC

18605 Hollow Crest Dr
Olney

Commercial Management Services

3900 Watson Place, NW Suite #G3B

Complete Enhancement, LLC

6103 Baltimore Avenue
Riverdale

COMPLETE FACILITIES SUPPLY

10011 Bent Tree Ln

Complete Kitchens & More

459 Baltimore Blvd
Westminister

Compton Air Conditioning & Heating, LLC

7916 Old Branch Ave
Clinton

Condon Reed Inc

140 W Jefferson St

Continental Services

2192 Solomons Island S
Prince Frederick

Cook Construction Contracting

8552 Dakota Dr
Gaithersburg

CREATIVE WOOD CONCEPTS

16201 OAK MEADOW DR
Derwood

CRG Remodeling

1141 5th Street Northeast

CroppMetcalfe

8421 Hilltop Rd

CroppMetcalfe

1162 Taft St
Rockville

CSG DESIGNBUILD

5840 CAMERON RUN TER

Custom Management Service

10912 Oakwood St
Silver Spring

Cutting Edge Mechanical Corporation

11921 Freedom Drive Suite 550

Cyprus Air Fireplace Systems

7525 Richmond Highway

D H VEIRS CONTRACTING LLC

9920 OLD SPRING RD
Kensington

D&A Service Company Heating & Cooling

4506 Emerson Street
Hyattsville

D&T Construction

PO BOX 459
Owings

D&W Repair Service

18451 Heritage Hills Dr
Olney

Daniel's Home Services

6506 96th Ave
Lanham

DAVID B FIELDER INC

11400 ROCKVILLE PIKE
Rockville

Davis Sheet Metal Inc

12003 Lord Fairfax Hwy

DEDHICO HOME IMPROVEMENTS

15416 BAILEYS LN
Silver Spring

DeltaTek Hvac Services LLC

8551 Ashwood Dr.
Capitol Heights

DG Liu Contractor Inc

25400 Old Hundred Rd
Dickerson

Diversified Hvac Services Inc.

