solar collectors for split systems 1.for 5 years warrany. 2.SRCC,CE,SOLAR KEYMARK approved. 11.OEM for solar collectors solar collectors for split ... systems1.for 5 years warrany. 2.SRCC,CE,SOLAR KEYMARK approved. 11.OEM for solar collectorsWorking principle:1) When the temperature of ... Wind stress:180km/hFreeze protection:-25 degree.Heat preservation:72Hours. solar collectors for split systems