2
Ontario offices
Featured Lennox
Units we’re promoting right now
Serving Simcoe Region, York Region, and the GTA north — Keswick, Georgina, Sutton, Newmarket, Bradford, East & West Gwillimbury, Holland Landing, Innisfil, Richmond Hill, Stouffville, Markham, and more from our Keswick and Markham offices. Ask about local promotions when you call.
We don’t sell equipment through this site — we size, install, and warranty it in the field. Ask what we’re recommending for your home.
- SL28XCV — Variable-capacity AC
- XC21 — High-efficiency central air
- SLP99V — Modulating gas furnace
- EL296V — Two-stage furnace
- Cold-climate heat pump — Electric heat + cooling
- PureAir S — Whole-home air quality
Cooling
Reliable central air, high-efficiency AC upgrades, and ductless mini-splits for homes that need zoned comfort. We handle precision installs and retrofits: evacuation depth, manufacturer charging targets, condensate traps and overflow paths, and commissioning that checks coil delta-T against humidity — not just a cold line set for a photo. Proactive maintenance covers coils, drains, capacitors, contactors, and blower cleanliness; repairs start with electrical and refrigerant diagnosis. Emergency service when the heat will not let up. Our licensed team stays current on smart thermostats, zoning, and high-SEER equipment so you get honest recommendations, not a one-size brochure package.
Explore coolingHeating
Furnace installation and replacement, boiler work, and cold-weather troubleshooting from a family-run crew with decades in the trade. We size for real duct static and insulation, stage controls to match how you live, and follow a careful install process: vent slope and termination, gas and electrical code checks, condensate management, and documented temperature rise and safety tests before we leave. Maintenance catches weak ignitors, inducer wear, and heat exchanger red flags before February surprises. Same transparent pricing mindset as the rest of the site — built for Keswick, York Region, and Markham.
Explore heating24/7
Emergency line
5.0
Google rating
Why homeowners call us
Straight answers, tidy work, and pricing you can understand.
Clear, upfront pricing
Written quotes before major work, with room to ask questions before anything gets ordered.
Licensed, careful installs
Neat mechanical rooms, proper venting, and commissioning that matches the manufacturer spec.
Efficient equipment choices
We match systems to your home and budget instead of pushing the biggest box on the truck.
Free estimates
Replacement and upgrade visits include a straight scope and price range you can compare.
Warranty support
Parts and labour coverage is explained in plain language before you sign off on the job.
Two-office coverage
Keswick and Markham locations with the same standards — built on repeat customers across York Region.
Google reviews
What neighbours are saying
Real feedback from homeowners across York Region and Markham.
Products & services
Trusted HVAC solutions for homes.
Same-day and scheduled appointments across York Region and Markham. Call +1 (437) 288-8593.
Two offices. Same crew standards.
HVAC that sounds like your neighbour recommended it — not a call centre script.
We’re a local crew that treats your mechanical room like it matters — because it does. We’ve seen which “cheap fixes” turn into February emergencies, and we’d rather tell you the truth on Tuesday than sell you panic on Saturday night.
You’ll get a real walkthrough of what we found, what has to happen now, and what can wait. If a repair isn’t worth it on a rusted heat exchanger or a dying compressor, we’ll say so plainly and price the replacement without games.
From Keswick, Sutton, and Georgina across York Region — Newmarket, Bradford, East Gwillimbury, and beyond — to our Markham branch, we’re built for cold snaps, humid Julys, and the rebate paperwork nobody wants to read.
Questions homeowners actually ask
HVAC in York Region & Markham — straight answers (and what we avoid)
Straight answers on emergencies, red flags, quotes, and heat pumps — the same language we use on service calls, written for homeowners comparing options.
What should I look for in a York Region HVAC company—and what are red flags?
Look for clear written quotes before major work, visible licensing, combustion or refrigeration diagnostics when they matter, and technicians who explain options without pressure. Red flags include vague flat rates with no scope, refrigerant “top-ups” without leak searches, upselling replacement on every service call, or crews who won’t show photos of failed parts or unsafe conditions.
My furnace is running but the house is cold. When is it an emergency?
If you smell gas, your CO alarm is sounding, or you see soot or scorch marks, get everyone outside and call your utility emergency line first—then a licensed tech. If it’s simply uneven heat or short cycling, it’s usually not life-threatening, but don’t ignore repeated lockouts, loud rumbling, or a burning smell; those need prompt professional diagnosis.
How do I know if my air conditioner needs repair versus replacement?
Age, refrigerant type, coil condition, and repair cost relative to value all matter. We hunt root causes—weak capacitors, airflow restrictions, leaks—before quoting equipment. If the coil is badly corroded, you’re on legacy R-22, or the compressor is failing after multiple band-aid fixes, an honest replacement map usually saves money and August sleep.
Do you really have two offices, and does that help response times?
Yes—Keswick and Markham. It shortens drive time for many York Region and Markham neighbourhoods while keeping the same install and documentation standards. Same phone line, same booking flow, same warranty support.
Are free estimates actually free if you might recommend a new system?
Replacement and upgrade visits include a clear scope and price range you can compare—no bait-and-switch “trip fee” games on quoted work. If we recommend new equipment, you’ll see why in plain language—safety, reliability, efficiency, or total cost of repeat repairs—not a scripted scare tactic.
Why do heat pump quotes vary so much between contractors?
Cold-climate performance depends on sizing, line sets, defrost and auxiliary heat strategy, commissioning, and rebate paperwork—not just outdoor unit sticker price. A low quote that skips load planning, vacuum and charge verification, or electrical upgrades often costs more in comfort and callbacks. We price the job as a system, not a box drop.
Which towns do you serve for HVAC installs and repairs besides Keswick and Markham?
We work across Simcoe Region and York Region — including Keswick, Georgina, Sutton, Pefferlaw, Innisfil, Newmarket, Aurora, Holland Landing, East & West Gwillimbury, King, Bradford, Richmond Hill, Stouffville, and Markham from our Keswick and Markham offices. If you’re on the edge of normal coverage, we’ll be upfront about drive time, capacity, and what we can commit to before we book.
What brands do you install and stand behind?
We’re a Lennox dealer and focus on equipment we can warranty, commission, and support properly. Ask what we’re promoting for your home—we size for real ducts and insulation, not catalogue hype.
Locations
Visit either office
Keswick and Markham locations for installs, service, and pickup questions.
Heat and Cool Brothers
Keswick office
430 The Queensway S, Unit 27, Keswick, ON L4P 2E1
Get in touch
Book online or call for service.
Emergency or planned work. We answer the phone and arrive prepared.