How to Choose the Right HVAC System for Your Home

For most London homes with existing ductwork, a central forced-air system with a 96% AFUE gas furnace and 16 SEER AC offers the best value. For homes without ducts, ductless mini-splits are excellent. Heat pumps are increasingly popular, especially with the OHRSP rebate (up to $7,500). Many homeowners now choose hybrid systems — a heat pump paired with a gas furnace for maximum efficiency in our climate.

SEER (Seasonal Energy Efficiency Ratio) measures air conditioner cooling efficiency — higher SEER means lower cooling costs. AFUE (Annual Fuel Utilization Efficiency) measures furnace heating efficiency — 96% AFUE means 96% of fuel converts to heat. For London homes, choose 16 SEER or higher for AC, and 96% AFUE or higher for furnaces. Heat pumps have both SEER (cooling) and HSPF (heating) ratings.

Proper sizing requires a professional load calculation (Manual J) that considers square footage, insulation, windows, air sealing, orientation, and occupancy. A 1,500-2,000 sq ft home typically needs 60,000-80,000 BTU furnace and 2-3 ton AC. Never guess — an incorrectly sized system wastes energy, fails prematurely, and won't keep you comfortable. We include a free load calculation with every quote.

Yes, modern cold-climate heat pumps work efficiently down to -25°C. They provide both heating and cooling in one system. With the OHRSP rebate (up to $7,500) and Enbridge top-up, heat pumps are very affordable. However, most London homeowners choose a hybrid system — a heat pump for moderate temperatures (above -10°C) and a gas furnace backup for extreme cold. This maximizes efficiency and savings year-round.

A complete HVAC system (furnace + AC) costs $6,500-$12,000 installed. A high-efficiency furnace alone: $3,400-$5,500. A central AC alone: $3,500-$6,500. A ductless mini-split: $3,500-$8,000 depending on zones. A heat pump: $5,000-$12,000. Rebates can reduce costs by $650-$7,500. We provide free, no-obligation quotes with all rebates included.

A ductless mini-split is a heating and cooling system without ductwork — an indoor head unit connects to an outdoor compressor. Ideal for homes without existing ducts, additions, garages, or homes with hydronic (radiator) heating. They're also great for zoning — heating/cooling only occupied rooms. Installation costs $3,500-$8,000 depending on number of zones. They're very efficient (20+ SEER) and quiet.

Choose 16 SEER or higher for optimal savings. Minimum standard is 13 SEER, but 16 SEER saves 15-20% on cooling costs. For London's increasingly hot summers (30-35°C heat waves), 16-18 SEER offers the best value. Premium 20+ SEER models save 30-40% but cost significantly more upfront. Most homeowners choose 16 SEER for the sweet spot of value and efficiency. All our ACs are Energy Star certified.

Yes, if both are over 10-12 years old. Replacing together saves on labor (shared work), ensures matching components (optimal efficiency), and often qualifies for better warranties. You'll also get a single project, one warranty, and coordinated scheduling. The combo price ($6,500+) is typically $1,000-$2,000 less than replacing separately. Plus, you'll maximize energy savings from day one.

London homeowners can access: Enbridge rebate up to $650 for high-efficiency furnaces; OHRSP rebate up to $7,500 for heat pumps; Canada Greener Homes Grant up to $5,000 for qualifying energy retrofits; and potential London Hydro incentives for AC upgrades. We handle all rebate paperwork for you — you don't need to figure it out alone. Many homeowners save thousands on new systems.

With annual professional maintenance: furnaces last 15-20 years; air conditioners last 12-15 years; heat pumps last 12-15 years; ductless mini-splits last 15-20 years. Without maintenance, lifespan drops by 30-40%. Regular tune-ups ($149/year) prevent breakdowns, maintain efficiency, and protect warranty coverage. Most homeowners replace their system when it reaches 12-15 years old or when repair costs become excessive.