On 22 Mar 2021 at 11:33, Willie via EV wrote: > How can they efficiently extract heat from such cold air? I'm eager > to learn details and see evaluations.
They can indeed extract heat, but I'm not so sure "efficiently" necessarily applies. I have a Mitsubishi Mister Slim M series mini-split. It's supposed to produce 100% of its rated output at 5 deg F and significant heat to -13F. Anecdotally, that seems to be the case. Certainly there is still plenty of output. However from what I've read the COOP falls apppreciably at those temperatures. Generally when temperatures fall into the single digits F, I switch over to separate resistive baseboard heat to give it a break. David Roden, EVDL moderator & general lackey To reach me, don't reply to this message; I won't get it. Use my offlist address here : http://evdl.org/help/index.html#supt = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = When birds of a feather flock together, the usually don't pay much attention to the amount of crap that they drop. = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = _______________________________________________ Address messages to [email protected] No other addresses in TO and CC fields UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub ARCHIVE: http://www.evdl.org/archive/ LIST INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org
