Dan Wildenhaus
Company name: Center for Energy and Environment
Position: Senior Technical Manager

As a Technical Advisor, trainer, and consultant for residential, multifamily, and small business programs, Dan has become completely immersed in the discussion of what is required to create High-Performance Buildings and the technologies that operate within them. After completing his bachelor’s degree at the Evergreen State College, with a focus on Energy Studies, Dan has developed over 29 years of experience, 15 of them working directly for a contractor, performing energy audits and Ratings, weatherization and HVAC repairs, consulting, and analysis for private clients in both New Construction and the existing buildings market. Almost 15 years ago, Dan transitioned to the consulting side of the business, working with program implementation companies and finding a home at the Center for Energy and Environment. Dan currently provides Decarbonization and HVAC consultation, technical management, market channel development, and training and presentation services for a variety of programs across the country.

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Tech Tips written:

Upgrading Time & Temperature Defrost with Demand Defrost for Heat Pumps
Since heat pumps work by extracting heat from the outdoors to bring it inside, the outdoor coil will almost surely freeze up. To mitigate the freezing, heat pumps enter a defrost cycle in which they run in cooling mode to send hot, high-pressure refrigerant back through the outdoor coil and melt the ice. While the […]
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Coil Temp Sensors: Thermostats vs. Thermistors
‘Tis heating season once again. It’s getting colder outside, and the heat pumps are starting to frost up outdoors. The defrost cycle helps get rid of the frost, and there are a few different ways we can do that; the methods themselves may differ between systems (time & temperature vs. demand defrost), as may the […]
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Cabinet Leaks in Air Handlers & Fan Coils
When we think of air leakage, a few common scenarios probably come to mind: disconnected ducts at connections, poorly sealed connections, and air leakage around vents are ones we’ve mentioned quite a bit in tech tips and videos over the years. However, there are a few that we haven’t really talked about, particularly for fan […]
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