... .8kw,5.5kw,8.5kw,10.5kw,13kw,17.5kw,21.5kw,25.5kw. *.Titanium Heater exchanger PVC. *.Eco-friendly gas R410A *.Lower ... noise level *.Famous brand compressor *.60Hz is available. * CE&RoHS approval.air source heat pump water heater vs series ...