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📞 404-480-4941

404-480-4941

HVAC Contractor in Alpharetta, GA

Licensed HVAC service in Alpharetta, GA. 24/7 emergency repair, installation, and maintenance.

Upfront pricing, 2 year satisfaction guarantee. Call (404) 689-4168.

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AC Repair

Comfort Club Maintenance

One Hour HVAC technician standing in front of service van North Atlanta

One Hour Heating & Air Conditioning of North Atlanta handles 24/7 HVAC repair, installation, and maintenance for Alpharetta homeowners from our office at 1360 Union Hill Rd, about 15 minutes from Downtown Alpharetta. Every job carries our "Always On Time...Or You Don't Pay A Dime!®" guarantee plus a 100% Satisfaction Guarantee for two years.

Licensed under Georgia HVAC GAREGCN2011384, our technicians are EPA 608 certified (certification number PFWXHNZ4MT) and NATE certified (1023518). We are also factory authorized on Daikin, Trane, Rheem, and Carrier.

Most Alpharetta homes were built between 1995 and 2010, which means a large share of the city's HVAC equipment is now 15 to 30 years old (AC systems last 10 to 15 years here; gas furnaces 15 to 20). If your AC was the original equipment in a Windward or Crooked Creek building, you're in the window where parts get harder to source. R 22 refrigerant (phased out and now five times the cost it was in 2015) makes a repair vs replace choice straight-forward, and SEER2 rated replacements pay back in 4 to 7 years on Georgia Power bills. We'll tell you straight whether you're at that point or whether a repair gets you another season.

Why Alpharetta Homeowners Call One Hour

Alpharetta has more 15 to 30 year old HVAC systems concentrated in master planned subdivisions than almost any other North Fulton city. That's not a generic statement, it's the dominant pattern across Windward, Crooked Creek, White Columns, and the Webb Bridge corridor, where the original equipment from 1990s and 2000s buildouts is failing on the same predictable timeline.

24/7 service with no after hours premium

Same flat rate at 2 AM in July as at 2 PM in October. The trucks are stocked with the capacitors, contactors, blower motors, and refrigerant most common to the 13 SEER and 14 SEER systems installed across Alpharetta subdivisions in the late 1990s and 2000s.

Upfront flat rate pricing in writing before any work starts

You see the number, you approve the number, the number doesn't change.

Factory authorization on Daikin, Trane, Rheem, and Carrier

These four brands cover the equipment in most Alpharetta homes, including the OEM units in master planned communities where developers used a single brand across an entire phase.

Two year satisfaction guarantee

On workmanship, not the 30 or 90 days most companies offer.

We respect you, we respect your time. If we're late to a confirmed appointment, you don't pay.

Top HVAC Services We Provide in Alpharetta

AC Repair in AlpharettaCapacitor failures, refrigerant leaks at the evaporator coil, condensate drain clogs from pollen sludge, and blower motor failures are the four most common AC service calls in Alpharetta. Most are diagnosed and repaired in one visit because the parts are on the truck.

HVAC Maintenance and Comfort Club in AlpharettaOur Comfort Club covers seasonal tune ups, priority scheduling, and discounted repair pricing. For homes with original 1990s and 2000s equipment that's still running, maintenance is what extends the last 2 to 5 years out of it before replacement.

Pricing & Offers

Our service call and diagnosis is $89. That covers a certified technician visit, a full system diagnostic, and a written estimate. The fee is waived if you proceed with the recommended repair, and it's free for Comfort Club members.

There's no after hours premium. The 2 AM rate equals the 2 PM rate. All repair and installation quotes are flat rate, written, and approved before any work starts.

Service	Price	Notes
AC Repair	$228 – $3,000+	Where you fall in that range depends on the part. A capacitor swap sits near the low end; a compressor or evaporator coil refrigerant leak repair runs into the middle and upper range.
Furnace Repair	$361 – $2,575	A thermocouple or igniter replacement comes in at the low end. Heat exchanger work and blower motor assembly replacement push toward the high end.
AC Replacement	$2,500 – $8,000+	The price depends on the tonnage, SEER2 rating, brand, and whether the existing ductwork and refrigerant lines can be reused or need to be replaced. Financing is available as low as $109/month for a full system.
Furnace Replacement	$2,500 – $8,000+	The price depends on efficiency rating (80% AFUE vs 96%+ condensing), input BTU, and whether venting can be reused. The same financing applies.
Complete HVAC System	$7,000 – $25,000+	$7,000 to $25,000+. This is the range for a coordinated replacement of both pieces. For a 1995 Crooked Creek build where both the AC and furnace are original equipment, the top of this range buys variable speed, two stage, or full heat pump conversion with new line sets.
Comfort Club Plan	$177 / year	$177/year. Includes one AC tune up, one furnace tune up, priority scheduling, and 15% off all repairs. For homes with 15+ year old equipment, the two tune ups frequently catch degraded capacitors, weak contactors, and dirty coils before they turn into emergency calls in July.

Rebates available in Alpharetta

Georgia Power HEIP — Smart Thermostat

$75 per thermostat replacing a 10+ year old standard model.