7615 L Rickenbacker Dr.
Germantown

DMV Kitchen & Bath Inc

429 E Diamond Ave
Gaithersburg

Donald L Lowe & Sons, Inc

4937-H Green Valley RD
Monrovia

Donmar Co Inc

22821 Silverbrook Center Dr

Downtown Beer and Wine

5751 Fishers Ln
Rockville

Drain Surgeon Plumbing & Heating

5712 Kirby Road
Clinton

Duct Doctor USA of Northern Virginia

42449 Spring Splendor Dr

DUCTZ of Southern Maryland

10302 Southern Maryland Blvd
Dunkirk

Dun-Rite Plumbing and Heating, LLC

7004 Rock Creek Drive
Frederick

Dusty's Painting Plus

3104 Sedgwick Lane
Bowie

DW Dively Construction

2107 Mt Vernon Ave

Dynamic Heating and Air Conditioning, L.L.C

1310 Mimosa Lane
Silver Spring

E & V Heating and Air

9131 edmonston terrace
Greenbelt

E Y Construction Inc

7723 Heritage Dr

E3 Technical Group

PO Box 8255
Parkville

Eagerton Plumbing Co Inc

1093 N Mcduff Ave

Earth Friendly Services

3015 Sycamore Pl
Huntingtown

East Coast Builders, Inc

29948 Barger Dr
Mechanicsville

Easterday Well & Pump

9265 Brown Church Rd
Mount Airy

Eastern Tech

45945 Trefoil Ln

eco home air and energy llc

120501 timber hollow pl
Germantown

ecobeco

107 A West Edmonston Drive
Rockville

ED ENTERPRISES PLUMBING & HEATING

11023 LOCUST DR
Damascus

Edge Energy

6854 Distribution Dr
Beltsville

EFFICIENT HEATING & AIR CONDITIONING

11950 WILHIDE RD
Thurmont

Efficient Home

3905 National Dr
Burtonsville

Elan-Aire Mechanical Services Inc

3906 Maurice Ct
Monrovia

Elec Pros - Baltimore Electricians

242 South Washington Street
Baltimore

Eli's Heating & Air Conditioning

11623 Regency Dr
Potomac

Elite Development

4401 Connecticut Ave NW

Elysian Energy LLC

1414 Fenwick Lane
Silver Spring

ENERGY EFFICIENCY EXPERTS

1800 East West Highway
Silver Spring

ENERGY SYSTEMS INC

PO BOX 450
Lothian

Energy Wizard

206 North Lake Ct
Stevensville

Enterprise A/C&HTG

7937 suite d Penn Randall PL
Upper Marlboro

Enviro-Tek Services

P.O. Box 159
Highland

ENVIRONMENTAL CLIMATE CONTROL

1414 RITCHIE MARLBORO RD A-5
Capitol Heights

EPR Automotive

19304 Woodfield Rd
Gaithersburg

Esby LLC

1503 Trinidad Ave NE

EURO DESIGN REMODEL

5483 Harris Farm Ln
Clarksville

Evolution Contruction Inc

5012 Adrian St
Rockville

EXSITE SERVICES

6347 Macaw Ct Ste B
Elkridge

F P DESIGNS LLC

Red Admiral Way
Germantown

F S Campbell Co Inc

200 E. South Street
Frederick

F W Harris

PO Box 392

FAIRLAND PLUMBING - HEATING - COOLING

4910 Brookeville Road
Brookeville

Franklin Construction LLC

10377 Green Holly Ter
Silver Spring

Freeway Construction

1402 North Capitol Street NW

FREMONT REFRIGERATION & AIR CONDITIONING

8192 BEECHCRAFT AVE
Gaithersburg

Fresco Air LLC

4423 Lehigh Rd
College Park

Fresh Air Concepts

5195 Raynor Ave
Linthicum Heights

FUSION ELECTRIC

18415 THUNDERCLOUD RD
Boyds

G C Construction LLC

9201 Gilmore Dr

GAC Services (Gaithersburg A/C & Heating)

227 E Deer Park Drive
Gaithersburg

Galaxy Electric LTD

6404 Telegraph Rd

GARDENER'S INC

8995 URBANA CHURCH RD
Frederick

Gary P Frank Inc

8918 Ridge Pl
Bethesda

GCA CONTRACTING LLC

P.O. BOX 406
Riverdale

General Remodeling Group

11722 Newbridge Crt, Reston, Virginia 20191

Genesis Company

3625 Martin Luther King Jr. Avenue

Georgetown Exxon

1601 Wisconsin Ave NW

Georgetown Shell

1576 Wisconsin Ave NW

Georgia Comfort Heating & AC

120 Canongate Kirk Cir

Germantown Heating & Air Conditioning

7634 Airpark Rd
Gaithersburg

GERMANTOWN SERVICES

2991 SUMMIT DR
Ijamsville

GHR AIR CONDITIONING CO

4811 RIM ROCK RD
Rockville

Ginalick Electric Heating & AC

115 S Main St
Mount Airy

Glenmont Heating & A/C

2267 Lewis Ave
Rockville

Glover Enterprises Inc

300 Chatham Heights Road

GOLDEN ELECTRIC INC AIR COND

100 S ADAMS ST
Rockville

Grand Design, LLC

977 A TONIA CT
Sykesville

Green Builders LLC.

6924 Sundown Rd
Gaithersburg

Green Hill Mechanical

6881 Shepherdstown Rd

Green Market Solutions

3843 N Broadway St

Green Shift Energy

707 President St Apt 925
Baltimore

Green Vision Heating & Air, LLC

13419 Cavalier Woods Dr

Greene Home Services, LLC

13208 Ardennes Ave
Rockville

Griffith Energy Services Inc

200 E South St
Frederick

Griffith Energy Services Inc

2510 Schuster Dr
Hyattsville

GRIFFITH ENERGY SERVICES INC

3173 Solomons Island Rd
Edgewater

Griffith Thomas, LLC

3205 Winnett Rd
Chevy Chase

Gross PHC

PO Box 2087

Grove Heating and Cooling, Inc.

2361-A Rutland Road
Davidsonville

H & C HEATING & COOLING

9010 MAIER RD
Laurel

H & F Service Co

4328 Brookside Dr

H L Harris Plumbing & Heating Co

One Preserve Way
Rockville

Hadad Services

1717 Penn Ave

HALL'S HVAC

39200 Hodges Rd
Avenue

Hanes on Homes

5284 Randolph Rd.
Rockville

HARRY BRASWELL INC

312 CALVERT AVENUE

Harvey W Hottel Inc

18900 Woodfield Rd
Gaithersburg

HAS Construction LLC

3421 14th Street NW

Hassle Free Home Services Inc

PO Box 59619
Potomac

Hawkins Electric Service, Inc

8667 Cherry Lane
Laurel

HAYGOOD MECHANICAL LLC

4200 CANYONVIEW DR
Upper Marlboro

HC UNITED CO.

3603 Janet Rd
Silver Spring

HD Johnson Inc

5500 Macarthur Blvd NW

HEAT TECH INC

PO Box 4453
Rockville

Heating & Air Solutions, LLC

1960 Harpers Ct.
Frederick

HFH PLUMBING, HEATING & AIR CONDITIONING

8799 Darcy Road
District Heights

Hi Tech Auto

2020 Chaneyville Rd
Owings

HOFFMAN SHEET METAL INC

5655 INDIAN HEAD HWY
Indian Head

Hogan & Sons Inc

840 E Main St

Holmes Mechanical Contractors (HMC)

