Innovations in a 107-Year-Old Net Positive Victorian Retrofit

…the geothermal heat exchanger pre-heats water in a pre-heat tank for the domestic water heater. 3) Our water heater is driven by a heat pump which sucks heat from basement…

My Zero Energy Retrofit Beats my 401(k)

…pay for the heat pumps in about 9 years. That’s a return on investment of about 9% per year after tax. These heat pumps both heat and cool the house…

Hot water from the Sun for the 21st-Century

…with a standard 50-gallon electric water heater. That’s much cheaper than a thermal system, but it gets even better.   Heat Pump Water Heaters The real game changer has been…

The Future is Electric

heat pump will maintain a comfortable indoor temperature in both heating and cooling seasons. The same heat pump technology provides abundant hot water. An induction cooktop cooks faster, is easier…

Zero Energy Proves Profitable in Vacation Rental

…design can reduce the need for expensive mechanical systems. Our heating system consists of just two low-cost Panasonic Exterios XE mini-split heat pumps and one electric-resistance cove heater. The heat

Six Steps to Success with Heat Recovery Ventilation

…air by transferring warmth from the stream of outgoing air. A heat exchanger can capture between 70% and 95% of that heat to reduce the energy needed to heat incoming…

Products Used to Get to Zero

heater on today’s market. See Heat Pump Water Heaters in the ZEP Product Directory   Artic Cold Climate Heat Pump The Arctic Heat Pump is a cold climate system that…

Fresh Air Systems – Balanced Whole House Ventilation

…conventional ERV core with a heat pump. The units provide heating and cooling as well as ventilation, so they are fundamentally different from devices aimed mostly at providing fresh air…

Energy-Efficient Low-Income Apartments 

…or highly energy inefficient heating and cooling systems with highly energy-efficient heat pump HVAC systems.   The Right Heat Pump HVAC System There are many choices of heat pump HVAC…

Zero Energy Homes: Tunneling Through the Electrification Cost Barrier in Cold Climates

…climate zone 6) and 10 percent of the time in Duluth, Minnesota (representing climate zone 7). Heat pump water heaters (HPWH) also utilize electric resistance backup heat for when heat

The Many Benefits of All-Electric Design

heat pump water heater is $70 less per year to operate, which corresponds to a savings of about 40% compared to one of the most efficient gas water heaters. Additionally,…

Product Spotlight: Smart Energy Recovery Ventilation with CERV2

…freezing. The heat pump is used for energy recovery and fresh air conditioning in ventilation heating and cooling modes while in recirculation heating and cooling modes, the heat pump is…

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