... -freezing, more suitable in cold areas, Fast start up on cloudy or rainy weather.4. Water does not ... 6 bar pressure, P/T safety valve, heating element, magnesium bar, heat exchange copper coils) 3. Working station(expansion vessel, circulation pump ... prefered,CFR and CIF acceptable Active solar water heater which approved by CSA,Solar keymark,SRCC,En12975 ,suitable for Europe and North America market