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Swiss, LLCHVAC contractor in O'Fallon, MO

Swiss, LLC is an HVAC contractor at 406 E Wabash St, O'Fallon, MO 63366, ranked #5 of 293 HVAC contractors in O'Fallon and rated 4.9 from 924 Google reviews. Open 24 hours a day, 7 days a week.

O'Fallon, MOUpdated 0 paid placements in any rankingHow we rank

Call (636) 542-8739Website ↗

Key facts

Key facts about Swiss, LLC
Address406 E Wabash St, O'Fallon, MO 63366Get directions
Phone(636) 542-8739
Websiteswissairstl.com
HoursOpen 24 hours, 7 days a week
Google rating4.9 from 924 Google reviews

Trades

Each trade shows the evidence we matched it on.

  • HVACmain tradeGoogle main category

Service area

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

Based in O'Fallon, MOView on map

Opening hours

Opening hours for Swiss, LLC
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

Swiss, LLC compared with nearby businesses
BusinessRankCR ScoreGoogle ratingLicense verifiedSaturdaySundayDistance away
Swiss, LLC (this business)—934.9 (924)—YesYes
Hoock's Heating & Cooling#3935.0 (768)—YesYes14.1 mi
Hosack Plumbing, Heating & Cooling#4935.0 (696)—YesYes0.4 mi
Faszold Heating and Cooling#6934.9 (873)—YesYes1.3 mi

See all 293 ranked HVAC contractors in O'Fallon

Questions about Swiss, LLC

How is Swiss, LLC ranked in O'Fallon?

Swiss, LLC is ranked #5 of 293 HVAC contractors in O'Fallon by CR Score, with 93 out of 100 as of October 2026. The score weighs reputation, credentials, review volume, recency, availability, trade focus, proximity and profile completeness. No business can pay to change its rank.

What are Swiss, LLC’s hours?

Swiss, LLC 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 Swiss, LLC serve?

Serves O'Fallon and 11 towns within 25 miles: Dardenne Prairie, Saint Peters, Lake Saint Louis, Weldon Spring, Wentzville, Saint Charles, Chesterfield, Bridgeton, Maryland Heights, Wildwood and Ellisville. 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 Swiss, LLC?

Swiss, LLC has a rating of 4.9 from 924 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 Swiss, LLC?

Call Swiss, LLC on (636) 542-8739. The business is at 406 E Wabash St, O'Fallon, MO 63366. Its website is linked in the key facts on this page. Ask for a written estimate before any work starts.

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