... , the system can provide stable running in even -20 DC environment, avoid any antifreeze problem.Compare to the common series ... Expansion Valve3. Four-way valve: Japan Saglnomiya4. Extra large evaporator5. Heat exchanger: Plate type heat exchanger6. LCD controller.Multi Protection1. ... } ); } )(); heat pump(evi air to water,low temp, -25 DC, split, CE, EN14511-2:2011, EN14511-2:2007, NFPAC, EURO ...