# Commercial HVAC Mississauga | Repair, RTUs & Refrigeration

> Commercial HVAC in Mississauga for Square One offices, Dixie-Mavis industrial, Streetsville retail and Pearson-area warehouses. RTU programs, 24-hour dispatch.

URL: https://torontocommercialhvac.ca/locations/mississauga/

Local Commercial Dispatch, 24 Hours

# Commercial HVAC in Mississauga: Square One Offices, Dixie-Mavis Industrial & Pearson Warehouses

Last updated: October 10, 2026

Mississauga is rooftop unit country: low-rise industrial parks along Dixie and Mavis, multi-tenant flex buildings near Pearson and retail strips in Streetsville. Office towers around Square One add VAV and BAS work.

Commercial-only HVAC and refrigeration for Toronto buildings: TSSA G1+G2, ESA and 313A licensed, 2-4 hour emergency response, written reports on every visit.

-   2-4 hour emergency response
-   Crews staged off Highway 401 and 403
-   14-RTU program, $420K

Call (437) 524-2997

[tel:+14375242997 →](tel:+14375242997)

 

Request Service

[/contact/ →](/contact/)

![Commercial HVAC technicians servicing rooftop equipment in Mississauga](/images/misc/two-commercial-hvac-technicians-in-hard-hats-servi.webp)

20+

Years Commercial-Only

1,400+

RTUs Under Contract

85+

Chiller Plants on PM

Commercial Credentials & Verification

TSSA G1 + G2

Licensed Gas Technicians

ESA

Electrical Safety Authority

313A Refrigeration

Licensed Refrigeration Mechanics

$5M CGL + WSIB

Enbridge-Authorized Since 2006

2-4 Hour Emergency Response 90-Day Labour Warranty on Repairs / 2-Year on Installs 5-Star Commercial Satisfaction 20+ Years Commercial-Only

Sound Familiar?

## Rooftop Unit and Heating Trouble in Mississauga?

### Heater lockouts in cross-dock warehouses beside Pearson

Unit heaters lock out on cold mornings, dock areas fall to single digits and forklift crews work in jackets.

Pearson moves roughly half of Canada's air cargo, and the Gateway warehouses around it keep dock doors open for long shifts. Suspended unit heaters and RTU heat sections cycle hard, and low-hung venting takes forklift hits.

Commercial heating repair covers venting, ignition and heat exchangers with combustion and CO testing, and RTU replacement plans handle units past end of life.

### Downtime Costs Real Money

A warm walk-in or a tripped chiller turns into lost product, tenant calls and refunds within hours.

### The Wrong Licences

Large gas appliances, refrigeration circuits and high-voltage controls need TSSA G1/G2, 313A and ESA tickets on one crew.

### Repeat Visits, Same Fault

Parts-swapping without a root cause means the same unit fails again next month.

### No Paper Trail

Insurers, boards and landlords want written findings, readings and photos, not a verbal "it is old".

Local Knowledge

## Commercial HVAC Know-How From Square One to Meadowvale

Mississauga runs on rooftop units. The industrial parks along Dixie Road and Mavis Road, the flex buildings around Pearson and Airport Road, and the plazas in Streetsville and Meadowvale Business Park carry thousands of packaged RTUs, many installed in the 1990s and 2000s and now at or past end of life.

That is why our work here leans toward RTU programs: audits, 

ranked replacement plans

[/commercial-hvac-replacement/ →](/commercial-hvac-replacement/)

 and 

Sunday crane days

[/rooftop-unit-installation/ →](/rooftop-unit-installation/)

. Our 14-RTU industrial park program replaced 14 Carrier 48TC units for $420,000 in six weeks with zero tenant downtime.

The Gateway warehouses around Pearson, which handles roughly half of Canada's air cargo, keep dock doors open for long shifts, so 

unit heaters and RTU gas heat

[/commercial-heating-repair/ →](/commercial-heating-repair/)

 work harder than in most buildings. Around Square One, open since 1973 and soon on the Hurontario LRT, office towers add VAV, BAS and chiller work.

