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Radiant heating system in Quebec

Space heating represents approximately 60% of utility bills of a building in Quebec. Traditionnaly, space heating is done either by process of convection of radiation.

Convection:

Generally by a system using a duct system or electrical baseboards. Happens when air, by contact of a heating element, warms up and rises, drawing colder air to move towards the heating element and creating a movement of heated air through a space.

Altough generally low-cost, these systems are not very efficient and don’t offer much comfort to occupants.
Displaced air can create discomfort by creating colder zones and warmer zones within a space.
Also by displacing air, convection heating also displaces pollutants and dusts particules throughout the room.

Radiant:

Radiant heating can be explained by the transfer of heat through hot thermal mass or bodies to colder mass or bodies. This process does not need air movement. It is done solely though radiation from one body to another. We can generally describe it by the sensation of heat felt when approaching a outdoor fireplace: you can feel the heat of the fire veryefficiently altough the outside air might be much colder still. Occupants of a radiant heated space will feel warmth without any of the uncomfortable consequances of convection heating.

Radiant Floors:

Radiant floor utilize this technique through piping installed in the floors where hot water circulates.

 

Advantages:

Advantages of this type of heating are numerous:

 

Heat distribution:

Heat production:

 

Radiant heating allows for great flexibility of boilers to heat the water ecologically and efficiently:

Components:

Piping:

 

Pex for heating with an oxygen barrier must be used in this application.
Quality of piping and component related will make a very important difference in the long term performances of your system.
Repairs and service calls will always cost more than the money saved on buying cheaper product on installation.

Boilers:

 

The unit where water gets heated. Different caracteristics and models are available. Type of combustible, power, outdoor reset temperature, modulating capacities etc.

Manifold:

 

They are used to transfer and dispatch the heated water towards zones to be heated and return water to the boiler. Pumps and zone valves will be used with the manifolds to direct water circulation as needed.

Thermostats:

 

They control the room temperature by operating pumps and zones valves according to the set room temperature. Many models and features allows for comfort and control over the system and the occupants.

Life expectancy of the radiant heating system:

With a well designed and planned system, a radiant heating system will certainly have a life expectancy equal to the space in which it is installed.

Estimated cost:

We can generally estimate the installation cost to be around 5-6$/ sq. ft. of heated surface.
These cost will vary according to factors like the boiler size, number of separate zones, type quatity of installed thermostats etc.

Sizing:

The quantity of heat necessary to adequately heat a space will vary with every space to be heated. This is why it is very important to perform adequate calculation and verification before installation in order to properly size the radian heating system. Rule of themb generally do not apply when upgrading from a convection system to a radiant system. The last one requiring generally less energy to heat a space due to increase efficiency in the boiler and distribution.

We use state-of-the-art software to perform heat-loss calculations of a building which allows us to determine exactly how much heat is needed. Once this step is done, we can then draw on plans the exact location of piping for easy installation of the system without fail. This allows for trouble-free installation by the installation teams, experienced or not.




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