New Brunswick · Energy · checked September 28, 2026

Combustion safety testing in Fredericton

A combustion safety test checks that your furnace, water heater and fireplace vent their exhaust outside instead of into the house, which matters most right before and after you tighten the house up.

Get matched in Fredericton → The combustion safety and spillage check
A gloved hand inserting a combustion analyzer probe into a furnace flue pipe in a basement

Cost

Included with an evaluation

Natural gas heat

Not published

Gas distributor

Liberty Utilities (Gas New Brunswick)

CO alarms required (existing homes)

None found

Install them anyway: they are the backstop

How Fredericton is built

Fredericton's houses by when they were built Ten house shapes, one for each tenth of Fredericton's 18,140 houses. Before 1961: 23%, 1961–1990: 43%, 1991–2000: 11%, 2001 or later: 23%. Older houses glow hotter.
  • Before 1961 23%
  • 1961–1990 43%
  • 1991–2000 11%
  • 2001 or later 23%
Each house stands for one in ten of Fredericton's 18,140 houses (single-detached, semi-detached, row and duplex), drawn by when it was built. The glow shows the usual pattern: older houses tend to be leakier and less insulated. More snow in the drawing means more heating degree-days: a longer, colder heating season. Sources: Statistics Canada 2021 Census (table 98-10-0233-01), NRCan HOT2000 climate data.

Why it matters in Fredericton

In the Fredericton area, 31% of households heat mainly with a heat pump and 30% with electric baseboards; electricity is the main heating energy for 43% of households (Statistics Canada, 2023).

The risk rises after air sealing: a tighter house plus a strong exhaust fan or dryer can pull exhaust back down a chimney. That's why advisors test for spillage during an evaluation and why it should be repeated after serious tightening.

The CO alarm rule in New Brunswick

We found no New Brunswick rule requiring CO alarms in existing homes; new construction follows the 2020 National Building Code.

What the check involves

  • Worst-case depressurization: exhaust fans and the dryer on, doors set to make the appliance room as negative as it gets.
  • A spillage and draft check at each appliance, with a CO reading.
  • A plan if anything fails: often a sealed-combustion appliance or a fix to the venting, done by a licensed gas or oil technician.

The combustion safety check in detail.

Atlantic Canada Maritimes and Newfoundland

What this means in Fredericton’s climate

Damp, windy, icy winters and costly oil: switch to heat pumps, seal, test for radon.

Why it matters here: Checks that the oil burner and chimney vent safely, especially once air sealing changes indoor air pressure.

Best timing: Before winter, and again after air sealing.

  • Plan your move off oil. Oil prices rose 65% to 81% in a year, and corrosion is a leading cause of oil tank leaks. Cold-climate heat pumps can be up to three times as efficient as oil heating. Ask: Ask the advisor to note your oil tank's age and condition, and to size a cold-climate heat pump with a backup plan.

What else homes in Fredericton need →

Sources for this climate guide · checked October 26, 2026

NRCan-licensed service organizations serving Fredericton

A service organization is a company that Natural Resources Canada (NRCan) licenses to deliver EnerGuide evaluations; its registered energy advisors do the home visit. Energy advisors check for combustion spillage during an evaluation; fixing a venting problem is work for a licensed gas or oil technician.

Source: NRCan list of licensed service organizations, checked September 28, 2026. Call to confirm your street is covered and ask about wait times.

Programs in Fredericton

Provincial · needs an evaluation New Brunswick Total Home Energy Savings Program Evaluation-first: $99 + HST covers both home energy evaluations, then published incentives such as $1,500 for a ducted heat pump, $0.40–$0.85 per sq ft for attic insulation and $250–$550 for air sealing Open

Combustion safety test in Fredericton: common questions

Are CO alarms required in Fredericton homes?

We found no New Brunswick rule requiring CO alarms in existing homes; new construction follows the 2020 National Building Code.

Who does combustion safety testing?

Energy advisors check for spillage during an EnerGuide evaluation. Repairs to venting or appliances are done by a licensed gas or oil technician.

I have CO alarms. Isn't that enough?

Alarms warn you once CO is already in the house. A spillage test finds a venting problem before it produces CO.

Combustion safety test near Fredericton

Combustion safety test in Saint John81 kmCombustion safety test in Moncton140 kmCombustion safety test in Charlottetown274 kmCombustion safety test in Halifax275 kmCombustion safety test in Lévis364 km All 70 cities →

Sources

Checked September 28, 2026. Census figures are for the municipality (New Brunswick); climate data is NRCan's HOT2000 station Fredericton (11 km away).

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