Districts We Cover

-   Mississauga Executive Centre
-   Square One office cluster
-   Dixie-Mavis industrial
-   Streetsville retail
-   Pearson-area warehouses

Postal codes we cover: L5B, L4Z, L4W, L4X, L5C, L5M, L5N, L5P, L5S, L5T

Local Landmarks & Corridors

-   Hurontario LRT
-   Airport Road
-   Meadowvale Business Park
-   Highway 401
-   Highway 403
-   Square One

Highway 401 and 403 cross the city, with Airport Road serving the Pearson warehouse belt and the Hurontario LRT under construction through City Centre.

Top Services

## What We Fix, Replace and Maintain

### 

Rooftop Unit Installation

[/rooftop-unit-installation/ →](/rooftop-unit-installation/)

$18K-$95K/unit

RTU new installs, swaps and capacity upgrades. $18K-$95K per unit.

View service

[/rooftop-unit-installation/ →](/rooftop-unit-installation/)

### 

Commercial Heating Repair

[/commercial-heating-repair/ →](/commercial-heating-repair/)

$185+ diag

Heating repair for boilers, radiant heaters, RTU heat sections and MUA. $450-$4,500.

View service

[/commercial-heating-repair/ →](/commercial-heating-repair/)

### 

Rooftop Unit Repair

[/rooftop-unit-repair/ →](/rooftop-unit-repair/)

$185+ diag

RTU repair for all major manufacturers, 3 to 150 tons. $450-$5,500.

View service

[/rooftop-unit-repair/ →](/rooftop-unit-repair/)

### 

Commercial HVAC Replacement

[/commercial-hvac-replacement/ →](/commercial-hvac-replacement/)

$12K-$680K

End-of-life replacement for 15+ year buildings with reserve-fund documentation per unit.

View service

[/commercial-hvac-replacement/ →](/commercial-hvac-replacement/)

### 

Commercial Furnace Repair

[/commercial-furnace-repair/ →](/commercial-furnace-repair/)

$185+ diag

Repair for RTU gas heat sections, suspended unit heaters and industrial warm-air. $450-$3,500.

View service

[/commercial-furnace-repair/ →](/commercial-furnace-repair/)

### 

Commercial HVAC Maintenance

[/commercial-hvac-maintenance/ →](/commercial-hvac-maintenance/)

$185+/visit

PM contracts: quarterly, semi-annual or monthly, with a written condition report every visit.

View service

[/commercial-hvac-maintenance/ →](/commercial-hvac-maintenance/)

### 

Commercial AC Repair

[/commercial-ac-repair/ →](/commercial-ac-repair/)

$185+ diag

Cooling-side repair for RTUs, splits, VRF and chilled water fan coils. $450-$3,500.

View service

[/commercial-ac-repair/ →](/commercial-ac-repair/)

### 

Commercial BMS & HVAC Controls

[/commercial-bms-controls/ →](/commercial-bms-controls/)

$15K-$180K

BMS install, retrofit and programming for towers, institutions and industrial sites. $15K-$180K.

View service

[/commercial-bms-controls/ →](/commercial-bms-controls/)

### 

Make-Up Air Unit Service

[/make-up-air-unit-service/ →](/make-up-air-unit-service/)

$185+ diag

MUA repair, maintenance and replacement for kitchens, industrial and parking garages.

View service

[/make-up-air-unit-service/ →](/make-up-air-unit-service/)

### 

24-Hour Emergency Commercial HVAC Repair

[/emergency-commercial-hvac-repair/ →](/emergency-commercial-hvac-repair/)

$185 surcharge

24-hour emergency dispatch across Toronto and the GTA with 2-4 hour response.

