Heat pump performance has improved a lot over the last couple decades mainly due to new refrigerants that permit operation to below zero F temperatures. The Fujitsu models for example operate down to -5F:
https://www.johnstonesupply.com/storefront/template-resources/images/Fujitsu_MiniSplit_SellSheets.pdf I have seen others that operate down to -20F. COP values are typically only around 1.5 at those temperatures but still much better than resistive heating. Iircc COP is in the 2.x range for temperatures in the teens. -- View this message in context: http://electric-vehicle-discussion-list.413529.n4.nabble.com/EV-Heatpump-Retrofits-tp4679328p4679343.html Sent from the Electric Vehicle Discussion List mailing list archive at Nabble.com. _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
