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HVAC Contractor in Ajax

From Pickering Village to the waterfront, we install furnaces, tank and tankless water heaters, water treatment and air quality systems in Ajax homes. Upfront installed prices and no rental contracts.

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  • 5.0★ from 55 Google reviews
  • Same-day installs often available
  • 10-day money-back guarantee
Neon AJAX sign at Pat Bayly Square in Ajax, Ontario
Photo: FaysaLBinDaruL, CC BY 4.0

Brands We Install

Ajax's Trusted HVAC Experts

A lot of Ajax homes were built in the 1990s and 2000s, and their original furnaces and water heaters are now due. We help you replace them on your schedule, with clear pricing and a clean, professional install.

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Explore Our Product Categories

Discover the systems we install every week. Every price includes standard installation, so you can compare options that fit your home and budget.

Tank Water Heater Tankless Furnace Power Vent Two-Stage Furnace Water Softener Reverse Osmosis UV Water Sterilizer HEPA Air Filtration UV Air Purifier HRV Ventilator

Home Comfort Services in Ajax

Water Heaters Ajax

Water Heater Installation in Ajax

Tired of a rental charge on your bill? Own your next water heater instead. We install gas tanks in Ajax from $2,195, remove the old tank and register the warranty for you.

Installed from $2,195
Explore Water Heater Installation
Ajax Tankless Water Heaters

Endless Hot Water on Demand in Ajax

A Rinnai condensing tankless heater hangs on the wall, frees up floor space and heats water only when you need it. We size it to your fixtures so showers never run cold.

Installed from $5,495
Explore Tankless Installation
Furnace Services Ajax

Furnace Installation in Ajax

If your Ajax home still has its original furnace, it may be 20 years old or more. A Lennox high-efficiency replacement is installed from $4,945, sized to your home before install day.

Installed from $4,945
Buy a Furnace
Water Treatment Ajax

Water Softeners & Filtration in Ajax

Softeners, reverse osmosis drinking water and whole-home UV sterilizers, installed and set up for your water. Protect your new water heater and taste the difference.

Installed from $1,345
Explore Water Treatment
Indoor Air Quality Ajax

HRVs & Air Purification in Ajax

Fresh, filtered air all year. Lifebreath HRVs, Lennox HEPA filtration and UV lights connect to your furnace ductwork and quietly clean the air in every room.

Installed from $795
Explore Indoor Air Quality
Aerial view of homes across Ajax, Ontario
Photo: The Town of Ajax, CC BY 3.0
10 yearsinstalling across Southern Ontario
Local know-how

Ajax homes built in the '90s and 2000s are due

Much of Ajax grew quickly through the 1990s and 2000s. That means many homes in Northwest and Central Ajax still have their original furnace, and many have already replaced the water heater once. If your equipment is 15 years old or more, it is worth planning ahead rather than waiting for a no-heat call in January.

Many Ajax families use a replacement as the moment to stop renting. Buying outright means no monthly rental charge on your utility bill, and you keep the full manufacturer's warranty. If you would rather spread the cost, choose humm at checkout to pay monthly.

  • Planned furnace replacements before winter
  • Rental-to-owned water heater swaps
  • Water softeners and reverse osmosis for the kitchen
Get a free quote Call 905-418-2629
10-Day Money-Back Guarantee Not happy with your new equipment within 10 days of installation? Tell us and we'll make it right. See the guarantee Need More Flexibility? Replace a failed furnace or water heater now and spread the cost. Choose humm at checkout to pay monthly, subject to approval. Learn more
Same-Day Installs in Ajax Book early and we can often install the same day. Our technicians remove your old unit and register your manufacturer's warranty for you. Check today's availability
Technician installing a new water heater

