Why Proper AC Sizing Matters in Montreal
Selecting the optimal window air conditioner capacity not only ensures comfortable temperatures but also reduces electricity expenses in Greater Montreal’s humid summer climate.
Understanding Cooling Capacity (BTUs)
Cooling power is measured in British Thermal Units (BTUs) per hour. A higher BTU rating means more heat removal, but oversizing can lead to short cycling and higher utility bills. Undersizing, on the other hand, may leave your space feeling muggy.
Step-by-Step Sizing Process
1. Calculate Room Area
Measure the length and width of the room to determine square footage. Area (ft²) = length × width.
2. Assess Sunlight Exposure
If your windows face west or southwest or get intense sun, add 10% to the basic BTU recommendation. North-facing or shaded rooms can subtract 10%.
3. Evaluate Insulation
Rooms with poor insulation require roughly 15% more cooling power to compensate for heat gain.
4. Consider Occupancy
Add 600 BTUs for each person beyond two who regularly uses the room.
5. Account for Internal Heat Sources
In kitchens or spaces with heat-generating equipment, increase BTU capacity by about 4,000 for effective cooling.
6. Review Usage Patterns
If you only need to cool at night, you may reduce capacity by up to 30% since ambient temperatures are lower.
7. Note Ceiling Height
Rooms with ceilings over 9 feet need extra cooling power to offset the larger air volume.
8. Factor in Open Floor Plans
When adjoining areas share the cooling load, measure the total open space and size accordingly.
Units Dimensions & Installation Tips
Window AC models usually include adjustable side panels to fit most openings. Before purchasing, verify the chassis width, height, and depth with the manufacturer’s specifications. For professional installation and precise fitting, contact Climate Solutions in the Greater Montreal area.
Expert Recommendations from Climate Solutions
- Install a programmable thermostat to maintain consistent temperatures and reduce runtime.
- Seal gaps around the unit to prevent air leaks and improve efficiency.
- Arrange annual HVAC maintenance with Climate Solutions to keep your system running at peak performance.
