r/geothermal is a subreddit with 9k members. The community frequently discusses geothermal, waterfurnace, energy, drilling, and heat pump.
A subreddit focused on both geothermal and geoexchange systems, primarily for residential heating and cooling (e.g. ground source heat pumps). Larger projects and other methods of using the earth for heat exchange are welcome, though less likely to spark broader discussion. All civil discussions aren't just welcome but wanted.
Popular Topics in r/geothermal
#1
Geothermal
191 posts
#2
Waterfurnace
39 posts
#3
Energy
26 posts
#4
Drilling
17 posts
#5
Heat Pump
15 posts
#6
System
14 posts
#7
Hvac
11 posts
#8
Cooling
10 posts
#9
Heat
8 posts
#10
Loop
7 posts
Member Growth in r/geothermal
Yearly
+2k members(25.8%)
About
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This page gives a focused view of r/geothermal, including current member size, discussion patterns, product reviews, and related communities to explore.
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Last updated: September 14, 2026