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C-N-O Comfort Zone Heating & CoolingHVAC contractor in Saint Peters, MO

C-N-O Comfort Zone Heating & Cooling is an HVAC contractor at 145 N Service Rd, St Peters, MO 63376, ranked #44 of 340 HVAC contractors in Saint Peters and rated 4.9 from 87 Google reviews. Open 7 days a week.

Saint Peters, MOUpdated 0 paid placements in any rankingHow we rank

Call (636) 209-5087Website ↗

Key facts

Key facts about C-N-O Comfort Zone Heating & Cooling
Address145 N Service Rd, St Peters, MO 63376, Saint Peters, MOGet directions
Phone(636) 209-5087
Websitecnocomfortzone.com
HoursMonday to Friday: 8 AM – 8 PM; Saturday and Sunday: 8 AM – 5 PM
Google rating4.9 from 87 Google reviews

Trades

Each trade shows the evidence we matched it on.

  • HVACmain tradeGoogle main category

Service area

Serves Saint Peters and 11 towns within 25 miles: O'Fallon, Dardenne Prairie, Weldon Spring, Lake Saint Louis, Saint Charles, Chesterfield, Wentzville, Bridgeton, Maryland Heights, Hazelwood and Saint Ann.

Based in Saint Peters, MOView on map

Opening hours

Opening hours for C-N-O Comfort Zone Heating & Cooling
DayHours
Monday8 AM – 8 PMevening
Tuesday8 AM – 8 PMevening
Wednesday8 AM – 8 PMevening
Thursday8 AM – 8 PMevening
Friday8 AM – 8 PMevening
Saturday8 AM – 5 PM
Sunday8 AM – 5 PM
  • Open evenings (after 6 PM)
  • Open Saturdays
  • Open Sundays

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

C-N-O Comfort Zone Heating & Cooling compared with nearby businesses
BusinessRankCR ScoreGoogle ratingLicense verifiedSaturdaySundayDistance away
C-N-O Comfort Zone Heating & Cooling (this business)—604.9 (87)—YesYes
Arch Air Services#42604.9 (303)—YesYes13.9 mi
Wyzer Heating and Cooling 🔥❄️👨‍🔧#43605.0 (25)—YesYes9.0 mi
Kirkwood Heating & Air Conditioning#45605.0 (21)—YesYes4.4 mi

See all 340 ranked HVAC contractors in Saint Peters

Reviews

ContractorsRanked reviews

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Google

4.9from 87 Google reviews

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Questions about C-N-O Comfort Zone Heating & Cooling

How is C-N-O Comfort Zone Heating & Cooling ranked in Saint Peters?

C-N-O Comfort Zone Heating & Cooling is ranked #44 of 340 HVAC contractors in Saint Peters by CR Score, with 60 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 C-N-O Comfort Zone Heating & Cooling’s hours?

C-N-O Comfort Zone Heating & Cooling is open 7 days a week. Its listed hours are Monday to Friday, 8 AM – 8 PM; Saturday and Sunday, 8 AM – 5 PM. On Saturdays it is open 8 AM to 5 PM, and on Sundays 8 AM to 5 PM. Hours come from the business listing; holiday hours may differ.

What areas does C-N-O Comfort Zone Heating & Cooling serve?

Serves Saint Peters and 11 towns within 25 miles: O'Fallon, Dardenne Prairie, Weldon Spring, Lake Saint Louis, Saint Charles, Chesterfield, Wentzville, Bridgeton, Maryland Heights, Hazelwood and Saint Ann. 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 C-N-O Comfort Zone Heating & Cooling?

C-N-O Comfort Zone Heating & Cooling has a rating of 4.9 from 87 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 C-N-O Comfort Zone Heating & Cooling?

Call C-N-O Comfort Zone Heating & Cooling on (636) 209-5087. The business is at 145 N Service Rd, St Peters, MO 63376, Saint Peters, MO. Its website is linked in the key facts on this page. Ask for a written estimate before any work starts.

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