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Recommended Air Conditioner Size |
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Bungalow |
Built after year 1980 |
Built before year 1980 |
Up to 1,200 sq-ft |
1.5-ton |
up to 2-ton |
1,200 to 1,500 sq-ft |
2-ton |
2-ton |
1,500 to 1,800 sq-ft |
2-ton |
up to 2.5-ton |
1,800 to 2,500 sq-ft |
up to 2.5-ton |
2.5 to 3-ton |
2,500 to 3,500 sq-ft |
3 to 3.5-ton |
3.5 to 4-ton |
Semi-Detached 2-Storey Home |
Built after year 1980 |
Built before year 1980 |
Up to 1,500 sq-ft |
1.5-ton |
up to 2-ton |
1,500 to 1,800 sq-ft |
up to 2-ton |
2-ton |
1,800 to 2,200 sq-ft |
2-ton |
up to 2.5-ton |
2,200 to 3,000 sq-ft |
2.5-ton |
2.5 to 3-ton |
Detached 2-Storey Home |
Built after year 1980 |
Built before year 1980 |
Up to 1,300 sq-ft |
1.5-ton |
up to 2-ton |
1,300 to 1,700 sq-ft |
1.5-ton |
2-ton |
1,700 to 2,500 sq-ft |
2 to 2.5-ton |
2.5-ton |
2,500 to 3,500 sq-ft |
2.5 to 3-ton |
3 to 3.5-ton |
3,500 to 4,500 sq-ft |
3.5 to 4-ton |
4 to 5-ton |
Ottawa East | ||
K1B | Ottawa Center | |
K1C | K1R | |
K1E | K1S | |
K1G | K1X | |
K1H | K1Y | Ottawa West |
K1J | K2A | K1T |
K1K | K2B | K1V |
K1L | K2C | K2H |
K1M | K2E | K2J |
K1N | K2G | K2K |
K1T | K2P | K2L |
K1V | K4K | K2M |
K1W | K4M | K2R |
K4A | K4P | K2S |
Size of Cabin Filter depends on volume flow of the Blower Motor as shown below. Volume flow is usually measured in Cubic Feet per Minute (CFM). |
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Furnace Max Air Flow: |
Minimum Filter Cabin Size |
Recommended Filter Cabin Size |
up to 800 CFM |
16 × 25 × 1 |
16 × 25 × 5 |
up to 1200 CFM |
16 × 25 × 1 |
16 × 25 × 5 |
up to 1600 CFM |
20 × 25 ×5 |
20 × 25 × 5 |
up to 2000 CFM |
20 × 25 × 5 |
20 × 25 × 5 |
5” Media Air Cleaner and 1” Filter Compared |
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5” Media Air Cleaner |
1” Filter |
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MERV (ability to capture particles) |
MERV 11 |
MERV 8 |
MPR (ability to capture particles) |
1200 |
300 |
Restricts air flow |
low |
high |
Replacing time |
Every 6 months |
Every 2 months |
Effect on furnace efficiency |
Increases furnace efficiency |
Reduces furnace efficiency |
Price |
$49/filter → $98/year |
$19/filter → $114/year |
ECM, DC motor furnace |
Increases the efficiency and life-span of the furnace |
Furnace not working well, more service call, Reduces efficiency |
Undersized filter will result in: