Air Source Heat Pump Water Heaters
In this presentation, Gary Klein shares important information about air source heat pump water heaters (HPWH), with particular attention paid to where the warm air comes ...
Primary-Secondary Pumping on a One-Pipe Hot Water Heating System
In this excerpt from his Classic Hydronics seminar, Dan Holohan explains how primary-secondary pumping works in a one-pipe hot water heating system. Dan talks about valves, circulators, flow rate, pressure drop, blending temperatures, and more.
Want to learn more? Read Dan Holohan’s book Classic Hydronics: How to Get the Most From Those Older Hot-Water Heating Systems.
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