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A Treffeisen & Son LLCHVAC contractor in Oneonta, NY

A Treffeisen & Son LLC is an HVAC contractor at 204 Roundhouse Rd, Oneonta, NY 13820, ranked #7 of 17 HVAC contractors in Oneonta and rated 3.6 from 8 Google reviews. Open Monday to Friday.

Oneonta, NYUpdated 0 paid placements in any rankingHow we rank

Call (607) 432-1655Website ↗

Key facts

Key facts about A Treffeisen & Son LLC
Address204 Roundhouse Rd, Oneonta, NY 13820Get directions
Phone(607) 432-1655
Websiteatreffeisenandson.com
HoursMonday to Friday: 7 AM – 3:30 PM
Google rating3.6 from 8 Google reviews

Trades

Each trade shows the evidence we matched it on.

  • HVACmain tradeGoogle main category

Service area

Serves Oneonta and 1 town within 25 miles: Norwich.

Based in Oneonta, NYView on map

Opening hours

Opening hours for A Treffeisen & Son LLC
DayHours
Monday7 AM – 3:30 PM
Tuesday7 AM – 3:30 PM
Wednesday7 AM – 3:30 PM
Thursday7 AM – 3:30 PM
Friday7 AM – 3:30 PM
SaturdayClosed
SundayClosed
  • Open evenings — no
  • Open Saturdays — no
  • Open Sundays — no

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

A Treffeisen & Son LLC compared with nearby businesses
BusinessRankCR ScoreGoogle ratingLicense verifiedSaturdaySundayDistance away
A Treffeisen & Son LLC (this business)—523.6 (8)—NoNo
PlumbEtrics | Electrician#5533.9 (14)—YesYes5.5 mi
Osterhoudt Commercial Refrigeration#6523.1 (12)—NoNo4.6 mi
Ram Air Heating & Cooling#8523.8 (10)—YesYes24.6 mi

See all 17 ranked HVAC contractors in Oneonta

Reviews

ContractorsRanked reviews

No ContractorsRanked reviews yet

Google

3.6from 8 Google reviews

Hired A Treffeisen & Son LLC? Write a review

Questions about A Treffeisen & Son LLC

How is A Treffeisen & Son LLC ranked in Oneonta?

A Treffeisen & Son LLC is ranked #7 of 17 HVAC contractors in Oneonta by CR Score, with 52 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 A Treffeisen & Son LLC’s hours?

A Treffeisen & Son LLC is open Monday to Friday. Its listed hours are Monday to Friday, 7 AM – 3:30 PM. It is closed on Saturdays and closed on Sundays. Hours come from the business listing; holiday hours may differ.

What areas does A Treffeisen & Son LLC serve?

Serves Oneonta and 1 town within 25 miles: Norwich. 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 A Treffeisen & Son LLC?

A Treffeisen & Son LLC has a rating of 3.6 from 8 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 A Treffeisen & Son LLC?

Call A Treffeisen & Son LLC on (607) 432-1655. The business is at 204 Roundhouse Rd, Oneonta, NY 13820. Its website is linked in the key facts on this page. Ask for a written estimate before any work starts.

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