View service

[/emergency-commercial-hvac-repair/ →](/emergency-commercial-hvac-repair/)

Process

## How a Service Call Works, Step by Step

1.  01
    
    ### Call or Request
    
    Call (437) 524-2997 or send the building details. Dispatch confirms the arrival window and site access.
    
2.  02
    
    ### Diagnose
    
    A licensed technician traces the root cause across electrical, airflow, combustion and refrigerant circuits.
    
3.  03
    
    ### Written Quote
    
    Findings, photos and a fixed price before any work starts. No surprise line items.
    
4.  04
    
    ### Fix and Document
    
    Most repairs close on the first visit from truck stock, followed by a written completion report.
    

## RTU Down Near Pearson or Square One? We Dispatch 24/7

2-4 hour emergency response, 24 hours a day. $185 diagnostic with written findings, waived on approved repairs over $750, and a 90-day labour warranty on every repair.

(437) 524-2997

[tel:+14375242997 →](tel:+14375242997)

 

Request Service

[/contact/ →](/contact/)

Local Logistics

## Reaching Sites Across the City Fast

Sites here sit along Highway 401 and Highway 403, which makes most of the city reachable inside our 2-4 hour emergency window even at rush hour. Crews heading to Pearson-area warehouses use Airport Road, and Square One office calls follow the Hurontario LRT corridor.

Industrial parks along Dixie and Mavis have wide roads and good crane access, so multi-unit RTU replacements are efficient here. We book road permits for lifts where streets are narrower, such as older parts of Streetsville.

Winter cold-snap calls for 

unit heaters and RTU gas heat

[/commercial-heating-repair/ →](/commercial-heating-repair/)

 cluster in the Pearson warehouse belt, and we stage heating parts in advance.

![Service van and technicians unloading parts at a commercial site in Mississauga](/images/content/branded-commercial-hvac-service-van-parked-at-a-gt.webp)

Building Types

## Industrial Parks, Flex Buildings and Office Towers

**Dixie-Mavis industrial.** Single-storey buildings with banks of 

7.5 to 25-ton RTUs

[/rooftop-unit-repair/ →](/rooftop-unit-repair/)

, unit heaters and 

make-up air

[/make-up-air-unit-service/ →](/make-up-air-unit-service/)

 for production areas.

**Pearson-area warehouses and Meadowvale Business Park.** Large distribution buildings with radiant tube heaters, unit heaters and office RTUs. Venting damage from forklifts is a common heating issue.

**Square One and Mississauga Executive Centre.** Mid and high-rise offices with VAV, air handlers and BAS, where comfort tickets often trace back to 

failed VAV controllers

[/commercial-bms-controls/ →](/commercial-bms-controls/)

.

**Streetsville retail.** Plazas with tenant RTUs where cost allocation matters as much as the repair.

Seasonal Pressure Points From Pearson to Square One

Late spring and summer bring 

RTU compressor and fan motor failures

[/commercial-ac-repair/ →](/commercial-ac-repair/)

, and planned replacement crane days happen on spring and fall weekends. Winter brings unit heater lockouts and RTU gas heat failures in the warehouse belt, often from damaged venting and 

weak ignition parts

[/commercial-furnace-repair/ →](/commercial-furnace-repair/)

.

Why Us

## Why Property Teams Along the 401 and 403 Choose Us

-   RTU programs with per-unit audits and ranked replacement plans
-   Sunday crane days with zero tenant downtime
-   Per-tenant cost allocation for plazas and flex buildings
-   Unit heater and radiant heater repair for Pearson-area warehouses
-   VAV and BAS work for Square One offices
-   2-4 hour emergency response along the 401 and 403

Local Track Record

## Recent Projects in the Area

![Crane lifting a new rooftop unit onto a Mississauga industrial building](/images/featured/crane-lifting-a-carrier-48tc-rooftop-unit-onto-a-m.webp)

[/projects/mississauga-industrial-park-14-rtu-replacement/ →](/projects/mississauga-industrial-park-14-rtu-replacement/)

Mississauga $420,000

### 

Mississauga Industrial Park 14-RTU Replacement Program

[/projects/mississauga-industrial-park-14-rtu-replacement/ →](/projects/mississauga-industrial-park-14-rtu-replacement/)

Fourteen ageing RTUs replaced building by building on Sunday crane days, with a recalculated load for each tenant space and zero tenant downtime across the six-week program.

