Can I use a waste oil heater in my garage legally in New Brunswick?

Waste oil heaters occupy a legal grey zone in New Brunswick — they are not outright banned, but getting one properly permitted and installed is significantly more complicated than most homeowners expect, and many municipalities will not approve them at all.

Here is what you need to know before buying one.

The Regulatory Landscape in NB

Waste oil heaters (also called used oil burners) burn reclaimed motor oil, transmission fluid, and hydraulic fluid. In New Brunswick, any fuel-burning appliance installed in a garage must comply with the NB Building Code, the NB Fire Prevention Act, and local municipal fire and zoning bylaws. The appliance itself must be CSA-certified or ULC-listed — uncertified units imported from the US or purchased through grey-market suppliers are not legally installable in NB, full stop.

The challenge is that very few waste oil heater models carry CSA or ULC certification. The Clean Burn and EnergyLogic brands are the most commonly cited units with North American certification, but availability through NB suppliers is limited and pricing is significant — expect $3,000-$6,000 for the unit alone before installation.

Environmental and Fire Code Considerations

The New Brunswick Department of Environment and Local Government regulates used oil handling. Waste oil stored on your property for burning is considered a regulated material. You are generally permitted to burn oil you generated yourself (from your own vehicles), but purchasing, collecting, or accepting used oil from others crosses into regulated waste management territory that requires proper authorization. Storing more than a certain volume on-site may also trigger additional requirements — this is worth a direct call to the NB Department of Environment before you proceed.

From a fire code standpoint, waste oil heaters require a dedicated fuel storage tank (typically wall-mounted, ULC-listed), proper clearances from combustibles, a correctly sized flue and chimney, and in many cases a fire suppression system depending on the garage's occupancy classification. Your local fire marshal's office or municipal building department is the right first call — requirements vary between Moncton, Saint John, Fredericton, and rural municipalities.

Installation Requirements

Even if you get the unit approved, installation must be done by a licensed heating contractor, and you will need both a building permit and likely a mechanical permit. The flue must be properly sized, insulated, and terminated above the roofline according to manufacturer specifications and the NB Building Code. The unit must sit on a non-combustible pad with proper clearances on all sides.

Your garage must also be ventilated. Waste oil heaters produce combustion gases and require adequate combustion air supply — a sealed, tightly insulated garage is not appropriate without engineered ventilation. A carbon monoxide detector is essential and should be considered mandatory regardless of what the code minimum requires.

Practical Tips

Before spending any money, make three calls: your local municipal building department (to ask whether waste oil heaters are permitted in your zone and what permits are required), the NB Department of Environment (to clarify used oil storage and burning regulations for your situation), and your home insurance provider (some insurers will not cover a property with a waste oil heater, or will require a specific rider — find this out before installation, not after a claim).

If the permitting process proves too complex, a natural gas or propane unit heater is a far simpler path to a heated garage in NB. Installed costs run $1,500-$3,500, they are straightforward to permit, and licensed gas fitters are widely available across the province. For a workshop where you generate your own used oil, the waste oil route can make economic sense over time — but only if you can get it properly approved and installed.

For help finding licensed heating and mechanical contractors in New Brunswick, browse the New Brunswick Construction Network directory at newbrunswickconstructionnetwork.com.