Are variable speed HVAC units worth the $$$?
2 speed/stage condensor is really well suited to a zoning system with ECM variable speed fan/airhandler. The Lennox Harrmony 3 I installed has the ability for the zoning panel to control the ECM motor speed and firing rate for a 2 or 3 stage and now modulating Lennox furnace according to how many zones are open. VERY sweet stuff. Need a 2 stage AC as it can handle several zones closed (unload) a lot better than a 1 stage. Should save him a LOT of electricity $$ as it can de-humidify much better than a basic system.
"Cut it twice and it is still too short".
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Last edited by yuri; 05-07-2011 at 02:11 PM.