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Retrofit radiant floor heating
Murf;
One of the reasons that I pulled back from the under floor retro fit systems (the area I was considering has marble tile) Is that I would dry out the plywood. Depending on the type of wood on the floor the system could really do some damage.
I have room for the heat exchanger on the heat pump and therefore was considering this system. The old house had it set up this way and it was comfortable.
Ken;
I have the 24 foot sealings also but have a fan at the top. I don't find the room much different than the rest of the house.
The pellet stoves have improved yearly. The unit I have is far less effecient than the new system. I have my system in the basement and run it through the wall as it is a walk out on that side. There are a number of options.
The propane is an option although the only propane I have is for the gas stove top. I really did not want a large tank just for occasional work.
My heat pump also heats the domestic hot water and therefore have two separate tanks. As the heat pump heats the water most of the time I have only electric tank to keep the second tank warm after heating.
Eric
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Retrofit radiant floor heating
Eric, I've heard conflicting stories of problems with underfloor radiant heat on wood floors. It's confusing and hard to know if there's a legitimate problem or not. I figure that heating the floor to some moderate temperature, like 60-65 degrees, and using the heatpump to make up the difference may minimize any problems.
We also have a ceiling fan on a 10-foot downrod in our vaulted area. The fan helps a lot but there's still a 2-3 degree temperature gradiant floor-to-ceiling. Our heatpump also has a desuperheater to provide hot water but I turn that pump off in the winter since heatpumps heating performance is already marginal. We use propane for the cooktop, water heater, dryer, generator, and have it stubbed out to our fireplaces and outdoor future hottub.
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Retrofit radiant floor heating
Mean ground temperature is 60 degrees here so the basement is always that temperature anyways. With the pellet stove in the basement this may make the difference in the front room. I have seen little difference in the upstair and down stairs temp in the winter or summer. I have the fan on a 4 ft rod is it possible that you are not pulling the air from the ceiling properly?
I did not go for the superdeheat on the geothermal. It only heats the tank when it is on.
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Retrofit radiant floor heating
I'm still interested in de-bugging that Geo if you are. Check today's e-mail for shorter list of questions.
I admit to tunnel vision on the bigger picture. Although I am not a fan of any unvented heater, I agree that unvented logs or even a wall heater would do well for occasional use. The wall heater could go on an interior wall. Just not in small areas or bedrooms (check local codes...). I would also add battery powered carbon monoxide detectors as added safety if you don't already have them.
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Retrofit radiant floor heating
We have 7-8 sf of return air vents at the peak of our vault so that pulls hot air from the vault ceiling and recirculates it. I know that works 'cause I have to vacuum the registers all the time  We run with continuous fan to even out the temps and better filter the air (wifes allergies).
How do you heat the tank without desuperheat?
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Retrofit radiant floor heating
I used the Nordic system it heat but does not turn on only to heat the tank. When the system is on it heats it does not come on just to heat the tank.
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Gas Generator Weather Protecti
01-05-2004, 12:20 
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