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Commercial · Hair Salons, Nail Salons & BarbershopsHair Salon, Nail Salon & Barbershop HVAC
For hair salon, nail salon and barbershop HVAC, the starting point is exhaust: fumes and dust are captured where they are made — at the manicure table, the pedicure chair and the colour-mixing counter — and sent outdoors, and the same volume of tempered air is brought back in. The rule for every plaza unit is that air out must equal air in, or the exhaust stops working and the odour travels. After that come the cooling load from dryers and hot tools, the water heater behind the shampoo sinks, and filters that need changing every month.
Nail work is the heavy case. Acrylic filing throws fine dust and the liquids give off solvent vapour at table height, right where the technician and the client are breathing, so a ceiling fan across the room does very little. Source capture means a ducted exhaust inlet at each manicure and pedicure station — a downdraft table or a capture arm — connected to a fan that discharges outdoors, plus an exhaust pickup over the colour-mixing area in a hair salon. ASHRAE 62.1, the ventilation standard the Ontario Building Code points to, gives beauty and nail salons their own minimum exhaust rate by floor area on top of outdoor air per person, so this is a design requirement and not an upgrade.
Exhausted air must be replaced, and in a plaza unit that is where installations go wrong. A salon that exhausts without replacement air goes negative: the front door gets hard to pull open, the fans move a fraction of their rated air against that suction, and the vapour that was supposed to leave lingers and drifts through the shared ceiling space and gaps in the demising wall. Neighbours get it a second way when the exhaust discharges on the roof beside their unit's fresh-air intake. The fix is tempered make-up air or an energy recovery ventilator on the general ventilation, sized so the unit sits neutral, with the station exhaust on its own duct and discharged away from any intake.
The comfort load is higher than the floor area suggests. Hood dryers, blow dryers, flat irons and curling irons all put dry heat into the room, the storefront glass adds sun, and a Saturday puts a person in every chair, so a unit sized like a clothing store falls behind by noon. Hot water is its own calculation: the shampoo sinks, not the washroom, set the water heater size, based on how many bowls run back to back in the busiest hour — see commercial water heater replacement. Hard water in Halton and Hamilton scales those heaters, which shows up as hot water that runs out a little earlier every year.
Hair and nail dust load filters faster than almost any other storefront use. Clippings, product overspray and filing dust mat the filter face in weeks, then the cooling coil ices or the heat section overheats, so change filters monthly or put them on a commercial filter change schedule. A barbershop has the hair and the heat without the solvent load, and usually needs that filter discipline and good general ventilation, not station exhaust. New exhaust, make-up air and roof penetrations are permit work with the municipal building department and need the landlord's sign-off; start with commercial HVAC, or contact the shop with your station and sink count.
Equipment we install and service
Downdraft tables or capture arms at each manicure and pedicure station, ducted to an exhaust fan that discharges outside. Capture works only within a short distance of the inlet, so the inlet goes at the work surface and the airflow at each station is measured after installation.
The equipment that replaces what the exhaust removes. A small tempered make-up air unit suits a nail salon with many stations; an ERV on the general ventilation suits a hair salon. Chemical-laden station exhaust bypasses the ERV core and goes straight out.
Cooling selected on the real heat sources: dryers, irons, lighting, glass and a full Saturday book. Supply air is directed at the styling and dryer stations where the heat is produced, and kept from blowing directly on clients at the shampoo bowls.
A tank with fast recovery or a tankless unit sized to the number of bowls in use at once, plus the towel laundry if it is on site. Scale from hard water is the main enemy, so a flush is part of the yearly service.
What goes wrong in these buildings
- The clinic next door complains about the acrylic smell every week and the landlord forwards the emails to me.
- Staff have headaches by mid-afternoon on busy days.
- The front door whistles and is hard to pull open when the fans are on.
- It is 27°C at the dryer stations while the reception desk is comfortable.
- We run out of hot water at the sinks before noon on Saturday.
- The air conditioner iced up twice last summer and both times the filter was grey with hair.
How it works
Manicure and pedicure stations, the colour-mixing area, shampoo bowls, dryers and seats, then the existing unit, its outdoor-air setting and where anything currently exhausts. The count sets the exhaust volume, and the exhaust volume sets everything that follows.
Station exhaust, general ventilation and make-up air are drawn on one sheet with the roof discharge located away from neighbouring intakes. The landlord and the building department see the same drawing, which shortens both approvals.
Ceiling and roof work is booked for closed days. At the end we measure exhaust at each station, check that the front door opens normally with every fan running, and walk the owner through filter sizes and the monthly change.
Common questions
Is a ceiling exhaust fan enough for a nail salon?
No. A ceiling fan pulls vapour and dust up past the faces of the technician and the client before removing it, and by then it has mixed into the room. Capture at the table removes it before it spreads. Tabletop units that only filter and recirculate reduce dust but do not replace exhaust to the outdoors.
Do I need a permit to add salon ventilation in a plaza unit?
Generally yes. Adding or changing exhaust and make-up air alters the ventilation of the space, which is Ontario Building Code permit work through the municipal building department. The landlord's written approval comes first, and most landlords require their own roofer to flash any new roof opening so the roof warranty stays valid.
Why does my salon smell stronger in winter?
Three things change. The door stays shut, the rooftop unit's outdoor-air damper sits at minimum or has been closed to save gas, and exhaust fans that depended on an open door for replacement air are now starved. The fix is to supply the replacement air deliberately and warm it, so ventilation does not depend on the weather.
How large a water heater does a salon need?
Size it on the busiest hour: the number of shampoo bowls running back to back, the flow rate of the sprayers, the towel washer if there is one, and winter inlet water temperature, which cuts what a tankless unit can deliver. We work that out on site and put the recommendation and the price in a written quote.
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