Recent Review: From the get-go, I was extremely impressed with Steve Markussen (our sales rep) and the entire team at Sila Air. They provided a very reasonable quote compared to their competition, and a clear, definitive plan of what we should expect and what could/could not be done given our home's construction. Since our home, like many in New England, is wood-frame and older construction, with a finished attic, we weren't really interested in opening up the walls to install ductwork - the high-velocity air conditioning system that Sila offers was the solution. It uses 2" hose routed through the spaces between the rafters/stringers, and the vents (we ended up with between 2 and 4 per room) look like recessed light fixtures with a small hole in the center. Very unobtrusive. Danny, a lead installer with 13 years' experience doing these systems, called us promptly after signing the agreement to schedule our installation, which took a total of 4 days and was performed by himself and another gentleman. They were courteous and professional throughout the installation process - even though I work from home, I hardly noticed that they were here - and cleaned up thoroughly as they went along from room to room, covering everything in plastic sheeting before doing anything which generated dust, then vacuuming up whatever did fall elsewhere. When all was said and done, we had a very clean installation in our attic kneewall space of an energy-efficient air handler and a MERV-16 filtration unit (same filtration level hospitals use for general surgery), along with a carefully-laid-out series of vents throughout the rooms and an unobtrusively-placed condenser unit outside the home (which thankfully is very quiet). Since installation, we've noticed that we don't feel drafts unless standing directly below the vents, which make only a very soft"whooshing" noise when on, and our rooms and attic are consistently at a uniform temperature. The filtration unit makes a huge difference - no pollen whatsoever, a significant reduction of dust everywhere, and the removal of the odor of the vehicles which pass by on the heavily-traveled street we live on. Bottom line: I would highly recommend both Sila and the high-velocity system to anyone looking to economically add central air to their home without the disruption of tearing walls out. Steve was excellent to work with, as was everyone else.