Commercial HVAC Services in Sarnia & Lambton County
Commercial HVAC Contractor for Sarnia-Lambton
Postma has been a commercial HVAC contractor since 1989, and our commercial division covers Sarnia, Point Edward, Brights Grove, Corunna, Petrolia, Forest, Wyoming, Watford, Brigden and the rest of Lambton County. Highway 40 runs straight from our Chatham-Kent shop through Wallaceburg to Highway 402 in Sarnia, so Lambton County is part of our regular service area, not a one-off trip.
Commercial HVAC in Sarnia: What Your Building Is Up Against
Sarnia sits between Lake Huron and the St. Clair River, and that shapes how commercial equipment works here. Winters bring lake-effect snow squalls, with about 112 cm of snow in an average year, so heating plants and make-up air units run hard from November to March. Summers are humid. Sarnia has more high-humidex days than any Canadian city except Windsor, which means rooftop units spend much of July and August pulling moisture out of the air, not only cooling it.
A lot of Sarnia’s commercial building stock also predates rooftop packaged units. Older offices, schools, churches and plazas still run on boilers, hydronic loops and radiator or fan-coil distribution, and that work makes up a bigger share of our Sarnia calls than it does in Chatham. We service both: the 30-year-old boiler plant and the new high-efficiency rooftop unit on the addition.
Sarnia Saves: Enbridge Incentives for Sarnia Businesses
Enbridge Gas is running a pilot called Sarnia Saves for businesses in Sarnia, Brights Grove and Point Edward. It pays far more than the standard province-wide commercial program, and it’s open until December 31, 2026.
| Stream | What It Pays |
|---|---|
| Prescriptive | Up to 100% of eligible cost, to a maximum of $100,000 per project. Examples include $20,000 per condensing make-up air unit, $10,000 per HRV and $6,000 per demand control ventilation unit. Enbridge says this stream is nearing capacity. |
| Custom | Up to $2.00 per cubic metre of gas saved, capped at $250,000 per project, or $500,000 for institutional, industrial and agricultural buildings. |
The catch is timing. Enbridge has to approve the application before the equipment is bought. If you’re planning a boiler, make-up air or rooftop replacement in Sarnia, call us before you order anything. We’ll quote the job, help you work out which stream fits and give you the equipment details the application needs. Full program terms are on Enbridge’s Sarnia Saves page.
Why Lambton County Businesses Work With Postma
| What You Get | Why It Matters in Sarnia |
|---|---|
| Three trades, one call | HVAC, plumbing and electrical on one invoice. When a no-heat call turns out to be a failed relay or a gas line problem, the same company fixes it, so you aren’t waiting on a second contractor to drive in from somewhere else. |
| A fleet behind the call | 80+ field technicians and 60+ stocked service vehicles. During a cold snap, when every shop in the region is booked, the size of the team decides whether your building gets seen today or next week. |
| Records you can use | Tagged equipment, a written report after every visit and a service history for each unit. That’s what you need for a capital budget, a tender prequalification or an incentive application. |
| Licensed and insured | TSSA-registered contractor with G1 and G2 gas technicians, ECRA/ESA licensed electrical contractor (Licence #7015639), WSIB in good standing and full liability coverage. Certificates are ready for Lambton County tenders. |
Commercial HVAC Services Available in Sarnia
New ConstructionDesign-build and tendered mechanical packages for new Lambton County builds and fit-outs. |
Preventative MaintenanceScheduled service, written condition reports and replacement forecasting for boilers and rooftop units. |
Repair & Emergency24/7 diagnosis and repair on rooftop units, boilers, make-up air, refrigeration and controls. |
ReplacementBoiler and rooftop changeouts, crane lifts and upgrades scheduled around your hours. |
Permits for Commercial HVAC Work in Sarnia
Inside the City of Sarnia, new or altered heating and air conditioning systems need a permit from the city’s Building Department. Plumbing permits work differently here: they’re issued by the County of Lambton’s Building Services, not the city. Outside Sarnia, each Lambton municipality handles its own. We tell you at the quote whether your job needs a permit and pull it for you.
Sarnia Commercial HVAC FAQ
Do you work on older boiler and hydronic systems?
Yes, and it’s a bigger part of our Sarnia work than our Chatham work. We service condensing and atmospheric boilers, circulating pumps, glycol loops, expansion tanks and radiator or fan-coil distribution, and we do combustion analysis on every boiler we maintain.
Does my building qualify for Sarnia Saves?
It’s for Enbridge business customers in Sarnia, Brights Grove and Point Edward, roughly north of Highway 25 and west of Highway 26. Enbridge confirms eligibility on the application. Remember that approval has to come before you buy equipment, so talk to us before you sign off on a replacement.
Can you bid tendered municipal or institutional work in Lambton County?
Yes. We take plan-and-spec tenders as well as design-build, and we can supply our TSSA and ECRA/ESA registrations, WSIB clearance and insurance certificates for prequalification.
Will you service equipment another contractor installed?
Yes. Brand and installer don’t matter. On the first visit we tag each unit and write up its condition, so you know where everything stands.
How do maintenance customers get priority in Sarnia?
Buildings on a preventative maintenance agreement go to the front of the line for emergency calls. Because we already know the equipment, the technician usually arrives with the right parts on the first trip.
Which Lambton County communities do you cover?
Sarnia, Point Edward, Brights Grove, Corunna, Courtright, Petrolia, Oil Springs, Wyoming, Watford, Forest, Brigden, Grand Bend, Walpole Island and the rural areas in between.
Planning HVAC work in Sarnia? Call 519-354-9491 or request a commercial assessment. See all commercial HVAC services, our Windsor-Essex commercial HVAC page, or our full range of commercial services.
Need commercial HVAC service in Sarnia or Lambton County? Call 519-354-9491 or send us an equipment list and we'll scope it. Postma covers Sarnia, Point Edward, Corunna, Petrolia, Forest, Watford and all of Lambton County, with 80+ field technicians and 60+ stocked service vehicles behind every call.