HVAC Professional

Delta Air Systems Ltd.

Waterloo, ON

Emergency ServiceWSIBBBB AccreditedResponds to Reviews

+1 226-640-5110 Website

2 Credentials Verified

80out of 100

Trusted

ProScore

This score reflects 633 Google reviews, ratings from 2 platforms in all, WSIB coverage confirmed.

How is this calculated?

Score updated: Oct 2026

About Delta Air Systems Ltd.

AI-generated summary from ProScore data sources

Delta Air Systems Ltd. provides HVAC repairs and installations in Waterloo, operating 24/7. Installation work is carried out with attention to cleanliness and efficiency, and staff take time to explain the work and handle associated paperwork.

Delta Air Systems Ltd.: ProScore 80, 1st of 12 scored HVAC contractors in Waterloo.
633 Google reviews (4.9 stars; median 71) for Delta Air Systems Ltd., ahead of 12 of 12 HVAC contractors.

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What Customers Say

AI analysis of 10 Google reviews

Top Strengths

Installation teams consistently described as clean, efficient, and thorough - 'left everything spotless', 'laying down liners and tarps to protect flooring'

Staff take time to educate customers and answer questions - 'took the time to answer all of our questions', 'teaches me things as he works', 'No question is too simple'

Comprehensive service approach including handling paperwork - 'took care of submitting our rebate and warranty information'

professionalknowledgeableefficientclean installationfriendly service

Ratings Across Platforms

Aggregated from independent sources. Only ProScore shows all.

3 sources · 942 reviews

GoogleListing found

Google Business Profile reviews

4.9/5

633 reviews

Review platform BListing found

Independent review platform · name withheld by policy

5.0/5

309 reviews

BBBListing found

Better Business Bureau · accredited · as of March 2026

A+Rating · accredited

Not found on Review platform C.

ProScore aggregates Google, the BBB and other major review platforms. Some sources are not named publicly.

How sources are weighted: ProScore methodology.

Things to Know

Trusted Level

Scores in ProScore’s Trusted tier — strong, consistent signals across the sources ProScore checks.

Highly Rated

Consistently rated 4.9 stars across 633 Google reviews.

Rated on Multiple Platforms

Independently rated on 2 review platforms — ratings that agree across sources are harder to game.

WSIB Verified

Workplace Safety and Insurance Board coverage confirmed — you're protected.

BBB Accredited · A+

Better Business Bureau accredited with an A+ rating.

Open 24 Hours

Every posted day shows 24-hour availability.

Google Review Breakdown

633 total

594

Featured Review

From Google

“

We had a Lennox furnace replaced with another Lennox furnace on Jan 28/26. From my initial contact with Delta Air Systems Service Tech Liam to Sales Consultant Matt to Install Coordinator Tammy to Install Team Scott and Fabio, all went smooth from start to finish! Everyone was on point, prompt and efficient! Scott and Fabio arrived when Tammy said they would. They were clean and efficient from the start, laying down liners and tarps to protect our flooring and keeping debris to a minimum. They w

Tom Shangas

Google Review

Photos & Work

1 photo

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Local Heating And Cooling

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Frequently Asked Questions

Is Delta Air Systems Ltd. licensed?

Licensing status has not been verified for Delta Air Systems Ltd.. Contact them directly to confirm current credentials before hiring.

Does Delta Air Systems Ltd. have insurance?

Yes, Delta Air Systems Ltd. has verified WSIB (Workplace Safety and Insurance Board) coverage, which protects homeowners from liability if a worker is injured on the job.

What is Delta Air Systems Ltd.’s rating?

Delta Air Systems Ltd. has a ProScore Trust Score of 80/100 (Trusted), calculated from 3 data sources including 633 Google reviews.

Where is Delta Air Systems Ltd. located?

Delta Air Systems Ltd. is a hvac serving Waterloo, Ontario. You can reach them at +1 226-640-5110. View their full profile on ProScore for reviews and credentials.

Business Details

595 Colby Dr #2, Waterloo, ON N2V 1A1

HVAC

View on Google Maps

Hours

Every dayOpen 24 hours

Services Offered

AC installationFurnace repairDuctworkHVAC maintenanceHeat pump installationThermostat installation

Services & Info

Open 24 HoursEmergency ServiceOnsite servicesOnline estimates

Crowd

LGBTQ+ friendlyTransgender safe space

Other

LGBTQ+ friendlyIdentifies as women-owned

Parking

On-site parkingFree parking lotFree parking garageFree street parking

Offerings

Repair servicesInstallation service

Accessibility

Wheelchair accessible seating

Service options

From the business

Identifies as women-owned

Credentials

Insurance

Not Confirmed

Credentials are as reported by contractors and public sources — verify each with the contractor and the issuing authority before hiring.Check it yourself: WSIB clearance · TSSA fuels contractor registry

Homeowner Guides

How much does this service cost in Ontario?Red flags when hiring HVAC FAQs in Waterloo View all guides →

Data Transparency

Sources: Google, BBB, major review platforms, and Ontario regulatory records
Score computed: October 13, 2026

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Checked by ProScore

What is the ProScore?

One score from 0 to 100 across every review platform and public registry ProScore checks. How the ProScore works

≥81

Elite

≥70

Trusted

≥54

Good

≥30

Basic

<30

Caution

—

Not yet rated

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Compare HVAC Contractors in Waterloo

See how Delta Air Systems Ltd. ranks against other hvac contractors in Waterloo on ProScore.

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A ProScore is informational only — not a guarantee, endorsement, or recommendation — and the data behind it may be incomplete or out of date. Before hiring, independently verify all credentials, including licences, insurance (including WSIB) and references, directly with the contractor and the issuing authority. Full data notice. Something wrong? Let us know.