Tag: underfloor heating

In Floor Heating Insulation Boards – Why Use Them? - April 11, 2014 by Dave Mckiever

Why In Floor Heating Insulation Boards from Warmup are a great investment.

Warmup Insulation Board - 500x500

Consumers are actively encouraged to insulate their homes as this leads to energy savings. While not always ‘required’, insulating is almost always ‘better’. That is why Warmup, the only Primary Heating Radiant Electric supplier is actively promoting and delivering insulation boards on many of its jobs. Installing the heaters on top of an insulation board can bring significant savings as it improves the heat up time of the heating system and results in lower energy bills and energy usage.

Facts:

  • Boards replace cement boards: no dual expense needed. However, they are not aimed at resolving non-structural floors or compensate for excessive deflection.
  • Boards are ¼” thick
  • They act as a 92% thermal break: that means that only 8% of the heat can be “lost” downwards.
    • Up to 25% of the heat is lost over ¾” plywood
    • Up to 67% of the heat is lost over concrete slabs

Energy efficiency: less heat up time

The reduced heat up time is the main source for energy savings when using under floor heating insulation boards.

The insulation boards reflect the heat upwards into the flooring material and stop the heat from absorbing and escaping to the sub floor. The boards provide a high thermal barrier to cold rising from the subfloor, helping the floor to keep warm even when the desired room temperature has been achieved.

The boards, made from waterproof extruded polystyrene, have a high thermal insulation property. Also, the heat up period for a floor to reach the desired temperature can be cut from as much as 2.5 hours down to just 20 minutes. This means that the energy required by the heating system is required for shorter periods, in our tests, about 78% less time “on.”

Insulation board - heat up time chart

Cost reduction: less heat required

Another important source of savings, both on materials and in consumption costs, is the reduced amount of wattage required to achieve desirable temperatures. When you need to compensate for a drafty crawl space or a cold basement slab, you need to oversize the heater (more cable, more watts). When the heat loss is reduced (insulation boards), less material and cable is required. In the example of the NADWS cable system from Warmup, you can widen the spacing from 2-1/2” or 3” up to 4” spacing. This can lead to 30% to 40% savings on materials alone. This is especially valuable for modern installations powered by solar systems, or in remodels where the supply power is limited.

Design Advantage

Warmup Insulation Boards are only ¼ “thick.  This reduces the impact on your floor levels. They are 100% watertight, ideal for “wet” areas, and cut with a simple utility knife.

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