The Homemade Heat Pump Manifesto

mejunkhound · 04-05-11, 04:54 PM

Congratualtions on 100k hits!

Neat thread. My first time here.

Glad to see a nice group of folks not intimidated by the so-called pros, nor inundated by the 'ha-ha' type of know-nothings untalented 'pros' - as exhibited in some of the early posts. probably more buried in the thread, which I have not read thru.

Happened by here as was posting about my DIY GSHP on a greenbuilding site and had fun throwing back the cr@p at retailers and salesmen who claim DIY HP is 'impossible'. It aint rocket science after all.

I built my GSHP from scratch for under $1000 -- $300 of that was for a new closeout copeland scroll, $70 for refrigerant (next one will be BBQ propane, another topic), $100 for welding rod, etc. to build a percussion drill rig on the back of my dozer, various other tidbits, etc.

Heat my 5300 sq ft house (another DIY project) with it totally.

HP Evaporator is tube in tube made from all surplus pipe (cleaning techniques a story all by themselves too) , condensor a salvaged 7-1/2T carrier coil, all homebuilt controls, etc.

Might retire this year, and will post some details as a how-to for others then when time available.

The $1000 DIY HP has a COP of 5.6 at 9.5 gpm water flow, I get 58,000 BTU/Hr output from a nominal 4T scroll compressor - trouble free operation since built in 2009.

Keep up the good work, there are only a few folks out of 100 who are willing to learn and do as you are, we need to keep encouraging others!

04-05-11, 04:54 PM	#11
mejunkhound Apprentice EcoRenovator Join Date: Apr 2011 Location: PNW Posts: 197 Thanks: 0 Thanked 47 Times in 31 Posts	Congratualtions on 100k hits! Neat thread. My first time here. Glad to see a nice group of folks not intimidated by the so-called pros, nor inundated by the 'ha-ha' type of know-nothings untalented 'pros' - as exhibited in some of the early posts. probably more buried in the thread, which I have not read thru. Happened by here as was posting about my DIY GSHP on a greenbuilding site and had fun throwing back the cr@p at retailers and salesmen who claim DIY HP is 'impossible'. It aint rocket science after all. I built my GSHP from scratch for under $1000 -- $300 of that was for a new closeout copeland scroll, $70 for refrigerant (next one will be BBQ propane, another topic), $100 for welding rod, etc. to build a percussion drill rig on the back of my dozer, various other tidbits, etc. Heat my 5300 sq ft house (another DIY project) with it totally. HP Evaporator is tube in tube made from all surplus pipe (cleaning techniques a story all by themselves too) , condensor a salvaged 7-1/2T carrier coil, all homebuilt controls, etc. Might retire this year, and will post some details as a how-to for others then when time available. The $1000 DIY HP has a COP of 5.6 at 9.5 gpm water flow, I get 58,000 BTU/Hr output from a nominal 4T scroll compressor - trouble free operation since built in 2009. Keep up the good work, there are only a few folks out of 100 who are willing to learn and do as you are, we need to keep encouraging others!