Georgia Power HEIP — Home Comfort Bundle

Up to $1,250 for insulation + duct sealing + air sealing.

Georgia Home Energy Rebates

Up to $16,000, income dependent (energyrebates.georgia.gov).

Georgia HEAR

Up to 100% of project cost for installing a heat pump.

Recent Work Near Alpharetta

Windward

Two-story home, second floor zone running 6°F warmer than first floor in August, diagnosed undersized return air on upper level, added supplemental return, balanced zones, customer's August Georgia Power bill dropped $74.

Crooked Creek

1998 build with original Trane XL14i finally failing. Full replacement to Trane XR16 (16 SEER2), eligible for Georgia Power HEIP bundle when paired with duct sealing. Completed in one day.

Avalon

Townhome condensate drain backup flooding pan during pollen-heavy April. Cleared blockage, added drain line treatment via Comfort Club. No repeat call.

Neighborhoods We Serve in Alpharetta

Windward anchors the city's master-planned subdivision pattern. Most original equipment is from the late 1990s through mid 2000s, and current homeowners are facing the first major HVAC replacement often with the question of whether to convert to a heat pump or stay on the gas furnace + AC pairing.

Avalon mixed-use developments and townhomes need different work than the standard subdivision home. Most calls here are coordinated smart thermostat installs, HOA-restricted outdoor unit placement, and condensate routing on stacked or attached construction.

Downtown Alpharetta and the Old Milton Parkway corridor include older 1960s and 1980s ranch and split-level homes. Most are on their second or third HVAC system but still running original 1970s ductwork in attics, which is where the bigger efficiency gains usually live.

Windward

Crooked Creek

White Columns

Webb Bridge

Downtown Alpharetta

Old Milton Parkway

Avalon

Halcyon

Our Alpharetta Team Is Ready To Serve

Our Alpharetta crew is dispatched from our Union Hill Rd office. Every technician is EPA 608 certified (certification number PFWXHNZ4MT), NATE certified 1023518, and we're factory authorized on Daikin, Trane, Rheem, and Carrier.

Gallery and Video

One Hour HVAC technician inspecting AC unit North Atlanta

One Hour HVAC technician repairing heating system in attic North Atlanta

One Hour HVAC technician reviewing service options with homeowner North Atlanta

One Hour HVAC technician diagnosing heating system North Atlanta

One Hour technician showing indoor air quality product to homeowner

One Hour HVAC technician repairing AC unit for homeowner North Atlanta

Licensed GAREGCN2011384

EPA 608 Certified

NATE Certified

Factory Authorized: Daikin · Trane · Rheem · Carrier

2-Year Satisfaction Guarantee

Always On Time…Or You Don't Pay A Dime!®

FAQs About HVAC in Alpharetta

My Alpharetta home was built in 1998. Should I plan to replace my AC even if it's still running?

If it's the original equipment and uses R-22 refrigerant (phased out, now five times the 2015 cost), the math usually favors replacement once a major repair quote exceeds 50% of replacement cost. For 1998 equipment, that threshold gets hit on the first significant refrigerant leak or compressor issue. A like-for-like 14 SEER2 replacement typically pays back in 4 to 7 years on Georgia Power bills.

Do I need HOA approval to replace my outdoor AC unit in Windward or Avalon?

For most master-planned Alpharetta subdivisions, yes — if the unit changes location, footprint, or street visibility. We pull the existing pad and replace it in place when possible, which usually avoids review.

Is the federal heat pump tax credit still available in 2026?

No. The federal Section 25C tax credit for air-source heat pumps expired December 31, 2025 under the One Big Beautiful Bill Act. The Georgia state GEFA Home Energy Rebates program (up to $16,000 income dependent) is now the primary heat pump incentive — visit energyrebates.georgia.gov to check eligibility.

My second floor is always warmer than the first floor in summer. Sizing or ductwork?

Usually both in two-story Alpharetta subdivisions. Original 1990s and early 2000s installations in Windward and similar communities often have undersized return air upstairs and ductwork in unconditioned attic space leaking 20–30%. The diagnostic involves measuring static pressure, checking return air sizing, and inspecting attic ductwork — not just adding more BTUs of cooling.

Do you service homes in unincorporated Fulton County, or only inside city limits?

Both. Our service area covers Alpharetta city limits plus surrounding North Fulton, including unincorporated areas south toward Sandy Springs and north toward Milton. Same flat-rate pricing, same response times.

What's the difference between Comfort Club and calling when something breaks?

Comfort Club is $177/year and includes two seasonal tune-ups, priority dispatch, 15% off all repairs, and a waived diagnostic fee. For homes with 15+ year old equipment, the tune-up component frequently catches degraded capacitors, weak contactors, and dirty coils before they become an emergency call in July.

Why does my AC freeze up during pollen season in April and May?

Heavy oak, pine, and cedar pollen across North Fulton coats evaporator coils and clogs condensate drains. The coil can't release heat efficiently, the system runs longer, and eventually freezes over. Spring tune-ups specifically address this: coil cleaning, drain treatment, and filter replacement before pollen peaks.