Service / Commercial HVAC
The mechanical side of a cold-storage build: rooftop condensing units, remote racks, refrigerant line sets, make-up air for the kitchen next door, and the gas line to a heated loading dock. WFE installs it with the same crew that builds the box, commissions it with 313A-licensed refrigeration mechanics, and puts it on one quote. Commercial and industrial sites only, from a single restaurant walk-in to a distribution freezer.
Scope
Every walk-in, cold room, and refrigerated building needs some of this. WFE builds the box and installs the machinery around it.
Copeland and Tecumseh compressors, Heatcraft and KeepRite evaporators, sized to the real heat load of the room. We run the line set, set the expansion valve, pull the vacuum, weigh in the charge, and record it on the build sheet. The same scope covers a replacement system on a walk-in someone else built.
Walk-in cooler buildsOutdoor condensing units on isolators or a curb, roof penetrations flashed and sealed, and head-pressure control so the system runs through an Ontario January. Multi-compressor racks and remote condensers for warehouse-scale cold storage are engineered per site and installed by our crew.
Custom cold storageA commercial kitchen beside a new walk-in needs balanced make-up air and exhaust so the cooler door is not fighting negative pressure. Heated loading docks and unit heaters on a freezer receiving bay are gas-fired, and the gas piping is run by G1 and G2 licensed gas fitters on the crew.
Walk-in freezer buildsSystems we install
Product load, door cycles, ambient, and defrost all go into the calculation before a condensing unit is picked. Five systems, from one box to a building.
Walk-in cooler, +1°C to +4°C
Self-contained or remote condensing unit, single or twin-fan evaporator
Medium-temp, R-448A or R-449A, TXV metered
Walk-in freezer, −18°C to −23°C
Low-temp condensing unit, electric or hot-gas defrost evaporator
Head-pressure control, heated drain and door frame
Blast-freeze zone
Dedicated low-temp system sized to throughput, high-velocity coil
Built into a custom freezer, not a standalone cabinet
Cold room or process room
Remote condensing unit, multiple evaporators on one circuit
Washdown-rated coils where the room gets hosed down
Refrigerated warehouse
Multi-compressor rack, remote air-cooled condenser, long-throw evaporators
Engineered per site, staged install around racking
By project type
Who, what, and the paper
The three questions a facility manager, insurer, or inspector asks about mechanical work, answered before they ask.
Why WFE for the mechanical
On site
Real WFE installs across Ontario. No renders on this page.
A three-fan evaporator hung, piped, and drained. Coil selection follows the load calculation, not the catalogue page.
Insulated suction and liquid lines routed to the roof. Every joint brazed under nitrogen and pressure-tested before the charge goes in.
Twin evaporators on one low-temp circuit, drains heat-traced, box pulled down to temperature before handover.
Deep Dive
A commercial refrigeration contractor owns the whole cold chain on a build: the insulated envelope, the refrigeration system, and the mechanical services that keep both running. WFE has supplied and installed 2,000+ walk-ins across Ontario on that basis, with in-house crews rather than a chain of trades.
The HVAC scope on a walk-in is smaller than people expect and easy to get wrong: a condensing unit sized off square footage instead of product load, a drain line that freezes in a freezer, a cooler door fighting a kitchen exhaust hood. Our walk-in cooler and walk-in freezer pages cover the box; this page covers the machinery around it.
Industrial refrigeration means multi-compressor racks, remote condensers, long-throw evaporators, and a commissioning plan that brings a 10,000 sq ft freezer down zone by zone. WFE engineers those systems per site and installs them with the same crew that hangs the panels, which is why the custom cold storage page and this one are read together.
On a distribution or processing site the mechanical scope widens: heated docks so receiving doors do not ice, make-up air for the packing line, washdown-rated coils in rooms that get hosed down nightly. All of it is quoted on the same PO as the envelope.
Make-up air for a commercial kitchen replaces the air the exhaust hood pulls out. Without it the kitchen runs at negative pressure, the walk-in door drags, warm air is pulled into the box every time it opens, and the refrigeration runs longer than it should. We size the make-up air unit to the hood, balance it, and tie the controls together.
Heated loading docks and unit heaters on a freezer receiving bay keep the dock plate and door seals clear in winter. They are gas-fired, piped by G1 and G2 licensed gas fitters on the crew, and inspected before the first delivery. Ask about commercial plumbing for the drains and water on the same site.
FAQ
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We visit your location and measure. No assumptions, no surprises.
In-House Crews Only
Our long-tenured in-house team does the install. No third-party subcontractors.
Custom-Designed to Your Floor Plan
Every unit engineered to your exact dimensions, not pulled from a catalog.
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