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Furnace Repair & Maintenance in Oakville

TechnoTemp recommends a Merv 11 Filter for optimal efficiency. You can purchase M1-1056 Merv 11 Filters in a box of 3 for $90.00 in our store or online. We have the best pricing and are always well stocked as these are our number one filter in sales.

If you’re like most people, you probably don’t give your furnace much thought as long as it’s keeping you warm in the winter and cool in the summer. But in order to keep it working to its optimal performance — and help prevent a possible malfunction — you need to either change or clean your furnace filter on a regular basis. Sounds simple, but in reality, there are so many options for furnace filters that choosing the wrong one can do more damage to your furnace than good and could potentially cause your furnace to break down. A traditional forced-air furnace draws air in via return ducts, warms it over a heat exchanger then, with the help of a blower fan, pushes the heated air through a series of ducts that branch off into rooms throughout your home. The furnace runs until the temperature inside reaches your desired thermostat setting. (If you have whole home air conditioning the process is similar with the air being cooled in the summer by an outdoor compressor unit and a series of coils inside your furnace). The main purpose of a furnace filter is to protect the blower fan from all the dust, hair and other gunk the return duct pulls in. While it will also help the quality of your inside air (as it is removing contaminants from being recirculated), its job is not to actually clean your air as many people believe.

How filters are rated

Furnace filters are rated using the minimum efficiency reporting value (MERV). Merv ratings range from 1 to 16. The higher the rating the more particles the filter can remove. Higher rated filters allow less air to flow through though and can force your furnace to work harder and possibly malfunction. A MERV rating between eight and 11 is adequate for most homes. To be safe, you should check if your furnace manufacturer has a maximum MERV rating your model of the furnace can use.

Filter types

The most common type of furnace filter is the disposable pleated kind. These come in a range of standard sizes and ratings. Pleated filters are constructed out of paper and polyester and do a good job of filtering most household particles and allergens. The price of these filters varies from a couple of dollars all the way into the $30 – $40 range depending on the brand, size and rating of the filter. Pleated filters should be checked monthly for blockages and replaced on average every 90 days.

Disposable fibreglass filters are the cheapest filter on the market. They have an almost spider-web appearance and are most often blue in colour. They come in many standard sizes, but are generally more flimsy and have lower ratings than pleated filters. Due to their inferior quality, disposable fibreglass filters should be checked and replaced more frequently than pleated filters.