In Slab Floor Heating Detail

Radiant heat is actually an old technology.

In slab floor heating detail.

In slab hydronic radiant assemblies along with downsized forced air systems are gaining popularity as a means of optimizing thermal comfort while lowering energy use. Least 50 btu s per foot in a slab on grade installation and 40 btu s per foot in a floor joist application. Typically designed in conjunction radiant cooling systems circulate colder water through the same network of pipes where warmer water circulates during the heating season. Slab insulation methods calculating heat loss tubing options system options and much more all written in easy to understand language for the homeowner with pictures and diagrams.

First two digits and mat length in ft. Enjoy the simplicity of electric indoor floor heating and turn cold concrete floors into a welcoming comfort. After reading this manual you should have a clearer understanding. Insulation of decreasing thickness is placed from the perimeter of the slab in towards the middle of the building.

It is common to use 2 thick extruded polystyrene for 4 ft and then 1 thick for another 4 ft and then no insulation at all under the center of the slab. Since the slab will be approximately 5 degrees warmer than the room temperature a 75 degree slab is quite common. The most cost effective system for medium to larger homes is hydronic since the amount of power it would take to heat a whole home with electric would be substantial. Operating a slabheat system couldn t be easier.

Third and fourth digits for slab heating mat cable length in ft. There s two basic types of concrete floor heating hydronic and electric. The second section gets down to the nitty gritty details of actual radiant floor installations. Larger sized slab on grade buildings should use this detail.

For example radiant floor heat has more even floor to ceiling temperatures than other. There are many approaches to insulating a radiant slab but the detail at right shows a frequently used method. Aaaa wshm for slab heating mat wshc for slab heating cable bbb operating voltage available in 120v and 240v cccc mat width in ft. In slab heating does not include on floor heating systems where a wire heating mat or similar is laid over sheet flooring.

Typical requirement suspended concrete slabs above a subfloor not above a habitable room or another dwelling with an in slab heating system require under slab and slab edge insulation. If you are new to radiant heat our design and construction manual is a must read this manual provides a wealth of general information about radiant heat. How does radiant heat work. For slab heat cable the available lengths of slab heating mats are shown in appendix a.