Replacing an existing bathroom exhaust fan in Ottawa costs about $350 to $650 in 2026, while installing a brand-new fan where none exists runs roughly $650 to $1,200 once ducting, electrical, and drywall work are included. A straight swap where the new unit fits the old housing and duct is the cheapest scenario — often two to three hours of labour plus a $90 to $250 fan. Costs climb when the fan must be vented properly to the exterior: a new insulated duct run through an Ottawa attic with a roof or soffit cap typically adds $250 to $500, and running a duct through a second-storey ceiling with ...
There are three common scenarios and each has a distinct price band. A like-for-like replacement, where the new fan mounts into the existing housing and connects to the existing duct, costs $350 to $650 installed including a decent 80–110 CFM unit. A replacement that requires a new housing — because the old fan is an obsolete size or the housing is rusted — costs $500 to $850, since the contractor must open and patch the ceiling drywall. A completely new fan in a bathroom that has never had one ...
If you are replacing fans in two or three bathrooms during the same visit, expect the per-fan price to drop 15 to 25% because setup, ladder work, and trip charges are shared. Bundling is worth planning if fans across the house are aging out.
A bathroom fan must exhaust to the outdoors — never into an attic, soffit cavity, or crawl space. In Ottawa, this rule has teeth: warm, humid shower air hitting a −20°C attic condenses and freezes on the underside of the roof deck, then thaws in a January mild spell and drips onto the ceiling below. Homeowners often mistake this for a roof leak. Proper installation uses smooth-wall or insulated flexible duct, kept as short and straight as practical, sloped slightly toward the exterior, with an i...
Peeling paint, a musty smell after showers, black spotting near the ceiling, and frost or damp insulation in the attic above the bathroom all point to a fan that is either undersized or vented into the attic. Fixing the duct matters more than buying a fancier fan.
The Ontario Building Code requires mechanical ventilation in bathrooms, and the common benchmark for a residential bathroom fan is a minimum of 50 CFM for intermittent exhaust, with 80 to 110 CFM being the practical choice for most Ottawa bathrooms. A simple sizing rule for bathrooms up to 100 square feet is 1 CFM per square foot, with a minimum of 50 CFM. For larger bathrooms or those with a separate enclosed shower, jetted tub, or water closet, add roughly 50 CFM per fixture — a 120 sq ft ensu...
A straightforward fan replacement using the existing circuit generally does not need a building permit in Ottawa, but any new electrical circuit, new switch leg, or new wiring must be done by a licensed electrical contractor and filed with the Electrical Safety Authority under the Ontario Electrical Safety Code. Fan-light-heater combination units almost always need a dedicated circuit because of the heater draw, which means an ESA notification and a panel breaker — budget $350 to $800 for that c...
Ask for a written quote that names the fan model and CFM rating, the sone level, the duct diameter and material, the termination type (roof, soffit, or sidewall), whether insulation is included on the duct run, and who handles drywall patching and paint. Get at least two or three quotes; for a single fan swap, expect a service-call minimum, so it makes financial sense to bundle the fan with other small electrical or handyman items on the same visit. The biggest cost saver is timing: if you are a...
In 2026, a like-for-like fan replacement costs about $350 to $650 installed in Ottawa, while a brand-new fan in a bathroom that never had one runs roughly $650 to $1,200 once ducting, electrical, and drywall patching are included. Fan-light-heater combos with a dedicated circuit can exceed $1,500.
A straight swap into an existing housing and duct typically costs $350 to $650, including a decent 80 to 110 CFM fan and two to three hours of labour. If the old housing must be replaced, add $150 to $250 for the ceiling opening and drywall patch.
No. Bathroom fans must exhaust to the outdoors. Venting into an Ottawa attic causes moisture to condense and freeze on the roof deck in winter, then drip onto ceilings during thaws, leading to staining, damaged insulation, and mould. Proper installation uses insulated duct and an exterior cap with a backdraft damper.
Use about 1 CFM per square foot with a 50 CFM minimum for bathrooms up to 100 sq ft, so most Ottawa bathrooms suit an 80 to 110 CFM fan. For larger ensuites, add roughly 50 CFM for each separate enclosed shower, jetted tub, or water closet.
A simple replacement on an existing circuit usually does not require a building permit, but any new circuit or wiring must be done by a licensed electrical contractor and filed with the Electrical Safety Authority. Larger bathroom renovations involving plumbing or structural work do require a building permit.