Is it worth adding a hot water recirculation pump to a heat pump water heater?
Adding a recirc pump to HPWHs has a tradeoff: shorter hot water wait times at the expense of energy savings.
When considering whether to add a hot water recirculation pump to a new heat pump water heater, there are several factors to weigh:
Efficiency Considerations
- Energy Consumption: It is generally not recommended to add a recirculation pump to heat pump water heaters because they can significantly increase energy consumption. This is due to the way recirculation pumps operate, which can lead to higher energy usage compared to systems without them.
Benefits of Recirculation Pumps
- Hot Water Availability: Recirculation pumps can provide quicker access to hot water at faucets and fixtures, reducing wait times. This can be particularly beneficial in larger homes or where the distance from the water heater to the tap is significant.
Recommendations
- Usage Monitoring: If a recirculation pump is installed, it is advisable to choose a model that includes built-in temperature sensors and usage monitors. These features can help optimize the operation of the pump, ensuring it runs only when necessary, thereby mitigating some of the energy consumption concerns.
Conclusion
While adding a hot water recirculation pump can improve hot water access, it is essential to consider the potential increase in energy usage associated with heat pump water heaters. Evaluating the specific needs of your household and consulting with professionals can help determine the best course of action.