TSSA-Registered · Licensed Gas & AC Technicians
Comfort you can count on, every season.
Furnaces, air conditioners, heat pumps and water heaters — installed and repaired by licensed technicians who show up on time, explain your options clearly and stand behind the work.
- TSSA-registered contractor
- G2 Gas Technician & 313D AC Mechanic
- Free in-home assessment & written quote
- Service in English and Mandarin
Book a free in-home assessment
Services
Installation, repair and maintenance for every part of your home’s comfort system — done by licensed technicians.
Furnace Installation & Repair
High-efficiency gas furnace installation, replacement, repair and annual maintenance by licensed gas technicians.
Learn moreAir Conditioner Installation & Repair
Central air conditioner and ductless mini-split installation, repair, refrigerant service and seasonal tune-ups.
Learn moreHeat Pump Installation
Cold-climate ducted and ductless heat pumps, including hybrid systems paired with your gas furnace. Rebate help included.
Learn moreWater Heaters, Tankless & Boilers
Tank and tankless water heaters, combi boilers and hydronic boilers — installation, replacement and repair. Rental buy-out help.
Learn moreDuctwork, Thermostats & Indoor Air Quality
Ductwork design and modification, humidifiers, HRV/ERV ventilation, air filtration and smart thermostats.
Learn moreWater Softeners & Water Filtration
Water softeners, whole-home filtration, reverse osmosis drinking water systems and UV purification.
Learn moreSpray Foam & Attic Insulation
Closed- and open-cell spray foam for basements, rim joists, garages and walls, plus attic insulation upgrades.
Learn moreGovernment Rebate Application Help
We identify the rebates your upgrade qualifies for, choose eligible equipment and help you prepare the application.
Learn moreWhy homeowners choose Allseason HVAC
Licensed, not just experienced
Every gas and refrigeration job is done by a certified G2 gas technician or 313D residential air conditioning mechanic, under a TSSA-registered company.
Right-sized equipment
We measure your home before recommending a system. An oversized or undersized unit costs more to run and wears out sooner.
Clear written quotes
You get the model numbers, scope of work and warranty terms in writing before any work begins. No pressure, no surprise add-ons.
Rebate help included
We check which Ontario rebates your upgrade qualifies for and help you prepare the paperwork so money isn't left on the table.
How it works
- 1
Request an assessment
Fill out the form or call us. We reply the same business day.
- 2
We visit your home
A licensed technician inspects your current system, measures and discusses your goals — free of charge.
- 3
Get a written quote
Clear options with equipment, scope, timeline, warranty and eligible rebates.
- 4
Clean, code-compliant install
Permits where required, careful workmanship, full clean-up and a walkthrough of your new system.
Service Areas
We are based in Richmond Hill and serve homeowners across York Region and the Greater Toronto Area.
Common questions
Is the in-home assessment really free?
Yes. Assessments for new installations and replacements are free and come with a written quote. There is no obligation to proceed.
Which areas do you serve?
We are based in Richmond Hill and serve the Greater Toronto Area, including Markham, Vaughan, Thornhill, Toronto (North York and Scarborough), Aurora, Newmarket, Stouffville and King City.
Are you licensed and registered with TSSA?
Yes. Allseason HVAC Inc. is a TSSA-registered contractor. Gas work is completed by a certified G2 gas technician and air conditioning work by a certified 313D residential air conditioning mechanic.
Do you speak Chinese?
Yes. We provide service in both English and Mandarin.
Why don't you list prices on the website?
Every home is different. Equipment size, venting, ductwork, electrical capacity and access all affect the cost. A free assessment lets us give you an accurate written quote instead of a guess.
Not sure what your home needs?
Book a free, no-obligation in-home assessment. We'll tell you honestly whether to repair or replace.