Family-owned and -operated for over 75 Years

Brennan’s continues the “long-standing tradition of integrity and quality workmanship.”

We take pride in all of our installations - choose Brennan’s as your Team of Choice!

Electrical & HVAC Installations in Orillia, Simcoe, and Muskoka

Dear Valued Customers, 

There’s no question – the declaration of COVID-19 as a worldwide health pandemic is having an impact on our lives, business operations and the way we interact with one another. With this in mind, we continue to monitor and assess the updates provided by the Government of Canada and Public Health. 

This information guides our approach and helps ensure we take the steps that best protect our clients and staff, reduce risk and ensure we continue serving your needs. 

Things are changing rapidly and we’re reaching out with an update about our commitment to safety and well-being. We’ve decided it is in the best interest of our valued clients and staff to limit walk-in service at this time.  There are many convenient ways to safely connect with us during this time.  Please visit our Contact Us Page and reach out should you have any questions.  Contact Us

Our staff are informed and taking precautions to protect themselves and the clients we serve.   We’re confident that by working together and taking temporary extra precautions, we will make a difference in preventing the further spread of this new virus.   We encourage you to stay safe, take care of each other and contact us should you have any questions.

Thank you for your patience and understanding.

Ken Brennan President

HVAC, Furnace, and Electrical Services

Whether it’s during the deep freezes of winter, or humid heat waves of the summer, Brennan’s is available to serve all of your needs. Since 1944, our family-owned and -operated company has served customers all across northern and central Ontario. The secret to our success is our commitment to customer service and satisfaction.

Our experienced, knowledgeable, and fully trained technicians will effectively service or install your furnaces, boilers, air conditioners, as well as take care of your electrical needs. Our highly qualified technicians offer timely, reliable, and efficient service.  

When your HVAC or electrical systems in your home aren’t working correctly, it can cause major problems. From burst pipes to a broken furnace in the winter, these issues can not only cause stress but can also be dangerous and cause extensive damage to your home. So when you need electrical repairs or an HVAC installation in Orillia, turn to Brennan’s Inc. We also offer fireplace installations and have a complete line of residential generators. 

Brennan’s has served Central and Northern Ontario for more than 70 years and can provide sales and service of all brands and manufacturers' models. Whatever the problem may be, our fleet of trucks is available to serve you. Our trucks are fully stocked with the parts, tools, and machines necessary to complete your project or fix your plumbing, electrical, or heating and cooling unit. After-hours service is available. You’re in good hands with Brennan’s courteous professional staff, superior quality, and fully-guaranteed workmanship.

Our Services

We offer installation and repair services for:

  • Heating

  • Electrical

  • Fireplaces

  • Air conditioning

  • Generators

Central and Northern Ontario

For more information, or to schedule a service, please contact us.



We can repair and install energy-efficient heating and cooling systems for your home.



We offer maintenance services for furnaces to help you save on your utility bills.



Our innovative and contemporary fireplaces add beauty to your living rooms.

Air Conditioning

Air Conditioning

Get the perfect cooling for your home with the existing ductwork in your house.


Grills and More

We offer quality grills and grill accessories that can elevate your cooking experience.



Our licenced electricians can help you with renovations, home safety inspections and much more.



Make sure you’re prepared if the power goes out with a residential back-up generator.

How Did We Do?

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Brennan's Inc
5071 Hwy 11 N.
Oro-Medonte, ON

L3V 8H1




Monday – Friday: 8:00 AM – 4:00 PM

Service Area

  • Orillia
  • Simcoe
  • Muskoka


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