Is Radiant Floor Heating Right for You?
WHAT IS RADIANT FLOOR HEATING
There are 3 types of radiant floor heating:
air,
water or ‘hydronic’, and
electric.
The most efficient of the 3 is hydronic, where water is heated by a boiler and travels through pipes laid under the floor.
Water retains heat well, (better than air) and is cheaper and more efficient than electric floor heating. This article focuses on hydronic radiant floor heating.
CONSIDERATIONS
Very Efficient Heating when installed in a concrete slab it leverages the thermal mass of concrete to distribute and retain heat evenly
Practical heating solution Particularly in colder climates when heating is necessary all-day long. Heating can be controlled in zones.
Initial costs Homeowners must weigh the initial costs against the long-term benefits (~CDN$10 - 25/sqft).
Slow Heating Response Especially in concrete
Choice of flooring type matters The choice of floor finishes can significantly impact thermal efficiency, making careful planning essential.
INSTALLATION METHOD IN CONCRETE SLABS
Insulation A layer of rigid foam insulation is placed below the slab to prevent heat loss into the ground.
Vapour Barrier A polyethylene vapour barrier is typically installed to protect the system from moisture
Hydronic System Layout Flexible tubing (PEX or similar) is laid in loops across the surface of the sub-base and secured.
Pouring the Concrete Concrete is poured directly over the heating system, fully embedding it within the slab.
Connection to Heat Source For hydronic systems, tubing is connected to a boiler or water heater with a pump to circulate heated water.
ADVANTAGES
Even Heat Distribution Warmth is consistent throughout the space, eliminating cold spots.
Energy Efficiency Energy waste is reduced by providing heat directly where it's needed and when.
Silent Operation Unlike forced air systems, in-floor heating operates quietly.
Comfort Heat radiates evenly, providing a warm floor underfoot.
Better Air Quality As it does not rely on air circulation, there is a reduction of allergens and dust in the air.
DISADVANTAGES
High Initial Cost Installation costs are higher compared to traditional heating systems.
Slow Response Time Heating up takes longer than forced air heating due to the thermal mass to be heated, particularly true when installed in concrete slabs.
Potential for Repair Difficulties Repairing embedded systems can be challenging and costly so make sure it’s installed professionally
Regular Maintenance andProper Installation Routine checks on boiler andfor leaks and efficiency
CONSIDER IMPLICATIONS OF DIFFERENT FLOORING OPTIONS
Polished Concrete Offers a sleek, modern look, are durable and excellent for heat conductivity.
Tiling Conduct and retain heat well.
Engineered Wood Can be installed over radiant heating if rated for such use but may slightly insulate heat.
Laminate Flooring Cost-effective and heat-compatible if specified for in-floor heating.
Vinyl Flooring Durable and available in a wide range of designs but must be heat-rated to avoid warping.
Carpeting Compatible with in-floor heating if used with thin, dense carpet and heat-conductive underlay, though it reduces efficiency.