# Commercial RTUs Markham | Rooftop Units Toronto Pros

> Commercial rooftop units in Markham, ON by Rooftop Units Toronto Pros. Serving Highway 7 + 404 office parks. 24-hr quote. Red Seal crew.

URL: https://rooftopunitstoronto.ca/service-areas/markham/

![Packaged rooftop units on a GTA commercial roof at golden hour](/images/hero/row-of-packaged-rooftop-units-on-a-gta-commercial-.webp)

Serving Highway 7 and 404 corridor, Unionville, Cornell

# Commercial Rooftop Units in Markham, With Cooling Redundancy for Offices

Last updated: October 24, 2026

Markham's tech and office parks along Highway 7 and the 404 run multi-tenant mid-rises where a server room cannot lose cooling. We plan RTU redundancy, controls integration and quarterly maintenance around that.

-   2-4 hr on-roof (GTA core)
-   Dispatch via 404 / 407 / Hwy 7
-   24-hr written quote

Book a Site Assessment

[/contact/ →](/contact/)

 

(437) TBD

[tel:+14370000000 →](tel:+14370000000)

Book a Site Assessment

[/contact/ →](/contact/)

 

Call (437) TBD

[tel:+14370000000 →](tel:+14370000000)

-   24-Hour Written Quote (not a sales pitch)
-   24/7 Emergency RTU Dispatch (2-4 hr on-roof GTA core)
-   Red Seal HVAC-R + TSSA + ESA + CRE Chiller
-   $5M Liability + WSIB + COI in 24 Hours
-   Save on Energy Rebate Filed on Your Behalf

1,800+

GTA installs

97%

Uptime

2-4 hr

On-roof, GTA core

48

Sites under contract

Risk Disclosure

## Markham Rooftop Unit Problems That Take Tenants Offline

The local pattern

### Server rooms in district-energy buildings with no cooling of their own

**What you see:** The building is comfortable, but the tenant server room overheats on a weekend or after the building schedule sets back.

**Why it happens here:** Buildings in the city's downtown take chilled water from Markham District Energy instead of running their own chillers, and the air handling that delivers it follows the office schedule, not the 24/7 load of a server room added later.

**What we do:** We install a dedicated rooftop or split unit for the server room, tie its alarms into the BAS and add it to quarterly maintenance.

01

### Wrong diagnosis

A residential tech misreads a commercial economizer and replaces parts that did not need it. We megger windings and test controls before anyone quotes a compressor.

02

### Wrong equipment match

A contractor quotes a 5-ton split when the roof needs a 10-ton packaged unit. Manual J/S sizing and a curb check come before the quote, not after the crane.

03

### Wrong rebate math

Nobody files Save on Energy and the PM leaves $8K-$30K on the table. We lock the pre-approval before equipment is ordered and net it on the invoice.

Most requested here

## Cooling, Controls and Ventilation for Office Parks

The services these buildings call us for most. All 24 services are available, with the same published pricing as the rest of the GTA.

 

![Crane lowering a new packaged rooftop unit onto a roof curb in Toronto](/images/misc/mobile-crane-lowering-a-new-packaged-rooftop-unit-.webp) From $9,500

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

### 

Commercial Rooftop Unit Installation

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

New and added-capacity RTU installs sized with Manual J/S, crane coordinated, commissioned and signed off.

-   Manual J/S load sizing before quote
-   Crane, curb and roof reinforcement coordination
-   25/50/25 payment: order, install day, commissioning sign-off
-   Controls / BAS integration and commissioning report

Details + pricing

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

 

![Open commercial rooftop unit with clean coil and new filters during quarterly maintenance](/images/misc/clean-condenser-coil-and-fresh-merv-13-filters-in-.webp) From $240

[/commercial-rooftop-unit-maintenance-toronto/ →](/commercial-rooftop-unit-maintenance-toronto/)

### 

Commercial Rooftop Unit Maintenance

[/commercial-rooftop-unit-maintenance-toronto/ →](/commercial-rooftop-unit-maintenance-toronto/)

Quarterly RTU inspections with written reports, locked per-unit pricing and priority dispatch.

