... EVI Air Source Heat Pump 1.-25 DC low temp, EVI design 2.Cop to ... system can provide stable running in even -20 DC environment, avoid any antifreeze problem.Compare to the ... EVI technology importantly increase refrigerant flow of the main loop and outside evaporation enthalpy difference, brings 7% to ... low temp, -25 DC, split, CE, EN14511-2:2011, EN14511-2:2007, NFPAC, EURO-VENT, ENERGY-STAR, DOE,ETL) ...