Hot Water Heat Pump – use with circulator and pre-heat

Looking for any experience in using a HP HW heater in the following scenarios:1) With a HW circulation loop (on timer, motion sensor or other smart use trigger)2) With a… Looking for any experience in using a HP HW heater in the following scenarios:1) With a HW circulation loop (on timer, motion sensor or other smart use trigger)2) With a…Read MoreGreenBuildingAdvisor