Frequently Asked Questions

Got questions about HVAC systems, maintenance, or costs? We've got answers. Browse our most frequently asked questions below, or give us a call at (905) 870-9037 to speak with an expert.

How often should I get my furnace serviced?

We recommend annual furnace maintenance before the heating season starts, typically in early fall. Regular tune-ups catch small issues before they become expensive repairs, improve energy efficiency by up to 15%, and extend your system's lifespan. Our technicians inspect all critical components, clean your system, and ensure it's ready to keep your home warm through Toronto's harsh winters. Book your maintenance appointment between September and October to avoid the rush.

What's the average lifespan of a furnace in the GTA?

A well-maintained furnace typically lasts 15-20 years in our climate, though you may notice declining efficiency after 12-15 years. Factors like usage patterns, maintenance history, and Toronto's temperature extremes affect longevity. If your furnace is over 15 years old and requiring frequent repairs, replacement often makes more financial sense than continued fixes. We can assess your system and provide an honest recommendation based on its condition.

When should I replace my HVAC system instead of repairing it?

A good rule of thumb is the 50% rule: if the repair cost exceeds 50% of a new system's price and your equipment is over 10 years old, replacement usually makes more sense. Also consider replacing if your energy bills are climbing, you're experiencing frequent breakdowns, or major components like the compressor or heat exchanger have failed. We'll always give you honest advice about whether repair or replacement is your best investment.

How do I know what size furnace or AC unit I need for my home?

The right size depends on your home's square footage, insulation quality, window efficiency, ceiling height, and layout—not just a simple calculation. An oversized system cycles on and off too frequently, while an undersized one runs constantly and struggles to maintain comfort. Our technicians perform a detailed heat load calculation following industry standards to ensure your new system is perfectly sized. Proper sizing saves you money on both installation and monthly energy bills.

Do you offer 24/7 emergency HVAC service in Toronto?

Yes, we provide round-the-clock emergency service 365 days a year because we know furnace failures don't wait for business hours. Whether it's a freezing winter night or a sweltering summer weekend, our licensed technicians are ready to respond. Call us at (905) 870-9037 or (647) 607-5763 anytime you need urgent help. We prioritize emergency calls and arrive with fully stocked service vehicles to complete most repairs on the first visit.

How much does a new furnace or AC installation cost?

Installation costs typically range from $3,000 to $8,000 depending on system size, efficiency rating, brand, and installation complexity. Higher-efficiency models cost more upfront but save hundreds annually on energy bills and may qualify for government rebates up to $5,000. We provide detailed, transparent quotes with no hidden fees and explain all your options at different price points. Schedule a free in-home assessment and we'll recommend solutions that fit your budget and comfort needs.

What HVAC brands do you recommend for Toronto homes?

We install premium brands like Lennox, Carrier, and Trane for homeowners seeking top-tier performance and longevity, plus reliable options like Goodman and Keeprite for excellent value. All our recommended brands are built to handle Canadian winters and backed by strong warranties. As factory-certified technicians, we're trained on each brand's specific systems and can service what we install. We'll help you choose the right brand based on your budget, efficiency goals, and home requirements.

Are heat pumps a good option for Toronto winters?

Modern cold-climate heat pumps work efficiently down to -25°C or lower, making them an excellent choice for the GTA. They can heat and cool your home while cutting energy costs by 30-50% compared to traditional systems, and current government rebates can cover up to $5,000 of installation costs. Many homeowners pair heat pumps with their existing furnace as a hybrid system for optimal efficiency and backup heating. We'll assess your home and explain whether a heat pump makes sense for your situation.

How long does HVAC installation take?

Most furnace or AC installations take 6-10 hours and are completed in a single day, while more complex projects like whole-home systems or ductwork modifications may require two days. We'll give you an accurate timeline during your quote and work efficiently to minimize disruption to your household. Our crews arrive on time, protect your home with floor coverings and drop cloths, and thoroughly clean up before we leave. We also test your new system completely and walk you through its operation.

Is GM Comfort licensed and insured?

Yes, we're fully licensed, insured, and TSSA-certified to work on all gas and HVAC systems in Ontario. Our technicians are factory-certified on major brands and receive ongoing training to stay current with the latest technology and safety standards. We've been serving Toronto and the GTA since 2015 with over 1,000 completed projects and 100+ five-star reviews. You can trust that your home and family are in qualified, professional hands.

Why is my AC running but not cooling my house?

Common causes include a dirty air filter restricting airflow, low refrigerant from a leak, a frozen evaporator coil, or a failing compressor. Sometimes it's as simple as a tripped breaker or incorrect thermostat settings. Start by checking your filter and thermostat, but if the problem persists, turn off your system to prevent further damage and call us. Our technicians diagnose AC issues quickly and carry most parts needed for same-day repairs.

What's included in your annual HVAC maintenance service?

Our comprehensive tune-up includes a full system inspection, cleaning of critical components, filter replacement, thermostat calibration, safety control testing, and efficiency measurements. We check for carbon monoxide leaks, inspect heat exchangers and electrical connections, lubricate moving parts, and test your system under operating conditions. You'll receive a detailed report of our findings with photos and recommendations for any concerns. Regular maintenance prevents 85% of system failures and keeps your warranty valid.

Can you help improve my home's indoor air quality?

Absolutely—we install whole-home air purifiers, UV lights, humidifiers, dehumidifiers, and advanced filtration systems that work with your HVAC system. Toronto homes face challenges from winter dryness, seasonal allergies, and tightly sealed construction that traps pollutants indoors. The right air quality solution removes allergens, controls humidity, eliminates odors, and creates a healthier living environment. We'll assess your specific concerns and recommend targeted solutions that integrate seamlessly with your existing system.

What should I do if my furnace stops working in the middle of winter?

First, check your thermostat settings and batteries, ensure your furnace switch is on, and verify your circuit breaker hasn't tripped. If everything looks normal but you still have no heat, call us immediately at (905) 870-9037 or (647) 607-5763—we respond to heating emergencies 24/7. Never attempt to repair gas furnace components yourself, as this poses serious safety risks. Our emergency technicians arrive quickly with fully equipped trucks to restore heat to your home.

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