-   Quarterly inspections, written report per visit
-   Annual RTU maintenance $295-$450/unit/yr
-   Bulk 12+ units per site $240-$340/unit/yr
-   Priority dispatch + locked pricing for contract sites

Details + pricing

[/commercial-rooftop-unit-maintenance-toronto/ →](/commercial-rooftop-unit-maintenance-toronto/)

![Dedicated outdoor air system unit with energy recovery on a Toronto office roof](/images/misc/dedicated-outdoor-air-system-unit-with-energy-reco.webp)

[/doas-system-toronto/ →](/doas-system-toronto/)

### 

DOAS Systems

[/doas-system-toronto/ →](/doas-system-toronto/)

DOAS install and service with energy recovery for ventilation and IAQ upgrades.

-   DOAS purpose and sizing
-   Energy recovery wheel / core
-   MERV 13 filtration integration
-   Pairing with existing RTUs

Details + pricing

[/doas-system-toronto/ →](/doas-system-toronto/)

 

![Trane Voyager packaged rooftop unit on a Markham office roof](/images/misc/trane-voyager-packaged-rooftop-unit-on-a-markham-o.webp) From $9,500

[/trane-rooftop-unit-toronto/ →](/trane-rooftop-unit-toronto/)

### 

Trane Rooftop Units

[/trane-rooftop-unit-toronto/ →](/trane-rooftop-unit-toronto/)

Trane Precedent and Voyager RTUs with controls integration and OEM parts.

-   Precedent + Voyager models
-   ReliaTel controls diagnostics
-   BAS integration
-   OEM parts stocked

Details + pricing

[/trane-rooftop-unit-toronto/ →](/trane-rooftop-unit-toronto/)

 

![Commercial rooftop unit with an open panel under work lights at dusk in Toronto](/images/misc/service-van-headlights-and-a-commercial-rooftop-un.webp) From $425

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

### 

Emergency Rooftop Unit Repair

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

No-cool, no-heat and tripped-breaker calls answered by a Red Seal tech, not a call-centre ticket.

-   30-min dispatch window, 2-4 hr on-roof GTA core
-   Priority queue: restaurant, retail, dental, medical
-   Temp-cooling / temp-heating if not restorable same day
-   After-hours $280-$425/hr; call-out $425-$650

Details + pricing

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

Need something else? See 

all 24 commercial services

[/services/ →](/services/)

 or 

published pricing

[/pricing/ →](/pricing/)

.

How it works

## Our Markham Process, From Assessment to Commissioning

Five steps, the same on every job, from a single compressor to a multi-unit program.

1.  01
    
    ### Site assessment
    
    A Red Seal lead walks the roof, reads nameplates, checks curbs, access and electrical, and logs every symptom.
    
2.  02
    
    ### 24-hr written quote
    
    Parts, labour, crane, permit and HST on one line, plus the repair-vs-replace math when the unit is old.
    
3.  03
    
    ### Rebate pre-approval
    
    We file Save on Energy or Enbridge paperwork before equipment is ordered, so the rebate is locked in.
    
4.  04
    
    ### Install / repair
    
    WSIB crews, crane day and street-occupancy permits handled. Tenants get a schedule, not a surprise.
    
5.  05
    
    ### Commissioning sign-off
    
    Startup readings, controls check and a commissioning report you can file. Final 25% only after sign-off.
    

Standard 5-10 ton RTU: 3-5 business days from quote to startup.

## Server Room on the Line? Plan the Backup Now

Written quote within 24 hours, final 25% only after commissioning sign-off. Call (437) TBD.

(437) TBD

[tel:+14370000000 →](tel:+14370000000)

 

Emergency Service

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

Local proof

## Why Office Teams on Highway 7 Call Us

-   Cooling redundancy planning for server and telecom rooms
-   BAS integration on Trane, Johnson Controls Metasys and Honeywell
-   Authorized Trane dealer for Precedent and Voyager RTUs
-   DOAS installs for ventilation and tenant IAQ requirements
-   2-4 hr on-roof emergency response inside the GTA core
-   Quarterly maintenance with a written report per unit

Client Records

## What Local Clients Say

> "Our King West retail plaza had three RTUs down over a long weekend. First unit cooling by Saturday noon, all three up before Monday open. Written diagnostic same day."

