# 20 Ton Rooftop Unit Toronto | Rooftop Units Toronto Pros

> 20 ton rooftop unit Toronto: 15-20 ton installed $32K-$58K in 7-10 days, crane + structural review. Industrial + large commercial. 24-hour written quote.

URL: https://rooftopunitstoronto.ca/20-ton-rooftop-unit-toronto/

![20-ton packaged rooftop unit lifted by crane over a Scarborough warehouse](/images/misc/large-20-ton-packaged-rooftop-unit-suspended-from-.webp)

Industrial + Large Commercial

# 20-Ton Rooftop Units for Industrial and Large Commercial Roofs

Last updated: October 24, 2026

15-20 ton RTUs with structural review and crane day for industrial and large commercial roofs.

-   Warehouse zones will not cool
-   Dual-circuit failure
-   Heavier unit needs structural review
-   Old large RTU at end of life
-   High demand charges

Book a Site Assessment

[/contact/ →](/contact/)

 

View Pricing

[#pricing →](#pricing)

24-Hour Written Quote

From $32,000 installed, 15-20 ton

-   Parts, labour, crane, permit + HST on one line
-   2-4 hr on-roof emergency response, GTA core
-   Save on Energy rebate filed on qualifying work

Red Seal HVAC-RTSSA G1 + G2ESA + CRE$5M + WSIB

24/7 Dispatch (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

Symptoms first

## Is Your Equipment Showing These Signs?

Warehouse zones that will not cool, dual-circuit failures or a roof that needs structural review before a heavier unit: 15-20 ton installed $32K-$58K in 7-10 days.

-   Warehouse zones will not cool
-   Dual-circuit failure
-   Heavier unit needs structural review
-   Old large RTU at end of life
-   High demand charges

Seeing one of these? 

Book a site assessment

[/contact/ →](/contact/)

 or call dispatch for a 2-4 hour on-roof visit in the GTA core.

## Big Spaces, Big Units, Bigger Planning

A **20-ton RTU** delivers about **240,000 BTU** per hour of cooling. Units in the 15-25 ton range serve warehouse zones, big-box retail, distribution centres and large open floors across Scarborough, Mississauga and Brampton. The calls we get usually start with a zone that will not cool, a **dual refrigeration circuit** unit running on one circuit, or an old large unit that has reached the end.

At this size, the mechanical work is only part of the job. Weight, crane reach, structure and electrical capacity all have to be planned before anything is ordered.

## What Makes Large RTU Installs Different

### Structural engineer review

A 20-ton unit can weigh several thousand pounds. When it is heavier than the unit it replaces, or goes in a new spot, a **structural engineer review** comes first, with reinforcement designed and installed before the lift.

### Crane rigging

**Crane rigging** for large units needs the right crane class, spreader bars and a lift plan. Industrial sites usually lift from the yard; sites on City of Toronto roads need ROW permits, which we file.

### Dual circuits and controls

Large units typically carry two refrigeration circuits for redundancy and staging. **DDC controls** tie the unit into your BAS for schedules, alarms and demand control.

## How Much Does a 20-Ton RTU Cost?

| Size | Installed | Timeline |
| --- | --- | --- |
| 15-20 ton | $32K-$58K | 7-10 days |
| 25 ton + large | $55K-$95K | 2-3 wks |

Rebates are per ton, so large high-efficiency units can capture meaningful 

Save on Energy

[/save-on-energy-retrofit-toronto/ →](/save-on-energy-retrofit-toronto/)

 incentives. Adding a supply fan VFD can cut fan energy further; see 

VFD upgrades

[/vfd-upgrade-commercial-hvac-toronto/ →](/vfd-upgrade-commercial-hvac-toronto/)

.

## Quick Answers

**Can one 20-ton unit replace two 10-ton units?** Sometimes, but redundancy matters. Two units mean one failure does not take the whole space down. We weigh both options.

**What about the electrical service?** Large units may need a bigger disconnect or service upgrade, which our ESA-licensed crew handles and lists on the quote.

Our Scarborough 20-ton job went in after a structural check, with permits, lift and startup on the dates promised. See 

Scarborough

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

 for more on phased industrial retrofits, and 

10-ton rooftop units

[/10-ton-rooftop-unit-toronto/ →](/10-ton-rooftop-unit-toronto/)

 for mid-size floors, or compare every size of 

commercial rooftop unit in Toronto

[/ →](/)

 we supply.

Published pricing

## How Much Does 20-Ton RTU Cost in Toronto?

Ranges from recent GTA jobs. Your written quote lands within 24 hours with parts, labour, crane, permit and HST on one line, and rebate-net pricing where the work qualifies.

25/50/25 payment on installs: 25% at order, 50% on install day, 25% on commissioning sign-off. Net-30 for commercial and PM accounts. 

See all pricing

[/pricing/ →](/pricing/)

.

### 20-Ton RTU pricing

CAD + HST

| Service | Price | Timeline |
| --- | --- | --- |
| 15-20 ton | $32K-$58K | 7-10 days |
| 25 ton + large | $55K-$95K | 2-3 wks |
| VFD upgrade per unit | $8K-$40K | 2-5 days |

Free tools

## Try Our Free Commercial RTU Sizing Calculator

Two minutes, no email required. Results show on screen first.

### Commercial RTU Sizing Calculator

Estimate the cooling tonnage a commercial space needs, then see which rooftop unit size and installed price range to ask about.

Use the calculator

[Commercial RTU Sizing Calculator →](/tools/btu-calculator/)

Case study | Highway 401 industrial, Scarborough | Highway 401 corridor

## Scarborough 20-ton RTU with crane lift

A Scarborough warehouse needed a 20-ton unit on a roof that had not been checked for the added weight. We arranged a structural review, planned the crane lift and permits, and set the unit on the promised date. Startup and commissioning followed the same day, with readings documented for the owner.

