Serving Newmarket Since 1981

How S. R. Gillis & Sons Ltd. is protecting you during COVID-19

  • When you call to make a Service or Sales Appointment, we will ask you if you or anyone in your home has travelled outside Ontario in the past 2 weeks, have a fever, been diagnosed with COVID-19 or have been exposed to the virus.
  • Tell you to maintain 6 feet or 2 meters distance from our service technicians or sales representatives at all times.
  • Our service technicians or sales representatives will come prepared with Personal Protection Equipment such as face masks, nitrile gloves (non-latex), booties and will wipe down any surfaces with sanitized wipes touched inside your home.
  • We will not have any work invoices prepared on-site but will mail or email them to you after work has been completed.
  • If you wish to order or pick up filters, please call ahead of time to make sure we have them, pay for them in advance and we can prepare an invoice for you and have the filters ready for curbside pickup. Just call when you arrive at our office.

S. R. Gillis & Sons Ltd. Heating and Air Conditioning

Serving Newmarket and the surrounding areas, S.R. Gillis & Sons Ltd. is a locally owned and operated heating and air conditioning business. From gas and electric furnaces, air conditioners, and heat pumps to ductless splits, gas fireplaces, humidifiers and more, our range of products and quality installation services are unrivalled in the area. We offer after-hour emergency service and NO charge for a quote on new equipment installed!

A Reputation We’re Proud Of

At S.R. Gillis & Sons Ltd. Heating and Air Conditioning, we are proud of the reputation we’ve built in the community. From the office staff to our licensed technicians, we provide excellence in service and installations. If you are looking to replace your existing equipment, need service on any make and model or just want advice, please give us a call or stop by our office; our friendly office staff would gladly answer any of your questions.


Now is a great time to think about replacing your inefficient heating or cooling equipment. Replace your existing equipment with an Energy Star qualified unit and, depending on which unit you choose and its efficiency rating, you can get a number of different rebates.

Call our office today to find out how much of a rebate you can get!

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