Heat pump water heater / Guides

Slab-on-grade construction technical guide
Slab on Grade

Slab-on-grade technical guide

...water heater, air exchanger, water softener, septic pump, sulphur tank, central vac, etc. Slab-on-grade design: Given that you are committing a certain area of the main floor to mechanical systems, this is as good a time as any to plan some storage, and maximize the efficiency of that room. Along with some space ...

Earthship in Taos, New Mexico, shame they don't work in cold climates
Concept and design

Do Earthships work in cold climates?

...water heating. Rainwater is collected, stored in large plastic cisterns and filtered for residential use; waste water is treated on site and used for growing food. The south-facing wall is all windows and acts as a heat collector and greenhouse where food is produced all year. That's all great stuff and it seem...

Thermal batteries for passive solar design
Efficient home design

Thermal batteries: how to passively store heat

...water) that is warmed by heated coils from a solar collector. Through that same tank runs another coil that is extracting the heat to pump it through your radiant floor or whatever other heating distribution system you have. Specific Heat Capacity: If you take solid paraffin (heat capacity Cp = 2.5 kJ/kg·K and heat...