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My Guy Heating and Air (Firestone)HVAC contractor in Longmont, CO

My Guy Heating and Air (Firestone) is an HVAC contractor at 4321 Mulligan St, Longmont, CO 80504, ranked #19 of 480 HVAC contractors in Longmont and rated 5.0 from 914 Google reviews. Open Monday to Friday.

Longmont, COUpdated 0 paid placements in any rankingHow we rank

Call (303) 502-2870Website ↗

Key facts

Key facts about My Guy Heating and Air (Firestone)
Address4321 Mulligan St, Longmont, CO 80504Get directions
Phone(303) 502-2870
Websitemyguyheatingandair.com
HoursMonday to Friday: 8 AM – 8 PM
Google rating5.0 from 914 Google reviews

Trades

Each trade shows the evidence we matched it on.

  • HVACmain tradeGoogle main category

Service area

Serves Longmont and 11 towns within 25 miles: Firestone, Frederick, Berthoud, Johnstown, Milliken, Erie, Fort Lupton, Loveland, Gunbarrel, Lafayette and Brighton.

Based in Longmont, COView on map

Opening hours

Opening hours for My Guy Heating and Air (Firestone)
DayHours
Monday8 AM – 8 PMevening
Tuesday8 AM – 8 PMevening
Wednesday8 AM – 8 PMevening
Thursday8 AM – 8 PMevening
Friday8 AM – 8 PMevening
SaturdayClosed
SundayClosed
  • Open evenings (after 6 PM)
  • 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

My Guy Heating and Air (Firestone) compared with nearby businesses
BusinessRankCR ScoreGoogle ratingLicense verifiedSaturdaySundayDistance away
My Guy Heating and Air (Firestone) (this business)—615.0 (914)—NoNo
One Hour Heating & Air Conditioning® of Loveland#17624.8 (2,777)—YesYes17.3 mi
Jim Needham Heating Cooling Plumbing and Drain#18614.9 (61)—YesYes7.5 mi
ComfortFlow HVAC Repair#20614.9 (58)—YesYes8.5 mi

See all 480 ranked HVAC contractors in Longmont

Reviews

ContractorsRanked reviews

No ContractorsRanked reviews yet

Google

5.0from 914 Google reviews

Hired My Guy Heating and Air (Firestone)? Write a review

Questions about My Guy Heating and Air (Firestone)

How is My Guy Heating and Air (Firestone) ranked in Longmont?

My Guy Heating and Air (Firestone) is ranked #19 of 480 HVAC contractors in Longmont 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 My Guy Heating and Air (Firestone)’s hours?

My Guy Heating and Air (Firestone) is open Monday to Friday. Its listed hours are Monday to Friday, 8 AM – 8 PM. It is closed on Saturdays and closed on Sundays. Hours come from the business listing; holiday hours may differ.

What areas does My Guy Heating and Air (Firestone) serve?

Serves Longmont and 11 towns within 25 miles: Firestone, Frederick, Berthoud, Johnstown, Milliken, Erie, Fort Lupton, Loveland, Gunbarrel, Lafayette and Brighton. 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 My Guy Heating and Air (Firestone)?

My Guy Heating and Air (Firestone) has a rating of 5.0 from 914 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 My Guy Heating and Air (Firestone)?

Call My Guy Heating and Air (Firestone) on (303) 502-2870. The business is at 4321 Mulligan St, Longmont, CO 80504. 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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