Our Go-To Guide for Home Comfort

View all guides
Water HeatersBuy vs Rent a Water Heater in Ontario: 15-Year Cost Comparison Renting a power vent water heater in Ontario costs more than $6,800 over 15 years at typical rates. Buying ... Read more Water HeatersWater Heater Replacement Cost in the GTA & Ontario (2026) Replacing a 40 to 60 gallon gas water heater costs $2,195 to $3,295 installed across the GTA and Southern O... Read more FurnacesLennox ML196 vs ML296: Single-Stage or Two-Stage Furnace? Both Lennox Merit furnaces are 96% AFUE. The ML296 adds two-stage heat and a variable-speed blower for $550... Read more Water HeatersPower Vent vs Chimney Vent: Which Water Heater Does Your Home Need? A chimney vent tank is the simplest swap if your chimney still works well. After a furnace upgrade, a power... Read more Water TreatmentSigns You Need a Water Softener Scale on fixtures, spotty dishes and stiff laundry are classic signs of hard water. Learn how to test your ... Read more FurnacesHow to Check Your HVAC Contractor Is TSSA-Registered in Ontario Before anyone works on your gas furnace or water heater, check the company on TSSA's public registry and as... Read more

Serving Homes Across Ajax & Nearby Areas

From older bungalows to brand-new builds, we install furnaces, water heaters, water treatment and air quality systems in every part of Ajax and across Durham Region. We also serve nearby Pickering, Whitby and Scarborough.

Neighbourhoods we serve in Ajax

  • Pickering Village
  • South Ajax
  • Central Ajax
  • Northwest Ajax
  • Northeast Ajax
  • Southwest Ajax
  • Carruthers Creek
  • Duffins Bay
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Real Homeowners. Real Reviews.

Join 300+ happy homeowners across the GTA and Southern Ontario

5.0 out of 5 based on 55 Google reviews
S
Saad R.Google review
★★★★★

Great experience with Mr. Heating and Home. Clear and helpful communication throughout, talked me through options, cost/benefit and answered every question. Installation was on-time, clean and with licensed professionals. And the best part, beat Costco pricing and let me pay by Amex!

M
Marion H.Google review
★★★★★

We had pleasant experience with Mr. Heating and Home. They installed a heat pump, electrical furnace, thermostat and a new electrical panel. Everything went smooth. No complaints. They laid down a red carpet and were respectful, professional.

G
Garry T.Google review
★★★★★

I had an old air system taken out and a new heat pump put in. These guys did a great job and were quick installing the new heat pump. When they left everything was clean and tidy. I would recommend Mr.Heating and Home team to anyone looking to upgrade! Great team!

T
Tamkin N.Google review
★★★★★

Uthman was amazing! The process was so smooth and the installers were helpful and polite. They put down a carpet to make sure nothing was damaged and were very professional. I highly recommend them.

N
Nancy D.Google review
★★★★★

Installed a water heater and water softener. There was issue during installation with a blocked pipe from my old water heater. I initially was upset but they resolved everything and made sure I was happy in the end.

D
Debbie D.Google review
★★★★★

Awesome man helped me so much thankyou Mohammed. I got the whole house UV purification system, and a reverse osmosis system, so excited to not use plastic bottles anymore.

Ajax Furnace & Water Heater FAQs

Is it cheaper to buy or rent a water heater in Ajax?
Over the life of a heater, buying is usually cheaper than renting because rental charges continue every month. Our tank water heaters are installed from $2,195, and you own it outright.
How long does a furnace installation take?
Most furnace replacements are completed in one day. We'll confirm timing when we book.
Do you install same day in Ajax?
Often, yes. Call 905-418-2629 early in the day and we'll check what's possible for your address.
Can I pay monthly?
Yes. Choose humm as your payment method at checkout, subject to approval.

Ready for a quote in Ajax?

Tell us what you need and we'll follow up the same day. No pressure, no surprise fees.

  • Upfront installed pricing
  • Licensed, insured technicians
  • Same-day installs often available

By submitting this form, you agree to receive communications from us about your inquiry.

Need Quick Answers?

Call us at 905-418-2629 and a real person will help you choose the right system.

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