These heat pumps seem very similar, scroll compressors, titanium exchangers, warranty periods, COPs within range... What are the problematic brands and models?
JoshU
01-28-2007, 03:18 AM
In regards to COP: Most companies will lie about their COPs. I know that AquaCal (www.aquacal.com) is accurate with their ratings. Ask the manufacturer for an independent lab test showing their COP rating.