Niagara's Fastest Customer Response Time

At MARZ your heating, AC systems and comfort are our #1 priority.

We respond fast because you're our neighbours and we have your back.

Book a service
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5 Star rating from 90+ reviews
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Call or Text us for emergency service

Available 24/7 for urgent AC repairs.
Don’t wait, call or text us at +1 (437) 238-6556

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Schedule your service

Routine maintenance at a time that suits your service. Book a consultation.

We’re the experts you trust every time

We’re a family-owned business serving Niagara families with reliable HVAC and heat pump solutions built for Ontario's summers and winters.

We treat your home like our own, and we always take our shoes off! 

More about us

15+

Years Serving Niagara Families

98%

Customer Satisfaction Rate
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HiraiWSIB CSPAATSkilled Trades OntarioTSSA - Technical Standards & Safety Authority

We're Your Neighbours

Our commitment to quality of services and customer satisfaction is why Niagara, St. Catharines, Welland and surrounding area homeowners trust us with their heating & cooling.

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Family-Owned & Local
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Certified Experts
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Quick Responses (text us!)
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Personal Service
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Transparent Pricing
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We always take our shoes off
About MARZ

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Book your appointment

Call, text, or message us on WhatsApp.
We make it easy to get in touch with us.

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Inspection & service

Our certified technicians will arrive on time to inspect your system.

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Follow-up & support

Stay comfortable year-round with proactive care and same-day support when you need it

We're Transparent About Pricing

Basic repair

$120

Perfect for smaller repairs and regular maintenance of your AC.

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Quick response time
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Filter replacement
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Full system diagnostic
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Available 24/7
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30 days warranty
Book now

Diagnostics

$110

We'll come and diagnose your issue and waive our diagnostic fee if we fix it

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Full AC/Furnace Diagnostics
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Mechanical parts check
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Details visual inspection
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Function testing
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6 months warranty
Schedule installation

Preventative Maintenance Plans

$34.99

Ensure your heating & cooling systems run smoothly with plans starting at:

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Full system diagnostic
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Thermostat function check
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Inspect all mechanical parts
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Replace filters
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Test for carbon monoxide
Get a free quote

Niagara Families Love Us ❤️

4.9/5 ratings from 150+ customer reviews.

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Marlon and his crew replaced our furnace, installed a tankless hot water heater, a heat pump, an HRV system, an electrostatic air purifier, and a UV lamp—all in one go.

We couldn’t be happier!

Eric F.

Niagara, ON
Star

They actually understand your need as home owners and guide you through the entire process. That means nothing is hidden and where there is transparency and trust, there is excellence.

Eva B.

Niagara, ON
Star

My furnace fan broke and David and Marlon came to do the repair. The 2 of them were absolutely wonderful very knowledgeable. Also me, being afraid of getting misled they put my worries to rest and no extra hidden costs or things I didn’t need. I would definitely recommend them and use this company.

Carla B.

Niagara, ON
Star

MarZ was excellent in every way. They arrived punctually and were polite, professional and friendly throughout the process. When a vacuum reading was not quite right Marlon and his assistance stayed until it was perfect. Pricing was competitive too.

I highly recommend MarZ.

Terry M.

Niagara, ON
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Frequently asked questions

How quickly can you repair my AC?

We aim to provide same-day service for most repairs, depending on availability and the complexity of the issue.

Do you offer emergency AC services?

Yes, we offer 24/7 emergency repair services to ensure your AC is fixed when you need it most.

What’s included in your maintenance plan?

Our maintenance plan includes annual inspections, cleaning, tune-ups, and priority scheduling for repairs.

How much does AC installation cost?

The cost varies depending on the type and size of the unit. Contact us for a free, personalized quote based on your home’s needs.