EVI Air Source Heat Pump 1.-25 DC low temp, EVI design 2.Cop to 4.8, 410A ... . Thus, the system can provide stable running in even -20 DC environment, avoid any antifreeze problem.Compare to the common series ... ': aBigImageSrc } ); } )(); heat pump(evi air to water,low temp, -25 DC, split, CE, EN14511-2:2011, EN14511-2:2007, NFPAC, EURO ...