Recent Review: Very well!Having researched the Lennox brand signature series Heat pump system XP25 and then having it installed is liken to studying for that final exam and then acing it. I researched the efficiency, the Energy Star rating and the ranking of heat pump systems. When I typed “best heat pump system” in the search bar during my online research, the top ten and even the top five heat pump systems always reflected at least two of the Lennox series XP heat pump systems. I went with the XP25 over the XP21 simply because I was selecting a unit for my home and my family and I wanted the most efficient. I wanted the best. In test after test and comparison after comparison, the XP25 always garnered nine out of ten times the number #1 place at the top. The Lennox XP25 was always found on the list of results for the best system. It was consistently rated as the most efficient system on SEERS/HSPF ratings. As for practical operations, it’s among the quietest; so much so that to confirm it is running, we have to check the air flow from the vents. We paired it with the iComfort S30 Smart Thermostat, which by the way is what we call our “window view in the hallway”, as the thermostat when in screensaver weather mode presents a picture of the weather conditions outside. It looks like a live picture. During the day you may see blue skies with clouds or rain falling in puddles on the ground; depending on the current weather conditions. Yes, when we want to impress visitors, we show them the thermostat and all who have seen it, have been amazed. It is truly like a window in our hallway. Given this is the most advance smart thermostat we know of, there are a variety of functions that can be performed such as linking it to your smart phone for operation of the house unit from wherever you are, either outside or from out of town. The company can also perform system diagnoses remotely, via the internet or phone and this saves time because a repairman can come whenever the system indicates. I am so pleased with all the things this unit can do with the smart thermostat that it is too much to mention here. I’m impressed, amazed and feeling very accomplished having had this unit installed. And should the time come, this unit can also adaptable of solar applications and equipment should I be so incline to expand. The look, the efficiency, the warranty all ensure that this was money very well spent. It is great to spend money and actually feel like you have gotten your money’s worth and more. This is where I am. You can’t beat this system. I feel that it is among the best if not the best heat pump systems on the market. We are quite happy with our Lennox XP25 and our window view in the hallway.