The Lennox XC17 Air Conditioner, a Dave Lennox Signature Collection is the most efficient single-stage AC unit you can buy. This air conditioner allows you to add solar modules and create a solar powered system.
I had Environmental Heating and Air Solutions do a routine check of my central heating unit, My service person, Kirk, was prompt, efficient, and professional. My unit checked out OK, and Kirk gave good advice for maintaining it for optimum performance. He also freely checked an additional electronic filter that had been installed with the heating unit (both of them in the attic and inaccessible to me) and offered advice about that. He was very pleasant and presented options without any pressure whatsoever. As a single woman who has occasionally felt taken advantage of by service people, I really appreciate this kind of service.