Garage Heater Guide for Sherwood Park Homeowners: Gas vs Electric, Sizing, and What to Expect
In most of Canada, a heated garage is a convenience. In Sherwood Park — where January temperatures regularly drop below -20°C and wind chills push that further — it is closer to a necessity.
Whether you are working in the space, protecting vehicles from the cold, running a small workshop, or simply trying to make sure your pipes don’t freeze, the right garage heater makes the difference between a usable space in winter and one that sits unused for five months of the year.
This guide covers everything Sherwood Park homeowners need to know before installing a garage heater: the two main system types, how to determine the right size for your space, what the installation involves, and what to watch for if your existing heater is showing signs of trouble.
Gas vs Electric: The Core Decision
The first and most consequential decision in choosing a garage heater is fuel type. Both gas and electric heaters have genuine advantages, and the right choice depends on your garage’s existing infrastructure, how you plan to use the space, and how the garage is positioned relative to your home’s gas supply.
Gas garage heaters use natural gas to produce heat through a burner assembly, distributing warmth either through a forced-air blower or through radiant infrared technology. They are the dominant choice for larger garages and workshops in Sherwood Park for several reasons:
- Heating capacity. Gas units are available in much higher BTU outputs than comparable electric heaters, making them capable of heating large two-car or three-car garages efficiently even in extreme cold.
- Operating characteristics. Gas heaters respond quickly — a forced-air unit reaches operating temperature within minutes and can meaningfully warm a large space in 15 to 20 minutes.
- Running costs. In Alberta, where natural gas rates have historically been lower than electricity rates, gas heaters are typically less expensive to operate over time for high-use applications.
The trade-offs: gas heater installation requires a licensed gas fitter to run a gas line to the garage (if one doesn’t already exist), install proper venting for combustion gases, and ensure the installation meets Alberta Safety Codes. The upfront installation scope is larger than a comparable electric unit.
Electric garage heaters use resistance heating elements — similar in principle to a large space heater — to warm the space. They are available in wall-mounted, ceiling-mounted, and portable configurations.
- Simpler installation. An electric heater installation requires a dedicated electrical circuit rather than gas line work and venting. In garages that already have adequate electrical service, this can be a significantly more straightforward project.
- Lower upfront scope. The installation does not require gas fitting work, which reduces both the complexity and the number of tradespeople involved.
- Better for smaller spaces. For a single-car garage used occasionally, an electric unit often provides sufficient heat without the infrastructure investment of a gas installation.
The trade-offs: electric heaters are generally limited in the output they can deliver per unit compared to gas, and in Alberta’s climate, heating a large garage with electricity in January requires substantial electrical capacity and tends to carry higher operating costs than gas.
Understanding BTUs: Sizing Your Heater for the Space
A garage heater that is too small for the space will run continuously without ever making the garage genuinely comfortable. A heater that is oversized may be more capable than needed and wastes both equipment capacity and energy.
Proper sizing requires calculating the heat loss of the space — how quickly the garage loses heat to the cold outside — which depends on:
Floor area. The square footage of the garage is the starting point, but not the whole picture.
Ceiling height. A garage with standard 8-foot ceilings has a smaller air volume to heat than one with a 12-foot ceiling. High-bay garages with vaulted ceilings require significantly more heating capacity than standard-height spaces of the same floor area.
Insulation. An uninsulated garage loses heat dramatically faster than an insulated one. A typical uninsulated single-car garage in Sherwood Park may require two to three times the BTU output of a well-insulated equivalent to maintain the same interior temperature on a cold day.
Door type and number. Garage doors are significant sources of heat loss, particularly older single-pane steel doors without insulation. Large bay doors in workshop settings are major factors in heat load calculations.
Desired interior temperature. There is a meaningful difference between keeping a garage at 5°C (just above freezing, sufficient to protect pipes and vehicles) and maintaining it at 15–18°C (comfortable for working in coveralls). The target temperature affects the BTU requirement significantly.
A rough industry guideline for basic estimation is 30 to 60 BTUs per cubic foot of space for an uninsulated Alberta garage. A licensed HVAC technician can calculate this accurately for your specific space.
What the Installation Involves
Gas heater installation in Sherwood Park requires:
- A gas line run to the heater location, sized for the unit’s BTU demand — this involves a licensed gas fitter
- A venting system appropriate for the heater type: forced-air units typically use a power-vent or direct-vent configuration; infrared radiant heaters typically use a direct flue to exterior
- Proper clearances from combustible materials, as specified by the manufacturer and Alberta Safety Codes
- Electrical connection for the thermostat, ignition, and blower (where applicable)
- A post-installation inspection and combustion test to verify safe operation
Electric heater installation requires:
- A dedicated electrical circuit sized for the heater’s amperage draw, run from the main panel
- Proper mounting at the manufacturer’s specified height and clearances
- Thermostat wiring where the unit uses a separate thermostat rather than an integrated control
Both types of installation should be completed by licensed tradespeople and inspected to Alberta safety code standards before use.
Signs Your Existing Garage Heater Needs Attention
If you already have a garage heater installed, these are the warning signs that it needs service:
The unit ignites but shuts off shortly after starting. This is one of the most common fault patterns in gas garage heaters and typically indicates a problem with the flame sensor — a component that confirms combustion is occurring before allowing the gas valve to stay open. The sensor accumulates residue over time and can be cleaned or replaced during a service call.
Unusual smells during operation. A faint gas smell at startup that clears within a minute can be normal. A persistent gas smell, or any smell of burning plastic or scorched metal, requires immediate attention.
The heater is not reaching the set temperature. May indicate a dirty or failing heat exchanger, a partially blocked flue, a failing thermostat, or — in the case of an electric unit — a failing heating element.
Visible rust, corrosion, or soot deposits on the unit body. These indicate either moisture exposure (often from an inadequate installation location or a leak in the building envelope) or combustion problems that need to be assessed by a technician.
The unit is over 15 years old and making unusual sounds. Older gas heaters can develop inducer motor wear, heat exchanger deterioration, and gas valve issues. A professional inspection can determine whether continued operation is safe and practical.
Sherwood Mechanical Services: Garage Heater Installation and Service in Sherwood Park
A garage heater installed correctly by a licensed team — properly sized, properly vented, and properly connected — will provide reliable winter warmth for 15 to 20 years with minimal intervention beyond basic annual maintenance.
Sherwood Mechanical Services provides garage heater installation for homeowners and property owners across Sherwood Park, Ardrossan, Ft Saskatchewan, and Strathcona County. We handle the full scope of the installation — gas line work, venting, electrical connections, and post-installation testing — so the finished system is safe, code-compliant, and performing at its rated capacity.
If you are ready to make your garage usable through Alberta’s winters, contact our team to discuss sizing and installation options.