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  • Mission Statement
  • Heating & Cooling Rebate Ontario Power Authority

- INSPECTIONS , INSTALLATIONS AND REPAIRS
- Air purification systems
             - Electronic AIR CLEANERS
             - HEPA FILTRATION SYSTEMS
             - hEAT RECOVERY VENTILATORS             
             - ULTRA-VIOLET AIR PURIFICATION SYSTEMS
- exhaust fans
- HUMIDIFICATION

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 This is dirt that has passed through or around the furnace filter.

Not all service technicians will clean the blower fan , but , as you

can clearly see this would be appreciated. A clean fan also works

 more efficiently. This dirt can also be thrown up and into the

secondary heat exchanger , plugging it and not allowing the air

to flow through.  Low air flow can be responsible for an over-heat situation

in the winter or a frozen coil during Air Conditioning season. 






 The blower fan is responsible for the push , to supply air delivery to the rooms attached to the duct system.

 Equally important is the pull that the fan creates , returning air back to the furnace.

This is a balancing act , as air cannot be pushed into a room without also removing some.   If the supply registers

or return grills are blocked or closed ( covered by furniture , etc ) the effect will be reduced heating/cooling in that room.  

Also to be considered is the fact that duct systems are usually not installed leak free. Trade publications have given

statistics in the 20-40% leakage range in many existing homes. Two story homes suffer the effects of leaky ducts

more because, with reduced air flow and trying to push cold air up against gravity, the system struggles.

Leakage at or close to the furnace will cause the most reduction in the push/pull cycle. 

Experience has taught me that a sealed duct system ( as designed ) and installed with the best of installation 

practices will more likely provide even air flow and comfort to all ducted rooms.     



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BLOWER FAN REMOVED AND CLEANED
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