Furnace Buying Tips

Buying or replacing your furnace with a new natural gas model is an investment, but you'll see big savings on your energy bill year after year.

Union Gas delivers gas to you but we do not sell, rent, or service gas appliances.

Select a contractor

In Ontario, qualified Heating, Ventilating, and Air Conditioning (HVAC) contractors must be licensed and registered with the Technical Standards and Safety Authority (TSSA). Find a contractor in your area on the TSSA website.

A couple calculating how to save money on their bill

Get three estimates

  • Each contractor should review your home size and construction and offer a variety of models in different price and efficiency ranges that meet your needs.
  • The written estimate should include details on equipment, efficiency, and warranty as well as removal of the old equipment. The contractor should also inform you of any incentives available.
  • Ask the contractor for references, maintenance, and emergency coverage.

Select a heating system

  • When selecting your heating system, always consider the most efficient unit available. Although energy-efficient furnaces may have a higher initial cost, you will realize energy cost-savings with the long-term benefit of lower operating costs.
  • High-efficiency furnaces vent directly through the basement wall, using PVC or ABS plastic pipe. Your contractor will advise you of any venting changes required.

Installation

  • If you already have a natural gas furnace, the installation will take a day or two. If you are installing natural gas for first time, sign up for a Union Gas account while your contractor arranges for the installation of your service through Union Gas. See switching to natural gas for more information.
  • After installation, your contractor should review safety and maintenance information along with the owner's manual that comes with your new furnace.

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