Introducing SlabHeat

Introducing SlabHeat^™.

SlabHeat expands upon our successful electric floor warming product lines. Designed as a robust, job site resistant cable, SlabHeat is an electric radiant system installed directly in concrete. A combination of strength, durability, and simplicity lies at the heart of SlabHeat. Engineered to provide room heating as well as floor warming for a wide range of applications, SlabHeat is the perfect solution for even the toughest heating project.

Why choose SlabHeat over a traditional hydronic radiant system?

One of SlabHeat’s benefits is the lack of a complicated mechanical room. With SlabHeat there is no need for a heat source such as a boiler; the cable is the heat source! For new construction, as well as remodel, trying to add a dedicated heat source can create its own set of challenges. Hydronic heat sources require a dedicated space, venting, power, and fuel. Hard piping is also needed to circulate the heated water. SlabHeat has none of these obstacles. With SlabHeat all that is required is to run the cable across the space and connect to the SunStat^® thermostat. Then, simply pull dedicated 120 VAC or 240 VAC power to the area to be heated. When using a SunStat thermostat, the rest is as easy as wiring a light switch.

Designing a SlabHeat system is much simpler than designing a typical hydronic radiant system. First, figure the gross square footage (wall to wall), then multiply that number by 90%. This square footage will be your heated area. The area to be heated will help determine if a 120 VAC or a 240 VAC system should be used. For a 120 VAC system this is approximately 115 square feet of heated floor area at 4” on center. For a 240 VAC system this is about 225 square feet of heated floor area at 4” on center. This is determined by the SunStat 15 amp limit. If larger areas are to be heated one of two things need to happen. Either add additional SunStat thermostats (one for each additional 115 or 225 square feet of heated area) or add SunStat Relays to the control strategy (one Relay for each additional 115 or 225 square foot of heated area).

SunStat Relays are specifically designed to work with the SunStat thermostat. Each Relay wires back to the SunStat thermostat and acts as an extension of the thermostat. A total of ten Relays can be daisy-chained off of a single SunStat thermostat. Refer to the SlabHeat installation manual for further details on setting up the SunStat or SunStat Relays.

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Christopher Campfield
Watts Radiant System Designer