Air-to-Water Heat Pump & Ventilation Retrofit: A New Free Course Here’s the story of “Finally Fossil-Fuel Free: Air-to-Water Heat Pump & Ventilation Retrofit“, a new free course presented by Brian Just from the Vermont Energy Investment Corporation. His presentation is offered in partnership with the Northeast Sustainable Energy Association. Air-to-water… Continue reading “Air-to-Water Heat Pump & Ventilation Retrofit: A New Free Course”