Seems like there's a lot missing in this regard.  HVAC/Plumbing is about an ocean deep and I only see Solar and Geothermal as forum headers.  Both have great applications but are niche fields.

My specific search here is for reference material for sand/gravel heat sinks (also known as thermal mass).  In which forum should this go?

DJL
Mech Engineer

DJL,

Until we add additional forums, please post your inquiry in the Residential Forum.