Replacement 

Case study

[/projects/mississauga-industrial-park-14-rtu-replacement/ →](/projects/mississauga-industrial-park-14-rtu-replacement/)

Client Feedback

## What Local Facility Teams Say

5-Star Commercial Satisfaction

> "Comfort tickets on our west side dropped to almost zero after they rebuilt the failing VAV boxes and retuned the BAS schedules floor by floor."

Rajesh Iyer

Facilities Manager, Square One area office building

VAV box repairs and BAS rebalancing on 6 floors$24,500

> "Compressor went in the middle of a heatwave. They had the part on the truck and the store was cool again by late afternoon."

Brenda Holt

Owner, Streetsville retail storefront

RTU compressor replacement in July$3,850

> "Six unit heaters were locking out every cold morning. They traced it to venting and ignition faults and documented every unit for our insurer."

Victor Almeida

Operations Manager, Pearson-area distribution warehouse

Ignition and venting repairs on 6 unit heaters$9,600

Straight Answers

## Common Questions From Mississauga Facility Managers

### How fast can you reach a site in Mississauga?

+

Crews staged off Highway 401 and 403 reach Dixie-Mavis, Pearson-area and Square One sites inside the 2-4 hour emergency window, day or night.

### Do you replace multiple rooftop units across an industrial park?

+

Yes. Our 14-RTU industrial park program replaced 14 Carrier 48TC units for $420,000 in six weeks with zero tenant downtime. Programs above 4 units get 10-15% off.

### Can you fix unit heaters in warehouses near Pearson?

+

Yes. Pearson handles roughly half of Canada's air cargo, and the Gateway warehouses around it run dock doors open for long shifts. That works suspended unit heaters and RTU heat sections hard, so we repair venting, ignition and heat exchangers with combustion and CO testing on every unit.

### Do you work on office buildings around Square One?

+

Yes. VAV boxes, air handlers, chillers and BAS for City Centre and Executive Centre offices, where comfort tickets often trace back to failed VAV controllers.

### What does RTU replacement cost in Mississauga?

+

Typically $18,000 to $95,000 per unit depending on tonnage, crane access and electrical scope, with a written per-unit quote before any crane is booked.

### Can you split repair costs between plaza tenants in Streetsville?

+

Yes. We confirm responsibility per unit with the landlord and write the cost allocation before work starts.

Coverage Map

## Where We Work in Mississauga

Nearby Areas

## We Also Serve Nearby

-   Commercial HVAC Brampton
    
    [/locations/brampton/ →](/locations/brampton/)
    
-   Commercial HVAC Etobicoke
    
    [/locations/etobicoke/ →](/locations/etobicoke/)
    

Every district listed here is covered by the same licensed crews behind our 

commercial HVAC Toronto

[/ →](/)

 service, across 20+ GTA cities. See every 

location we serve

[/locations/ →](/locations/)

.

![](/images/misc/two-commercial-hvac-technicians-in-hard-hats-walki.webp)

24-Hour Commercial Emergency Dispatch

## Get a Licensed Technician on Site in Mississauga

2-4 hour emergency response, 24 hours a day. TSSA G1+G2, ESA and 313A licensed technicians with written findings on every visit.

Call (437) 524-2997

[tel:+14375242997 →](tel:+14375242997)

 

Request Service

[/contact/ →](/contact/)

-   TSSA G1+G2, ESA, 313A
-   Written findings every visit
-   90-day / 2-year labour warranty