From Ventilation Service
Buildings in Canada face long and cold winters that require lots of heating. Solar thermal systems are amongst the most adopted renewable energy technologies because they help reduce the cost of heating during winter. Solar thermal air heating systems are simple, effective, and essentially maintenance-free, as the only moving parts are the dampers that bypass the system in summer. These systems significantly offset fossil fuel use by other heating systems.
How it works
- Wall Collectors - A panel collector (specialized cladding) is spaced on the exterior surface of the south, east or west wall of a building; capturing solar heat throughout the day. Thousands of tiny perforations in the cladding allow fresh air to pass through on the way to the building HVAC system. As the air passes through these holes, it collects heat as it transfers through the cladding. These systems even function as a thermal jacket at night by helping retain the heat that would otherwise freely escape from the building through conduction or convection heat loss.
- Roof Collectors - In applications where wall collectors are impractical or not available, flat roof collectors can be used to preheat ventilation air. Here the collectors are arranged in a series of rows on the roof and connected to the intake air.
- Solar PV/T – Solar Photovoltaic & Thermal Systems (PV/T) - Solar thermal systems provide perfect racking on which to place solar photovoltaic (PV) panels allowing a client to benefit by collecting both free heat and electricity from the sun. Solar PV/T systems act symbiotically to improve on the weaknesses of traditional PV systems (at peak sun exposure PV solar modules tend to overheat, losing efficiency) even as they collect heat. By having a solar thermal system underneath, the PV panels maintain a lower, more even temperature increasing their collection efficiency. This contributes to a significantly better ROI, and allows efficient solar energy use on any building.
- A solar thermal air heating system can reduce that heating bill by at least 25%, providing an average return on investment of 4-8 years
- Various incentives exist from the federal, provincial governments offering up to 25% off the cost of installation
- Earn up to 6 points towards LEED certification
- Systems are maintenance free and come in multiple colours
- Your company can receive positive publicity as a responsible corporate citizen by employing a renewable energy system