Willdan’s GK-12 Program, which has been effectively implementing heat pump water heaters at municipal agencies, can now provide low-cost heat pump water heater (HPWH) retrofits at K-12 Local Education Agencies (LEAs). LEAs such as High School and Unified school districts with gyms and pools are the top priority due to cost effectiveness of these projects, however this isn’t a requirement. Other potential projects, ranked by effectiveness behind gyms and pools, include:
To improve overall cost effectiveness it is beneficial to explore where HPWH retrofits can be coupled with other energy efficiency projects at LEAs. However, HPWH retrofits at elementary school districts and districts without gyms or pools will generally be more challenging to pencil out. These LEAs can still take advantage of other GK-12 Program offerings, some of which we have highlighted in previous blog posts (see here).
HPWHs take advantage of the same technology found in your refrigerator, using electricity and refrigerants to move heat from one space to another. In a fridge, heat is removed from inside to keep perishable foods cold. In a HPWH system, heat is pulled from the ambient air around the tank to the water inside, and provides hot water the same way that a typical natural gas or electric resistance water heater does. To put it simply, though this equipment may be new, the mechanisms and technology utilized are very familiar, and retrofits are usually a simple process. The result is that a HPWH can be two to three times more efficient than conventional electric resistance water heaters.
Besides the potential for energy cost savings, there are multiple other reasons to consider HPWH retrofits:
If your LEA is interested in pursuing this opportunity, please don’t hesitate to reach out to us to get started. You can either email us at snew@sierrabusiness.org or call 530-214-3836. We hope to hear from you soon!
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