8900 Edgeworth Drive
Capitol Heights

holy spirit heating &cooling

6455 livingston rd
Oxon Hill

HOME AIR CONTROL

1239 R Reece Road
Severn

Home Air Services Inc

12288 Wilkins Ave
Rockville

Home Appliance Repair

501 Church St NE

Home Breakthrough LLC

606 Swallowtail Drive
Frederick

Home Contractors Plus

8402 Quill Point Dr
Bowie

HOME DEPOT

21010 FREDERICK RD
Germantown

HOME DEPOT

1651 RESTON PKWY

Home Depot

2421 Old Taylor Rd

Home Depot - Annandale

6555 Little River Trnpke

Home Depot - Gaithersburg

15740 Shady Grove Rd
Gaithersburg

Home Depot - Hyattsville

3301 E W Hwy
Hyattsville

Home Duty

1733 Northridge Lane
Frederick

Honest HVAC

6304 Aaron Ln
Clinton

Horizon Mechanical Services LLC

8039 Penn Randall Pl. Set. C
Upper Marlboro

House To Home Solutions

3508 May St
Silver Spring

HOWARD HEATING & COOLING

4701 BALTIMORE AVE
Hyattsville

HPC Maintenance, LLC

4010 Brussels Way

Hubrig, LLC

17707 Hidden Garden Lane
Ashton

Hugee Corp Inc

1818 New York Ave Ne

HVAC DYNAMIC

1912 ARCOLA AVE
Silver Spring

HVAC Mechanical Service, LLC

29307 Horse Range Farm Court
Mechanicsville

HVAC/Rios, LLC

Mount Rainier

HVACR Intelligence

22414 Frederick Rd
Clarksburg

I-Ron Mechanical.

13716 Kaywood Dr.

Iceman Refrigeration, Inc.

5012 Harvard St
Saint Leonard

Ideal Air LLc

PO BOX 238
Mechanicsville

Impressive Kitchens by Bakers

1330 Old Bridge Road

Indoor Air Solutions

P.O. Box 2481
Kensington

Infrared Tools Energy Services

2147 Priest Bridge Dr Ste 9
Crofton

Integrated Climate Systems

PO Box 706
Bladensburg

J & P HEATING & AIR CONDITIONING INC

8043-B PENN RANDALL PL
Upper Marlboro

J & S Services

Southern Maryland
La Plata

J F PLUMBING & HEATING

15751 Crabbs Branch Way
Rockville

J S Mechanical System

11710 Old Georgetown rd, Unit# 918
Rockville

J&J Mechanical

po box 8332

J&K Air Conditioning

23101 Frederick Rd
Clarksburg

J.R Remodeling Inc

1485 Eden Drive
Frederick

James A Wheat & Sons Inc

7834 Beechcraft Avenue
Gaithersburg

Jarboe Mechanical LLC

910 Leesburg Ct
Huntingtown

JAS HVAC SERVICES, LLC

P.O. Box 2471
Germantown

Java Garage Auto Repair & U-Haul Rental

2700 Hanover Pk
Manchester

JB's Heating and A/C, Home Improvement

3087 Chester Grove Rd
Upper Marlboro

JBI Air Conditioning Plumbing & Heating LLC

12217 Distribution Pl
Beltsville

JBI Services LLC

7836 Airpark Rd
Gaithersburg

JCabido Remodeling

15605 Bradford Dr.
Laurel

JD Contractors LLC

2512 N Scott St

JDM Heating & Air Conditioning, LLC

5509 Jefferson Blvd
Frederick

JDT Management

Capital Heights

JES Foundation Repair

1741 Corporate Landing Parkway

Jiffy Plumbing & Heating, Inc.

4623 BALTIMORE AVE
Hyattsville

Jim's Inc.

PO Box 5451
Rockville

John C Flood of VA Inc

4419 41st Street
Brentwood

John C Flood of Virginia

6430 General Green Way

JOHN C GRIMBERG CO

3200 Tower Oaks Blvd Ste 350
Rockville

JOHN F SIMMONS CO INC

14704 OLD BARN CT
Silver Spring

John G Webster

10738 Tucker St
Beltsville

Johnson Home Preservation and Development

15 Straw Hat Road
Owings Mills

Jones-Rogers Inc

14522 Lee Rd

Jony Heating and Cooling

4704 addison dr
Oxon Hill

Joseph C Bauer Inc

8035 A Penn Randall Pl
Upper Marlboro

JOSEPH HEIL CO. INC.

8177 MISSION RD
Jessup

JPG Plumbing Services, Inc.

8260 Patuxent Range Rd Ste H
Jessup

JRS AUTO REPAIR

14709 Baltimore Ave Ste 3
Laurel

Juan Linares

2822 Lindel St
Silver Spring

JW Home Improvement

1390 Chain Bridge Rd

K W SMITH & SON

9106 Industry Drive

K4 Associates LLC

649B Lofstrand Lane
Rockville

KBM Mechanical Service INC

451 Hungerford Drive
Rockville

Keith Development Systems Inc.

2000 Ednor Rd
Silver Spring

KENSINGTON PLUMBING

6804 PINEWAY
Hyattsville

Kepler Services LLC

1415 G Street

KIRLIN SPECIAL PROJECTS DIV

515 DOVER RD
Rockville

Krafft Service Corp

5707 Edsall Rd
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