Trusted Heating & Cooling Experts in Cobourg, Port Hope & Northumberland
Stay comfortable all year
Comfort Zone Heating & Air Conditioning installs, repairs and maintains furnaces, air conditioners, heat pumps and water heaters for homes across Northumberland County, with licensed technicians and honest advice.
Our Services
Complete Home Comfort for Cobourg and Northumberland Homes
From a furnace tune-up to a full system replacement, our licensed technicians handle every step in-house with Lennox equipment and honest advice.
Heating
Lennox furnace installs, repairs and tune-ups that keep you warm through any cold snap.
Cooling
Air conditioner and ductless installs, repairs and maintenance from Lennox-trained pros.
Water Heaters
Navien tankless, tank water heaters and boilers for endless hot water and lower bills.
Indoor Air Quality
Cleaner, healthier air with purification, humidity control and duct cleaning.
Limited Time
Heating Season Offers for Northumberland Homeowners
Save on a new high-efficiency system this fall, or earn cash by sending a neighbour our way. Offers end December 1, 2026.
Upgrade to a High-Efficiency Lennox Furnace
Replace an old, noisy or costly furnace with a Lennox before winter sets in. Free in-home estimate, professional installation and pay monthly using NGL.
On qualifying installs until December 1, 2026.
Claim This Offer →
Endless Hot Water, Lower Energy Use
Switch to a Navien tankless water heater and stop running out of hot water. Compact, efficient and installed by our licensed team.
On qualifying installs until December 1, 2026.
Claim This Offer →Refer a Friend, Earn Cash
Send friends, family or neighbours to Comfort Zone. When they install a new system, you earn $100 for every qualifying component.
Refer a Friend →
Whatever Your Comfort Needs, Our Local Team Is Here to Help
Since 2005, Comfort Zone Heating & Air Conditioning has kept homes across Cobourg, Port Hope and Northumberland County warm in winter and cool in summer. We started on heating, cooling and duct cleaning, and today our licensed technicians install and service furnaces, air conditioners, heat pumps, water heaters, boilers and fireplaces.
What has not changed is how we work. We answer the phone, we show up when we say we will, and we stand behind every job.
- Licensed, insured and Lennox-trained technicians
- Rated 4.9 stars from 895 Google reviews
- True 24/7 emergency service, every day of the year
- Six written guarantees on our work
Don’t Wait
Ignoring Furnace Problems Can Cost You This Winter
Small heating problems turn into big bills fast. Catching them early is the cheapest fix there is, and a tune-up or repair visit from our team makes it easy.
Book a Furnace Check →Higher Heating Bills
A dirty or worn furnace works harder and longer to heat your home, and you pay for it every month.
Cold Rooms and Dry Air
Uneven heat, weak airflow and dry winter air make your home uncomfortable when you need it most.
Breakdowns on the Coldest Night
Minor issues often turn into failed parts or a full replacement, usually at the worst possible time.
Safety Risks
A cracked heat exchanger or blocked vent can leak carbon monoxide. Annual maintenance catches it early.
Why Comfort Zone
What Sets Comfort Zone Apart
Here is what you get with our team, and what to ask any contractor before you sign.
| What You Get | Comfort Zone | Ask Others |
|---|---|---|
| 24/7 emergency service with a local team | ✓ | Not always |
| Serving Northumberland since 2005 | ✓ | Varies |
| Lennox award-winning installs | ✓ | Varies |
| Pay monthly using NGL | ✓ | Not always |
| Licensed and insured technicians | ✓ | Ask for proof |
| Six written guarantees | ✓ | Rarely in writing |
Awards, Reviews and Guarantees
Every Comfort Zone technician is licensed and insured, and every install is backed by our written guarantees.
Lennox Award WinnerOur Service Area Across Northumberland County and Beyond
From our Cobourg showroom at 701 Brook Rd N, our trucks cover Port Hope, Brighton, Quinte West and the towns in between, with same-day service when you need it.
Towns we serve
- 24/7 emergency service across the region
- Free in-home estimates on new equipment
- Local technicians who know older Ontario homes
Meet the Comfort Zone Team
Licensed technicians, comfort specialists and office staff based right here in Cobourg. The same people who answer your call are the ones who show up at your door.
Meet Our Team →3 Simple Steps to a Comfortable Home
No pressure, no surprises. Here is how working with Comfort Zone goes.
Free Estimate
A comfort specialist visits, looks at your home and walks you through the right options for your needs and budget.
Installation
Our licensed technicians install your new system cleanly and safely, then show you how everything works.
Ongoing Care
We follow up, register your warranty and keep your system running with maintenance and our service plans.
Join Thousands of Happy Northumberland Homeowners
Rated 4.9 stars from 895 Google reviews.
Just recently contacted them for a service call and they responded quickly. Awesome all around experience. Highly recommend!
I called in the mid morning for a propane furnace issue and was fixed and running by 130 in the afternoon.
AJ the service tech was very friendly, knowledgeable and explained exactly what was causing the issue and remedied it accordingly.
Five stars all the way around.
Common Questions About Our HVAC Services
Straight answers about service areas, offers, response times and what to expect from Comfort Zone.
What areas does Comfort Zone serve?
Do you offer 24/7 emergency service?
Do you charge for estimates?
What brands do you install?
Can I pay monthly?
What rebates are available right now?
How does the referral program work?
What guarantees do you offer?
Home Comfort Tips and Guides
Practical advice for Northumberland homeowners from our technicians.
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Call Us
289-205-3815Hours
Office 9 am to 5 pm, 7 daysEmergency service 24/7
Free Quote
Get Your Free Quote Today
Tell us what you need and a Comfort Zone specialist will call you to book your free in-home assessment.
- $1,000 off Lennox furnaces until December 1
- $400 off Navien tankless until December 1
- Pay monthly using NGL