Equipment

20-ton packaged RTU, dual circuit

Size

20 tons

Turnaround

7-10 days

Price

Within $32K-$58K range

Why property teams pick us

## Why Choose Rooftop Units Toronto Pros for 20-Ton RTU?

### Structural review first

Heavier units get a structural engineer review and reinforcement plan before the lift.

### Crane days that hold

Permits, lift and startup on the promised dates, as on our Scarborough 20-ton job.

### Dual-circuit redundancy

Two refrigeration circuits so one failure does not take the whole zone down.

### DDC-ready controls

Units tied into your BAS for scheduling, alarms and demand control.

Field photos

## Our 20-Ton RTU Work

Recent GTA rooftops and mechanical rooms. Click any photo to enlarge.

### Before + After

![Aging large RTU with a failed circuit](/images/cards/aging-large-rooftop-unit-with-one-failed-refrigera.webp)

Before

![New 20-ton dual-circuit RTU on the same roof](/images/cards/new-20-ton-dual-circuit-packaged-rooftop-unit-runn.webp)

After

Scarborough 20-ton RTU with crane lift, after a structural check.

Client Records

## What Clients Say About Our 20-Ton RTU

> "A 20-ton unit on our Scarborough warehouse needed a crane and a structural check. Permits, lift and startup were done on the dates promised."

RPRaj P.Facility manager, Scarborough

> "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

> "We have eleven old units across two Scarborough buildings. They ranked every one by condition and gave us a three-season replacement plan with rebate-net prices."

LPLinda P.Asset manager, Golden Mile

> "Clear plan for the crane day and the structural work. Nothing on lift day was a surprise."

HYHassan Y.Plant manager, Mississauga

> "When the compressor could not be replaced the same day they brought portable cooling for our server room. The new compressor went in the next morning."

ABAlex B.Facility manager, Etobicoke

## RTU offline or chiller alarm?

Red Seal tech on the roof in 2-4 hrs across the GTA core. Call (437) TBD.

(437) TBD

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

 

Emergency Service

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

Buyer questions

## 20-Ton RTU FAQs

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 much does a 20-ton rooftop unit cost installed in Toronto?

15-20 ton units run $32K-$58K installed in 7-10 days, including crane and commissioning on standard roofs. Structural reinforcement, ROW permits and electrical upgrades are listed separately when needed. 25-ton and larger units run $55K-$95K.

### How much cooling does a 20-ton unit provide?

About 240,000 BTU per hour. It suits warehouse zones, big-box retail and large open floors once the load is confirmed.

### Does my roof need a structural review?

Often, yes, for 15-25 ton units, especially when a new unit is heavier than the old one or goes in a new location. We arrange a structural engineer review and any reinforcement before the lift.

### What are dual refrigeration circuits?

Large units often have two independent refrigeration circuits. If one compressor or circuit fails, the other keeps running at partial capacity, which protects the space until the repair.

### How long does a 20-ton install take?

7-10 business days from signed quote to startup in most cases, depending on equipment lead time, structural work and permits. The crane day itself is usually one day.

### Can large units qualify for Save on Energy?

Yes. Rebates are per ton, so large high-efficiency units can capture meaningful incentives. Our 14-RTU Airport Rd program captured $87K.

### Can the unit tie into our building automation system?

Yes. 20-ton units are DDC-ready and integrate with BACnet systems for scheduling, alarms and demand control.

### Do you add VFDs to large RTUs?

Where supply fans run constant speed, a VFD retrofit at $8K-$40K per unit can cut fan energy and often qualifies for incentives.

Keep the whole roof covered

## Related Services

 

![10-ton packaged rooftop unit lifted by crane over a GTA office building](/images/misc/10-ton-packaged-rooftop-unit-being-lifted-by-crane.webp) From $18,000

[/10-ton-rooftop-unit-toronto/ →](/10-ton-rooftop-unit-toronto/)

### 

10-Ton Rooftop Units

[/10-ton-rooftop-unit-toronto/ →](/10-ton-rooftop-unit-toronto/)

10-ton packaged RTUs for larger retail and office floors, with crane and curb planning.

Details + pricing

[/10-ton-rooftop-unit-toronto/ →](/10-ton-rooftop-unit-toronto/)

 

![Old rooftop unit lifted off a Toronto retail roof by crane during a replacement](/images/misc/old-rusted-rooftop-unit-being-lifted-off-a-toronto.webp) From $9,500

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

### 

Commercial Rooftop Unit Replacement

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

End-of-life RTU swaps with curb adapters, crane permits and rebate-net pricing.

Details + pricing

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

 

![Variable frequency drive panels beside supply fans in a Toronto mechanical room](/images/misc/variable-frequency-drive-panels-mounted-beside-lar.webp) From $8,000

[/vfd-upgrade-commercial-hvac-toronto/ →](/vfd-upgrade-commercial-hvac-toronto/)

### 

VFD Upgrades for Commercial HVAC

[/vfd-upgrade-commercial-hvac-toronto/ →](/vfd-upgrade-commercial-hvac-toronto/)

Variable frequency drive retrofits on supply fans, pumps, towers and chillers.

Details + pricing

[/vfd-upgrade-commercial-hvac-toronto/ →](/vfd-upgrade-commercial-hvac-toronto/)

## Don't See Your GTA City?

Coverage from Toronto to Pearson, Mississauga to Markham. Call 

(437) TBD

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

 for a 24-hour written quote.

All Service Areas

[/service-areas/ →](/service-areas/)

 

Get a Written Quote

[/contact/ →](/contact/)

![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

## Ready to Book 20-Ton RTU?

Site assessment, then a written quote within 24 hours. Parts, labour, crane, permit and HST on one line.

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