Yes, very quiet Machgunner. The only time I can hear the outside unit is when I put it in “powerful” mode. Then I can hear the hum of the compressor through the wall that it’s mounted on. Outside I only hear air movement. So far we really like it alot but have only used the a/c and the dry modes extensively. I’ll know more this winter. But I intend to fill our oil tank as the back up to our backups, and the wood racks because we really like wood heat, and the visible fire, when it gets really cold, below 20°F and if it stays there for awhile. Wood heat isn’t something entered into for just a few hours, or at least I don’t. When I light the wood stove I intend to use it for days or longer.
Nick, it’s too late for horror stories. The heat pumps are installed for better or worse. I’ll find out for myself what’s what in the cold weather in 4 more months. But as mentioned above they aren’t our only source of heat. Everything we used for decades is still in place and working fine. But Efficiency Maine gives them their seal of approval for our winter and paid us to have them installed to save us $ and energy. It’s said that they get inefficient at -5°F but are usable down to -20. But our plan is to not use the heat pumps before that temp’ is reached. But again, I intend to find out since we already have them. FWIW, in theory there is heat available until one reaches 0°Kelvin (-273C). The trick is to collect it for use. That technology we don’t have in a heating unit.
Frankly heat pumps are beyond my understanding and at some point I need to trust the folks who know more than I do. Which is what we did.
I’ll revisit this after we start to get our electric bills, next month will be the first, and after I have some winter experience. But the fans appear to be low draw and the heat exchanger outside has an incredibly fine and complex fin network to maximize efficiency from the air movement that is induced by the fan.
Machgunner, question for you… should I hose out the fins once in awhile to remove dust and such for good heat transfer? Or is it hands off?