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Welzig Heating, Air, Plumbing & ElectricHVAC contractor in Longmont, CO

Welzig Heating, Air, Plumbing & Electric is an HVAC contractor at 1831 Boston Ave, Longmont, CO 80501, ranked #2 of 480 HVAC contractors in Longmont and rated 4.9 from 1,269 Google reviews. Open 24 hours a day, 7 days a week.

Longmont, COUpdated 0 paid placements in any rankingHow we rank

Call (303) 678-5576Website ↗

Key facts

Key facts about Welzig Heating, Air, Plumbing & Electric
Address1831 Boston Ave, Longmont, CO 80501Get directions
Phone(303) 678-5576
Websitewelzig-heating-and-air.com
HoursOpen 24 hours, 7 days a week
Google rating4.9 from 1,269 Google reviews

Trades

Each trade shows the evidence we matched it on.

Service area

Serves Longmont and 11 towns within 25 miles: Gunbarrel, Erie, Firestone, Berthoud, Frederick, Lafayette, Louisville, Boulder, Superior, Broomfield and Johnstown.

Based in Longmont, COView on map

Opening hours

Opening hours for Welzig Heating, Air, Plumbing & Electric
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

Welzig Heating, Air, Plumbing & Electric compared with nearby businesses
BusinessRankCR ScoreGoogle ratingLicense verifiedSaturdaySundayDistance away
Welzig Heating, Air, Plumbing & Electric (this business)—664.9 (1,269)—YesYes
M and M Heating, Cooling, Plumbing and Electrical#1674.9 (3,075)—YesYes0.6 mi
Blue Valley Heating & Cooling#3654.8 (1,093)—YesYes5.4 mi
TNT Home Services - Longmont#4654.8 (865)—YesYes1.2 mi

See all 480 ranked HVAC contractors in Longmont

Reviews

ContractorsRanked reviews

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Google

4.9from 1,269 Google reviews

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Questions about Welzig Heating, Air, Plumbing & Electric

How is Welzig Heating, Air, Plumbing & Electric ranked in Longmont?

Welzig Heating, Air, Plumbing & Electric is ranked #2 of 480 HVAC contractors in Longmont by CR Score, with 66 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 Welzig Heating, Air, Plumbing & Electric’s hours?

Welzig Heating, Air, Plumbing & Electric 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 Welzig Heating, Air, Plumbing & Electric serve?

Serves Longmont and 11 towns within 25 miles: Gunbarrel, Erie, Firestone, Berthoud, Frederick, Lafayette, Louisville, Boulder, Superior, Broomfield and Johnstown. 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 Welzig Heating, Air, Plumbing & Electric?

Welzig Heating, Air, Plumbing & Electric has a rating of 4.9 from 1,269 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 Welzig Heating, Air, Plumbing & Electric?

Call Welzig Heating, Air, Plumbing & Electric on (303) 678-5576. The business is at 1831 Boston Ave, Longmont, CO 80501. 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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