Happy Turkeyday to all the \"Wallies\", and a question

BillW@honeywell

I had a question come up yesterday, and I was wondering if any of the industry's best who visit this website had any real-world experience with using ground source heat pumps to power in-floor radiant heat systems. This question was prompted by a radio talk show I heard yesterday, featuring a professor from the University of Oklahoma, who mentioned such systems, and I wondered if anyone here had installed one. Thanks in advance.

Paul Rohrs_4

We have done several

and I think they really do well. My only concern as with all equipment is how long will the unit last.

We have done several jobs and of course I am partial to outdoor reset temps for radiant. I am not a huge fan of 3-way proportional mixing but I think it is more effective in this application than injection mixing. Again, we can turn off boiler protection and enjoy some real energy savings. I don't recall what the COP was on this unit but it was a FHP model WP072. We know that Entering Water Temp (EWT) is key to how many BTU's we can reject into the buffer tank.


Regards,

PR

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Paul Rohrs_4

Picx

Regards,

PR

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[Deleted User]

Six

We've done 6 and have about that many on the dwg board. Attention MUST be paid to tube density, r values over the radiator etc. You have a max temp of availabiliyt of 115 degrees F. Beyond that, it's a losing proposition.

The homes we've done vary between a 3,000 tri level to a 15,000 square foot mansion.

We're now offering a split and mix od Geo for AC, and shoulder season heating, and high efficiency condensing boilers. They get the best of both worlds, and they call the shots on how expensive and efficient it is.

I'll be doing it in my own home soon.

ME