HVAC Contractor in Whitby ON

Lazzaro Gas is a reputable and dedicated local HVAC contractor based in Whitby, specializing in providing top-quality heating, ventilation, and air conditioning services to both residential and commercial clients. With years of experience and a team of skilled professionals, we pride ourselves on delivering exceptional customer satisfaction and ensuring the comfort and performance of your HVAC systems.

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24/7 Emergency Support Available

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Estimates Within 24 Hours

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Gas Tech 1 Licensed & TSSA Registered

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Serving Whitby, Oshawa, Ajax, Pickering, Brooklin & Surrounding Areas

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Whitby's Trusted HVAC & Gas Specialists

Reliable HVAC Solutions Done Right the First Time

With over 12 years of hands-on experience across residential, commercial, and industrial systems throughout Durham Region, the Lazzaro Gas & HVAC team brings deep technical expertise to every job.


We work within your budget, educate you on your options, and never cut corners. Our goal is to get the job done right the first time, because quality equipment and professional workmanship are what protect your home long-term.

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Our Services

From heating and cooling to gas appliances and commercial HVAC, we deliver reliable installation, repair, maintenance, and retrofit solutions with quality workmanship, honest service, and dependable results for every property.

Our Work Is Backed: Parts, Labor, and Peace of Mind

Every installation we complete is backed by manufacturer parts warranties and our own labor guarantee. We also register all equipment on your behalf, so your warranty is secured from day one.

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Labor Warranty on Keeprite & Navian Equipment

We stand behind our installations with a 2-year labor warranty on all Keeprite and Navian equipment. If anything fails due to our workmanship within that period, we make it right at no cost to you.

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1-Year Labor Warranty on Other Equipment

For all other brand installations, we provide a 1-year labor warranty. Quality work is quality work regardless of brand. We hold ourselves to the same standard on every job.

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We Register Your Equipment For You

Most homeowners forget to register their new equipment, which voids the manufacturer's 10-year parts warranty. At Lazzaro Gas & HVAC, we register every installation through our licensed contractor account, so your full warranty is secured automatically.

Why Durham Region Homeowners Choose Lazzaro Gas & HVAC

Local Expertise. Honest Service. Reliable Results.

We're not a call center, a rental company, or a fleet of strangers. We're a local, owner-operated business and that makes every job personal.

  • Owner on Every Job: When you call Lazzaro, you speak directly with Gabe. No middlemen, no commission-hungry sales reps. Just honest advice from the person doing the work.
  • Gas Tech 1 Licensed & TSSA Registered: We hold a commercial Gas Tech 1 license and are registered with the TSSA. Our work is completed to code, every time, and we pass our audits.
  • Quotes Within 24 Hours: Residential quotes are honored for 30 days. Commercial quotes are valid for 7 days. You'll always know exactly what to expect before we start.
  • Same-Day Parts Availability: As a Keeprite dealer, we have same-day access to the most common parts. You won't wait days for heat in January because we couldn't source a component.
  • We Register Your Equipment: Every installation is registered through our licensed contractor account so your manufacturer's 10-year parts warranty is fully secured.
  • 24/7 Emergency Support: Emergencies don't follow business hours. We offer 24/7 emergency support upon request so you're never left without heat or hot water when it matters most.


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Credentials You Can Trust

Certified expertise, trusted partnerships, and reliable HVAC service you can count on

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Google Reviews

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Keeprite Authorized Dealer

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Technical Standards & Safety Authority

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Navian Trained Installer

No Heat? No Hot Water? We're On It.

Lazzaro Gas & HVAC provides fast, professional furnace, AC, water heater, and gas line service across Durham Region. Licensed, registered, and ready to respond.

Rooted in Durham Region

Lazzaro Gas & HVAC isn't just a business in this community. We're part of it. We make monthly donations to SickKids Hospital, participate in the Durham Police Teddy Bear Drive every year, and support local initiatives like Feed the Needy Durham. We're proud to give back to the region that trusts us with their homes.


Discounts for Local Sports Families
As a sponsor of local hockey in Oshawa and a supporter of Whitby youth sports, we offer special discounts for families registered with Whitby Lacrosse and Whitby Hockey. Ask us about current offers when you call.

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Other HVAC Contractors 

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Who answers the phone: A call center or dispatch service.

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Licensing: May not hold a Gas Tech 1 or TSSA registration.

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Equipment Registration: Rarely handled for the homeowner.

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Quotes: May take days or require an on-site visit before any pricing.

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Parts Availability: May need to order parts, leaving you without heat for days.

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Price: May be cheaper, but corners are being cut .

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Lazzaro Gas & HVAC

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Who answers the phone: Gabe, the owner, answers directly.

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Licensing: Gas Tech 1 licensed, TSSA registered contractor.

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Equipment Registration: We register all equipment to secure your 10-year parts warranty.

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Quotes: Ballpark over the phone or video; full quote within 24 hours.

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Parts Availability: Same-day Keeprite parts access through our dealer account.

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Price: Fair, transparent pricing. You know exactly what you're paying and why.

SERVICE AREAS

Serving Whitby, ON & Surrounding Areas

Professional HVAC installation, repair, and maintenance services across Whitby and nearby areas, delivering reliable comfort, energy efficiency, and lasting performance.

Brooklin
Pringle Creek
Williamsburg
Downtown Whitby
South Ajax
Pickering Village Area
Clarington Communities
North Oshawa
Downtown Oshawa
Kedron
Rosebank
Liverpool
Dunbarton
Eastern Scarborough Service Area
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Frequently Asked Questions

Client Reviews

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Contact Our Team

Contact Info

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Service Area

Whitby, Brooklin, Oshawa, Bowmanville, Ajax, Pickering, and Scarborough.

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Business Hours

Mon - Tue
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Wednesday
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Thursday
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Friday
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Saturday
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Sunday
Closed
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