Heated Floors

Carpet considerations

The advantages of energy efficiency combined with a distinctly comfortable heat source have made heated floors increasingly popular in many parts of the country.  Heated floors are also referred to as hydronic or “radiant-heated” floors.  While heated floor systems are often used under tile, marble, vinyl and wood floors, they can also be used under carpet — and actually have added benefits in this combination.  If you have heated floors or are considering having them installed in your home, you should keep a few things in mind.

Manufacturers of heated floor systems indicate that less thermally conductive floors, such as those covered with thick carpets, particularly with heavy cushions beneath, may require the use of hotter water.  This may preclude the use of water-to-water geothermal heat pumps, some solar systems and some waste heat recovery systems.  Regardless, most homeowners accept some efficiency reduction so that the additional benefits offered by carpet will be enjoyed.

With installations involving carpet and cushion, consideration must be given to the thermal resistance rating (R-value) of the carpet and padding.  Most floor systems manufacturers suggest a total maximum R-value for carpet and cushion not to exceed 4.0. With heated floors, lower pile carpet is better than higher pile carpet, and the absence of cushion is preferred.

» back to top