... level,small vibration Durable,Economical,High COP CE,RoHS approval Air source heat pump with DC inverter is a high tech heat pump which more and more ... /OFF type heat pump, and the quality will be much better at the same time. Our inverter air source heat pump as in following feature: High COP ... level.Easy to install or maintain. Package:1. whole set unit is packed nicely in a PE bag. 2. spare parts ...