How to calculate the right BTU?
Wall AC power is measured in BTU (British Thermal Units). The general rule is about 30 BTU per square foot of area to cool.
- 9,000 BTU: for 250-350 sq ft (bedroom, studio)
- 12,000 BTU: for 400-550 sq ft (medium living room, master bedroom)
- 18,000 BTU: for 600-850 sq ft (large living room, open area)
2026 Brand comparison
Mitsubishi Electric: The Quebec standard for harsh winters. The Hyper-Heat series operates effectively down to -30°C. 12-year compressor warranty. Higher price but superior quality.
Daikin: Excellent choice, very reliable. The Emura series offers elegant design and performance to -25°C. 10-year parts warranty.
LG Dual Inverter: Great value for money. Performance to -15°C sufficient for most regions. 10-year compressor warranty.
AC Price Table — Quebec
Indicative price ranges for the Montreal area. Rates may vary by city, complexity and contractor.
| Service | Min | Max |
|---|---|---|
| Wall-mounted AC 9,000 BTU (unit + installation) | $1,500 | $3,000 |
| Wall-mounted AC 12,000 BTU (unit + installation) | $2,000 | $3,500 |
| Wall-mounted AC 18,000 BTU (unit + installation) | $2,500 | $4,500 |
| 2-zone multi-split system (unit + installation) | $4,500 | $8,000 |
Indicative ranges compiled by UrgencePlomberieQC.com, July 2026.
Frequently Asked Questions
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