PSPriya S.PM, King West retail

> "Three contractors quoted our 14-RTU Mississauga industrial park. Rooftop Units Toronto Pros was the only one who filed Save on Energy. Rebate captured $87K. Install 11 days, park running."

MKMichael K.Facility Ops, Mississauga Airport Rd

> "Our 42-storey Bay Street tower chiller rebuild needed CRE-ticketed techs + crane permits. Ran end-to-end including condo board comms. $148K retube, 9-day window, back on primary as promised."

JLJennifer L.Building Ops, Bay Street

Neighbourhoods + landmarks

## Where We Work in Markham

City of Markham (York Region)

-   Highway 7 and 404 corridor
-   Markham Centre
-   Unionville
-   Cornell
-   Woodbine Ave business parks

-   Highway 404
-   Highway 7
-   Markham Civic Centre

Postal codes (FSA) we cover: L3P, L6G, L6B

Local logistics

## Reaching the 404 and Highway 7 Parks

The city is inside our 2-4 hour GTA core response. Crews reach the **Highway 7 and 404 corridor**, **Markham Centre** and the **Woodbine Ave business parks** from the 404 and the 407, and **Unionville** and **Cornell** along Highway 7. The 404 southbound in the morning and northbound in the evening is the slow leg, so scheduled maintenance is booked mid-day.

Most office parks along the 404 have surface lots or loading areas suited to crane access, and lifts on private property rarely need a road permit. Multi-tenant buildings need tenant notice for shutdowns, and server-room tenants need a backup cooling plan before any RTU serving them is taken offline. We write that plan into the quote.

![Crane lifting a packaged rooftop unit onto a GTA commercial roof](/images/misc/crane-lifting-a-packaged-rooftop-unit-onto-a-flat-.webp)

View on Google Maps

[https://www.google.com/maps/dir/?api=1&destination=43.8561,-79.337 →](https://www.google.com/maps/dir/?api=1&destination=43.8561,-79.337)

Building familiarity

## Office Mid-Rises, Campuses and Plazas

-   **Multi-tenant office mid-rises** along Highway 7 and the 404: 10-25 ton 
    
    packaged RTUs
    
    [/packaged-rooftop-unit-toronto/ →](/packaged-rooftop-unit-toronto/)
    
     serving open floors, with small server or telecom rooms that need cooling 24/7.
-   **Tech campuses and business parks** on Woodbine Ave: larger RTU arrays, BAS integration on 
    
    Trane
    
    [/trane-rooftop-unit-toronto/ →](/trane-rooftop-unit-toronto/)
    
    , Johnson Controls or Honeywell platforms and 
    
    DOAS
    
    [/doas-system-toronto/ →](/doas-system-toronto/)
    
     units for ventilation.
-   **Markham Centre mixed-use:** podium RTUs and condo tower mechanical.
-   **Unionville and Cornell retail:** plaza RTUs in the 3-10 ton range.

The common thread is **cooling redundancy**. A single compressor failure on an RTU that also serves a server room can take a tenant offline. We look at N+1 options, dedicated ductless backup for server rooms, BAS alarms and 

quarterly maintenance

[/commercial-rooftop-unit-maintenance-toronto/ →](/commercial-rooftop-unit-maintenance-toronto/)

 so one failed part does not become a business outage.

Seasons on these roofs

## Seasonal Notes for Server-Room Loads

Server rooms need cooling in January too, so economizer controls and low-ambient kits matter more here than in a typical retail plaza. We check low-ambient operation and economizer changeover in fall. In summer, heat waves push multi-tenant 

commercial rooftop units

[/ →](/)

 to full load for days at a time, and that is when weak capacitors and dirty coils fail. Spring and fall quarterly visits cover both.

