Maintaining your tankless water heater

Maintaining your tankless water heater

Maintaining your tankless water heater

Tankless water heaters, also referred to as on-demand or instantaneous, are becoming more common in Canadian households. They’re great for small spaces and offer efficiencies as high as 98 per cent. Better yet, a well-maintained tankless water heater can last about 20 years*—some manufacturers even offer 25-year limited warranties.

A tankless water heater doesn’t store water like a standard storage tank water heater. It heats the water only as it’s needed. Smaller than a storage tank, it can be hung on a wall.

In comparison, standard storage tank water heaters only last between 10 and 13 years. To ensure you get the most out of your tankless water heater have it serviced annually by a licensed gas contractor.

What should a tankless water heater service include?

  • checking operating and safety controls
  • testing ignition device and burner operation, clean as required
  • examining vent connector and venting system
  • flushing out heat exchanger as per manufacturer’s instructions to remove hard-water deposits as any scale build-up may cause damage to the heat exchanger


Tankless water heater safety tips

  • Inspect and keep the area around the water heater clear and free of flammable items, such as laundry, papers, boxes, solvents, propane cylinders or gasoline-powered equipment.
  • Check the fresh air supply vent (outside) for blockage such as dust, garden debris, snow, etc. and remove build-up with a vacuum cleaner or damp towel.
  • Wipe the outside surface with a damp towel to remove dust.

When to call a professional

Call a licensed gas contractor for service if you notice these signs of trouble with your natural gas tankless water heater:

  • water leaking from the unit or piping
  • dust or soot around the exhaust vent at the top of the unit
  • abnormal sounds during operation