Quote:
Originally Posted by stevehull
BBP,
Here in central Oklahoma we have about 3600 heating degree days and 1800 cooling degree days. Low low heat design temp is about 0 F and 100 is the high cool limit.
So we need both. Too humid to cool floors as condensation issues when dewpoint > air temp.
Pollen is also real high here (almost year round) so pleated high efficiency (98% arrestance at 10 microns) filters on a low CFM air handler do a great job on that.
Steve
Steve
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You can get some sensible cooling with radiant floor. You take the return water off a 3 row coil with a low approach temp, and run it to the radiant. If needed, you can still add a mixing valve to make sure the water stays over 55-60F, especially in kitchen and bathrooms. It will only be a fraction of your capacity, but it reduces drafts.
But then you can save but reducing air handler and ductwork size to a minimum, mainly just for fresh air and air movement. A high velocity system might work well for this.
Further, the best set-up for water to water geo, is ideally to have a single loop between hot water, chilled water and ground loop. Then you simply pump to each loop as needed. But I'm not aware of any residential companies that are doing this. The advantage is precise humidity control and if combined with a small fluid cooler and solar, you don't need nearly as much ground loop capacity.