RSHamilton @rshamilton@qoto.org

Heating water for potable use is the second largest demand for #energy in any structure with bedrooms and bathrooms. Most water heating systems in use today operate at 65%-85% efficiency. #heatpumpwaterheaters provide the same service while using ~25% of the energy (250%-300% efficiency) compared to any other method. A #HPWH system always includes hot water storage. In multifamily buildings, the hot water storage tanks are quite large; 800 gallons (3,028 liters) pairs with a 250,000btu/hr (73kW) HPWH. For Time of Use rate structures or #Demandresponse the HPWH can preheat using renewable energy during times of low grid demand, and remain off through the grid peaks. This combination of #efficiency and shiftable load provides massive #carbon emissions reductions and operational cost benefits to the occupants and the building owner.

This is a Piping and Instrumentation Diagram of a HPWH system.

#energytwitter #energymastodon

Picked up some gently used gear today at the ski swap. My first time purchasing new skis in 22 years. I've been riding my 22 YO Soloman TenTwentys hard. Time to turn them into a chair or something.