Published GTA pricing

-   RTU diagnostic (business hr)$275-$425
-   3-5 ton RTU installed$9,500-$16K
-   10 ton packaged installed$18K-$34K
-   Annual RTU maintenance$295-$450/unit

All price tables

[/pricing/ →](/pricing/)

Local questions

## Commercial RTU Questions From Markham Tenants

Still have a question?

A Red Seal lead answers, not a call centre. Written quote within 24 hours.

Book a Site Assessment

[/contact/ →](/contact/)

(437) TBD

[tel:+14370000000 →](tel:+14370000000)

### How fast is emergency response in Markham?

The city sits inside the GTA core, so dispatch works a 30-minute window and a tech is on the roof in 2-4 hours, 24/7, from the 404 and 407 to Unionville, Cornell and the Woodbine Ave parks.

### Our building is on the district energy loop. Who looks after the rooftop equipment?

Markham District Energy supplies chilled and hot water to the building, but rooftop units, DOAS and any dedicated server-room cooling on your roof are still yours to maintain. We service that equipment and coordinate with the building operator on the district side.

### Our RTU also cools a server room. How do we protect it?

We look at N+1 RTU capacity, a dedicated backup unit for the server room, BAS alarms for supply air temperature, and low-ambient controls for winter. The right mix depends on the load, and you get it in writing after a site assessment.

### Do you integrate RTUs with our building automation system?

Yes. We integrate RTU controllers with BACnet-based BAS platforms including Trane, Johnson Controls Metasys, Honeywell and Siemens Desigo, so alarms and schedules run from one front end.

### Do you install DOAS units for tenant IAQ requirements?

Yes. Dedicated outdoor air systems with energy recovery are quoted per site and can be paired with existing RTUs to raise ventilation without oversizing the cooling equipment.

### What does RTU maintenance cost for a multi-tenant office building?

Annual maintenance runs $295-$450 per unit per year, or $240-$340 per unit for 12 or more units on one site, with quarterly inspections and BAS alarm checks on Highway 7 and 404 corridor buildings.

### Do you service Trane Precedent and Voyager rooftop units?

Yes. We are an authorized Trane dealer and work on Precedent and Voyager units, including ReliaTel controls diagnostics.

### Can you schedule work around multi-tenant occupancy?

Yes. Shutdowns are scheduled for evenings or weekends with written tenant notice, and server-room tenants get a backup cooling plan before their RTU goes offline.

Nearby coverage

## Areas Near Markham

Scarborough

Scarborough's Golden Mile and 401 industrial stock carries older RTUs on legacy curbs. We phase replacements to keep tenants running, fabricate curb adapters in-house and coordinate crane days.

2-4 hr on-roof (GTA core)

[/service-areas/scarborough/ →](/service-areas/scarborough/)

North York

North York's Yonge corridor stacks offices, medical and dental clinics and condo towers. Clinics need steady, filtered air and after-hours installs; boards need Status Certificate documentation.

2-4 hr on-roof (GTA core)

[/service-areas/north-york/ →](/service-areas/north-york/)

Vaughan

Vaughan mixes new condo podiums at the Metropolitan Centre with Concord's light manufacturing. Podium RTUs need board-ready documentation; plants need make-up air sized to their exhaust.

2-4 hr on-roof (GTA core)

[/service-areas/vaughan/ →](/service-areas/vaughan/)

![Packaged rooftop units on a Toronto commercial roof at dusk](/images/misc/toronto-commercial-rooftop-at-dusk-with-a-row-of-p.webp)

24/7 dispatch | 2-4 hr on-roof GTA core

## Protect Your Markham Server Room Cooling

Site assessment, then a written quote within 24 hours. Response: 2-4 hr on-roof (GTA core).

Book a Site Assessment

[/contact/ →](/contact/)

 

Call (437) TBD

[tel:+14370000000 →](tel:+14370000000)

-   24-hour written quote
-   Save on Energy filed for you
-   Red Seal + TSSA + ESA + CRE
-   $5M liability + WSIB