Are there efficient in-slab radiant systems that also cool?
A client is getting bids from HVAC contractors to design/install heating & cooling systems for a 3100 SF single-level home located in the high desert climate of southern Utah (think Alburqurque, NM). The bids are quite high, perhaps due to the fact everyone says the client will need TWO complete systems; one to heat, one to cool. The bids all specify in-slab boiler-fed hydronic radiant heating coupled with a standard forced air furnace with a conventional AC unit for cooling (and I guess back-up heat). A friend keeps saying: “Screw that! Just use the radiant system tubing to cool by running cooled liquids thru tubing in summer!”
My Question: is it as simple as that!?!