02:57PM | 11/18/99
Member Since: 11/17/99
1 lifetime posts
I want to install a radiant floor heating system for the 1st floor of an addition of my house (approx. 700 SQF). The installation should be done from underneath (crawlspace) by putting the heating elements between the joists. I am not sure if I should go for an electric or a hydronic system. What are the pros and cons ? How efficient is an electronic system for that size ?

I don't necessarily have to shut down the current forced air system completely, but I would like to have more than just a "floor warming" system.

All input is greatly appreciated.


09:38AM | 03/11/08
Member Since: 03/10/08
2 lifetime posts
Electric floor heating is most likely the right solution to warm a 700 sq ft area (only about 400-600 sq ft will actually be heated). Hydronic systems are typically used for whole-house systems, although you may want to get a quote from a hydronic manufacturer just to compare (700 sqft is still a large size space and you may find hydronic systems to be a competitive solution, even after factoring in the higher installation costs of a hydronic system).

To select an electric floor heating optionn that will work as a primary heat source, make sure you choose a system rated at 15 watts per square foot. Some systems are only rated at 10 or 12 watts per square foot.

Our Tempzone systems ( are rated at 15 watts.

A 15 watts system will work very well as a heating solution, although you need to make sure that you're not installing it over a cold cement slab that will suck the heat down. Additional insulation may be needed, and you should talk to your floor heating manufacturer about specifics.

WarmlyYours provides heat loss calculations and will tell you how many square feet need to be heated for primary heat.

Hope this helps,


Click to reply button
Inspiration banner


Post a reply as Anonymous

Photo must be in JPG, GIF or PNG format and less than 5MB.

Reply choose button


Post new button or Login button

To test the boundaries of small-footprint living, interior designer Jessica Helgerson moved her family to a 540-square-foo... Filling an underutilized area beneath the stairs is a smart way to save space. Doing so with a stash of wood, however, is ... The Audubon Society inspired wallpaper in this Adirondack-styled mudroom will get you in the outdoor mood. Grab your coat ... Chalkboard paint opens up endless possibilities for customizing your dresser time and time again. Use chalk to label the c... A fireplace in the bathroom creates the ultimate setting for relaxation. Homeowners often choose electric or gas over wood... This roomy boot tray made from punched metal stands up to all the elements. Station it in your mudroom or at your back doo... There’s nothing like a new set of cabinet hardware to refresh a room. The possibilities are endless: Go modern, rustic, or... FLOR tiles are an affordable way to customize a carpeted floor covering for any space. Make anything from runners to wall-... Chalkboard paint features prominently in this elegant yet unpretentious headboard design. Add a new message daily to reflec... Salvaged boards in varying widths and colors make up the dramatic accent wall in this attic space. The high-gloss white of... The indecisive homeowner need not fret over choosing one (or even two) cabinet colors. The kitchen cabinets in this artist... Incorporate nature into your lighting scheme by securing a dead tree in a concrete mold and draping your pendant lamp from... Simple and striking, a couple of pieces of "lovingly used" furniture creates a special kind of charm. A weathered chair fo... First dress up your metal shelves with a coat of paint in an accent color that complements your kitchen decor. Then arrang... Dark wood shelving and a matching upholstered bench keep this closet sleek and refined. The large window brightens the sub...
Follow banner a
Newsletter icon Flipboard glossy Facebook Twitter Pinterest Youtube Rss icon