# RTU Sizing Calculator Toronto | Rooftop Units Toronto Pros

> Free rooftop unit sizing calculator for Toronto commercial buildings. Estimate tons of cooling, then see published installed price ranges.

URL: https://rooftopunitstoronto.ca/tools/btu-calculator/

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

Free calculator

# 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.

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A Red Seal lead will be in touch. Your written quote follows within 24 hours.

Planning estimate only. Final sizing needs a Manual J/S load calculation that accounts for envelope, glazing, ventilation air and internal loads on your building.

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## Related Services

RTU Installation

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

 

Packaged RTUs

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

 

10-Ton RTU

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

More tools: 

see all free tools

[/tools/ →](/tools/)

![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

## Want the Number in Writing?

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

Book a Site Assessment

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