HVAC FAQ
Furnace, AC & water heater questions, answered straight
Direct answers from licensed technicians on repairs, installs, pricing, emergency response and maintenance across the Greater Toronto and Hamilton Area. Still stuck? We are one call away.
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General
Who we are, where we work, and the brands we service.
What areas do you serve?
We serve the entire Greater Toronto and Hamilton Area, including Toronto, Mississauga, Brampton, Oakville, Burlington, Hamilton, Vaughan, Richmond Hill, Markham, and surrounding communities. See our full service area list.
Are your technicians licensed?
Absolutely. All of our technicians are fully licensed, insured, and trained to service all major HVAC brands and systems. Learn more about our team.
What brands do you service?
We service and install all major HVAC brands including Lennox, Carrier, Trane, Goodman, Daikin, Rheem, and many more across our residential and commercial HVAC services.
How long has ZK Mechanical been in business?
ZK Mechanical has been serving the Greater Toronto and Hamilton Area for over 15 years, completing thousands of residential and commercial HVAC projects. Read our customer reviews or view our project gallery.
Do you offer warranties on your work?
Yes. All of our installations and repairs come with a workmanship warranty. Equipment warranties vary by manufacturer and are provided with every new installation. Ask about our maintenance plans to extend coverage.
Services
What we install, repair, and maintain across the GTA.
What HVAC services do you offer?
We offer a full range of HVAC services including furnace repair and installation, air conditioner installation and repair, heating and cooling maintenance, water heater repair and replacement, tankless water heater installation, and commercial HVAC solutions.
Do you service both residential and commercial properties?
Yes. We provide residential HVAC services and commercial HVAC services throughout the GTA, including offices, retail spaces, restaurants, and warehouses.
Do you offer ductless mini-split installation?
Yes. Ductless mini-split systems are a great option for homes without existing ductwork or for zone-based cooling. We install and service all major mini-split brands as part of our cooling services.
Pricing
Estimates, financing, and our upfront, no-surprises approach.
Do you provide free estimates?
Yes, we offer free consultations and quotes for new installations and major repairs. Contact us to schedule your free estimate.
How much does a new furnace installation cost?
Furnace installation in the GTA typically ranges from $3,500 to $7,500+ depending on size, efficiency rating, and home requirements. See our furnace installation cost guide for a full breakdown, or request a free quote.
Do you offer financing options?
Yes. We offer flexible financing options for major HVAC installations to help make your investment more manageable. See our financing page for available plans and apply online.
Are there any hidden fees?
Never. We believe in transparent, upfront pricing. You will always know the full cost before work begins, and the price you are quoted is the price you pay. See our current promotions for active discounts.
Emergency
No heat or no AC? Here is how our 24/7 response works.
Do you offer emergency HVAC service?
Yes, we offer 24/7 emergency heating and cooling repair services across the GTA. Call us anytime and our team will respond promptly to get your system back up and running.
How quickly can you respond to an emergency call?
We prioritize emergency calls and aim to have a technician at your location as quickly as possible, often within a few hours depending on your location in the GTA. See our emergency services page for full details.
What should I do if my furnace stops working in winter?
If your furnace stops working, check the thermostat settings and replace the filter. If it still does not start, call us immediately for emergency furnace repair. Avoid using alternative heating sources that could be unsafe.
Is there an extra charge for emergency service?
Emergency service rates may differ from standard rates due to after-hours availability. We will always provide a clear quote before beginning any work. Contact us anytime for transparent emergency pricing.
Maintenance
Filters, tune-ups, and keeping your system running for years.
How often should I change my furnace filter?
We recommend changing your furnace filter every 1 to 3 months, depending on the type of filter, whether you have pets, and your indoor air quality needs. See our furnace filter guide for more detail or learn about indoor air quality options.
How often should I have my HVAC system serviced?
We recommend having your heating system inspected in the fall and your cooling system inspected in the spring. Our maintenance plans cover annual tune-ups, priority scheduling, and repair discounts.
Do you offer maintenance plans?
Yes. Our HVAC maintenance plans include annual inspections, tune-ups, priority scheduling, and discounts on repairs — extending the life of your system and preventing breakdowns.
What are the signs that my HVAC system needs repair?
Common signs include unusual noises, inconsistent temperatures, higher energy bills, frequent cycling, strange odours, and poor airflow. If you notice any of these, contact us for a diagnostic inspection or read when to replace your furnace.
How long does an HVAC system typically last?
A well-maintained furnace typically lasts 15 to 20 years, while air conditioners last 10 to 15 years. Regular maintenance with one of our maintenance plans can help extend the life of your system significantly.
Go Deeper
Want more than a quick answer?
Our Answer Hub covers the big HVAC questions on their own pages — real GTA prices, trade-offs, and step-by-step advice from the people doing the work.
Got a question we did not cover?
Call a licensed GTA technician for a straight answer, or request a fast, no-obligation quote — we are happy to help.
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