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Dennis Heating and CoolingHVAC contractor in DeKalb, IL

Dennis Heating and Cooling is an HVAC contractor in DeKalb, IL, ranked #15 of 196 HVAC contractors in DeKalb and rated 5.0 from 20 Google reviews. Open 24 hours a day, 7 days a week.

DeKalb, ILUpdated 0 paid placements in any rankingHow we rank

Call (815) 375-8859Website ↗

Key facts

Key facts about Dennis Heating and Cooling
Phone(815) 375-8859
Websitedennisheatingcooling.com
HoursOpen 24 hours, 7 days a week
Google rating5.0 from 20 Google reviews

Trades

Each trade shows the evidence we matched it on.

  • HVACmain tradeGoogle main category

Service area

Serves DeKalb and 11 towns within 25 miles: Sycamore, Genoa, Hampshire, Elburn, Rochelle, Pingree Grove, Wasco, Belvidere, Village of Campton Hills, Marengo and Huntley.

Based in DeKalb, ILView on map

Opening hours

Opening hours for Dennis Heating and Cooling
DayHours
MondayOpen 24 hours
TuesdayOpen 24 hours
WednesdayOpen 24 hours
ThursdayOpen 24 hours
FridayOpen 24 hours
SaturdayOpen 24 hours
SundayOpen 24 hours
  • Open 24/7
  • Open evenings — no
  • Open Saturdays
  • Open Sundays
  • Emergency service

Typical heating and cooling prices

Typical heating and cooling prices
JobLowTypicalHigh
AC replacementPer system, installed (unit plus labor); typical range of customer-reported jobs. US national range$3,887$5,978$8,073
Furnace replacementPer system, installed; typical range of customer-reported jobs. US national range$2,823$4,814$6,896

Market ranges for the trade, checked October 2026, not a quote from this business. Ask for a written estimate.

Compare nearby HVAC contractors

Dennis Heating and Cooling compared with nearby businesses
BusinessRankCR ScoreGoogle ratingLicense verifiedSaturdaySundayDistance away
Dennis Heating and Cooling (this business)—615.0 (20)—YesYes
Leith Heating and Cooling Inc.#14615.0 (784)—YesYes21.5 mi
Comfort Masters Service Experts#16604.8 (1,224)—YesYes24.9 mi

See all 196 ranked HVAC contractors in DeKalb

Reviews

ContractorsRanked reviews

No ContractorsRanked reviews yet

Google

5.0from 20 Google reviews

Hired Dennis Heating and Cooling? Write a review

Questions about Dennis Heating and Cooling

How is Dennis Heating and Cooling ranked in DeKalb?

Dennis Heating and Cooling is ranked #15 of 196 HVAC contractors in DeKalb by CR Score, with 61 out of 100 as of October 2026. The score weighs reputation, credentials, review volume, recency, availability, trade focus, proximity, claimed profile, partnered and ContractorsRanked reviews. No business can pay to change its rank.

What are Dennis Heating and Cooling’s hours?

Dennis Heating and Cooling is open 24 hours a day, 7 days a week. Its listed hours are Open 24 hours, 7 days a week. On Saturdays it is open Open 24 hours, and on Sundays Open 24 hours. Hours come from the business listing; holiday hours may differ.

What areas does Dennis Heating and Cooling serve?

Serves DeKalb and 11 towns within 25 miles: Sycamore, Genoa, Hampshire, Elburn, Rochelle, Pingree Grove, Wasco, Belvidere, Village of Campton Hills, Marengo and Huntley. The list is based on the business's location and the usual service radius for heating and cooling. Confirm your address is covered when you call.

What do Google reviews say about Dennis Heating and Cooling?

Dennis Heating and Cooling has a rating of 5.0 from 20 Google reviews. The CR Score adjusts the star rating for review count, so a high rating from a few reviews counts for less than the same rating from many.

How do I contact Dennis Heating and Cooling?

Call Dennis Heating and Cooling on (815) 375-8859. Its website is linked in the key facts on this page. Ask for a written estimate before any work starts.

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Claiming is free. Correct your hours, trades and service area. The CR Score is recalculated from corrected data; payment never changes it.

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