Skip to main content
Compare HVAC Pro
Browse AreasHow It WorksFAQ
  • Browse Areas
  • How It Works
  • FAQ

Compare HVAC Pro

Local market research for homeowners. We help you evaluate licensed providers, understand pricing, and request quotes without pressure. Sponsored and featured listings are clearly labeled.

Popular Markets

  • HVAC near me
  • Washington state
  • Oregon state
  • Seattle, WA
  • Portland, OR
  • Spokane, WA
  • Tacoma, WA
  • Salem, OR

Research

  • How it works
  • Service categories
  • Financing
  • Cost calculator
  • State of HVAC 2026
  • FAQ

Guides

  • How to Read an HVAC Quote
  • Heat Pump vs Furnace
  • The 2025 Federal HVAC Tax Credits
  • HVAC Financing 101
  • Seasonal HVAC Maintenance Checklist
  • HVAC Not Cooling? 7 Things to Check Before Calling
  • Sizing an HVAC System Correctly
  • How to Spot HVAC Scams
AboutEditorial PolicyContributorsMethodologyContactCorrectionsPrivacy PolicyTerms of ServiceSMS TermsCookie PolicyAffiliate DisclosureDo Not Sell My Info
© 2026 Compare HVAC Pro. All rights reserved.comparehvacpro.com

We use cookies for analytics to understand how the site is used. No ads. No data sold. Details.

  1. Home
  2. Alton, IL
  3. Den-Son Inc. Cooling & Heating

Den-Son Inc. Cooling & Heating

Den-Son Inc. Cooling & Heating is a HVAC provider serving Alton, IL. Rated 4.8★ with 164 Google reviews. See services, review signals, and request a quote.

4.8★ (164 reviews)HVACAlton, IL
On this page▾
  1. 1.Company overview
  2. 2.Photos
  3. 3.What customers say
  4. 4.Key highlights
  5. 5.Explore nearby research
  6. 6.Frequently asked questions

Company overview

  • TradeHVAC
  • Service areaAlton, IL
  • Google rating4.8★ (164 reviews)
  • Phone(618) 372-8375
  • Address104 E Center St, Brighton, IL 62012, USA

Photos

  • Den-Son Inc. Cooling & Heating photo 1
  • Den-Son Inc. Cooling & Heating photo 2
  • Den-Son Inc. Cooling & Heating photo 3
  • Den-Son Inc. Cooling & Heating photo 4
  • Den-Son Inc. Cooling & Heating photo 5

Photos from Den-Son Inc. Cooling & Heating, Ron Perich, sas sas

What customers say

★★★★★

“Unfortunately, I woke up with my furnace not working. After calling around to multiple HVAC companies, I was left in the dark waiting for call backs. When I called Den-Son, they immediately gave me an…”

— Destiny Sharrow, 4 months ago
★★★★★

“Update: It's been about 10 months with our new unit and we've just gone through the first winter and summer. A couple of thoughts on my particular set up. First, I probably could have gone with the A…”

— Ron Perich, 7 months ago
★★★★★

“DenSon was great to work with me. They promptly returned phone calls and sending servicemen out to install a new heater and AC unit. They also helped me get insurance to pay for the repair. They are t…”

— Regina Birch, 2 months ago
★☆☆☆☆

“In March of 2025 We pre-paid Den-son for a yearly service (as we have previously done) but this year we DID NOT RECEIVE our prepaid service. We had to call another HVAC company to take care of ou…”

— Dan Amy Heitzig, 6 months ago

Key highlights

Strengths

  • Highly rated (4.8★ average)
  • Large review volume (164 reviews)

Things to ask

  • Confirm availability for your area and timeline
  • Ask about warranty terms on parts and labor
  • Request a written estimate before work begins
  • Ask about payment plans or financing

Explore nearby research

  • Alton, IL HVAC pros
  • Best HVAC in Alton
  • HVAC cost in Alton
  • Best HVAC in Chicago, IL
  • Best HVAC in Aurora, IL
  • Best HVAC in Rockford, IL
  • Best HVAC in Joliet, IL

Frequently Asked Questions

  • What services does Den-Son Inc. Cooling & Heating offer?

    Den-Son Inc. Cooling & Heating provides: HVAC diagnosis, repairs, and full system installs. They serve residential and commercial customers in Alton, IL.

  • What is Den-Son Inc. Cooling & Heating's rating?

    Den-Son Inc. Cooling & Heating has a 4.8 out of 5 star rating based on 164 Google reviews.

  • Is this company licensed in Illinois?

    All listed providers have a verified Illinois contractor license at time of publication. You can verify on the Illinois Department of Financial and Professional Regulation (state business registration) plus municipal HVAC licensing (e.g. City of Chicago Department of Buildings) lookup at https://online-dfpr.micropact.com/Lookup/LicenseLookup.aspx.

  • Does Den-Son Inc. Cooling & Heating offer emergency service?

    Contact them directly to ask about emergency availability and after-hours service.

  • How do I request a quote?

    Use the CTA below to submit your ZIP. You can message this company alongside two or three other local pros for easy comparison.

✓ Licensing verified 2026-04-22. Reviews refreshed 2026-04-22.

Licensing data: Illinois Department of Financial and Professional Regulation (state business registration) plus municipal HVAC licensing (e.g. City of Chicago Department of Buildings) · Company data: verified business records + Google Business profile

See our editorial standards · Report inaccurate info about Den-Son Inc. Cooling & Heating

Request a quote from Den-Son Inc. Cooling & Heating

Enter your ZIP and we will line up a free estimate alongside other top local pros.

Compare HVAC Pros

Own or manage this business? Claim this listing to earn a verified-owner badge.