GAC Services
Gaithersburg, MD HVAC · #1 of 5 · 56+ yrs
At a glance
- Google rating
- 4.9★ from 7,720+ reviews
- In business
- 56+ years
- Services
- 10 HVAC services
- Service area
- Gaithersburg, MD + 5 nearby
- Phone
- +1-301-202-1641
GAC Services as a HVAC provider
Gaithersburg, MD HVAC · #1 of 5 · 56+ yrs
GAC Services focuses on high-volume AC repair work across Montgomery County. GAC Services notes flexible financing options on its site. GAC Services has served Maryland homeowners since 1970. GAC Services advertises same-day and 24/7 emergency response availability. GAC Services lists indoor air quality and duct services alongside installations.
Residential HVAC repairs and replacements across Gaithersburg and Montgomery County. Emergency response advertised: 24/7 availability for urgent no-heat or no-cool calls. Financing options listed online, with flexible plans advertised. Years in business: 55+ years serving Maryland homeowners and nearby communities.
Above the Gaithersburg, MD HVAC average of 83/100. Ranks #1 of 5 listed HVAC providers in Gaithersburg, MD.
| Signal | GAC Services | Gaithersburg avg | Delta |
|---|---|---|---|
| Vouched Score | 94/100 | 83/100 | +11 vs avg |
| Google rating | 4.9★ | 4.9★ | matches city average |
| Review volume | 7,720+ | 2,300+ | +5424 vs avg |
| Years in business | 56+ | 29+ | +27 vs avg |
- High Google rating (4.9★ across 7,720+ reviews)
- Long-established (56+ years in business)
- Emergency response: 24/7
- Financing available
- Specializes in AC repair
- You need duct cleaning
- You need same-day or after-hours service
- You need to finance the work
- You have a commercial property
- You want a top-rated provider with substantial review history (4.9★, 7,720+ reviews)
- You want a BBB-rated firm specifically
| Provider | Vouched | Years | BBB | Yelp | Our picks | |
|---|---|---|---|---|---|---|
GAC Services (this company) |
94/100 | 4.9★ (7,720+) | 56+ | — | — | Highest Vouched Score Smart Thermostat Install |
| 80/100 | 4.9★ (395+) | 7+ | — | — | Best for Rebates & Tax Credits Best NATE-Certified Team |
|
| 75/100 | 4.9★ (175+) | 16+ | — | — | Best for Ductwork & Sealing Best for Energy-Efficient Systems |
|
| 84/100 | 4.8★ (690+) | 45+ | — | — | — |
GAC Services as a AC Replacement provider
Gaithersburg, MD AC Replacement · #1 of 4 · 56+ yrs
High-efficiency variable-speed upgrades are listed as a specialty on their site. The company reports flexible financing options for large HVAC jobs. GAC Services has served Maryland homeowners for 55+ years. Their Gaithersburg location notes familiarity with hot, humid summers and local housing stock. Scheduling and emergency response are advertised for same-day and 24/7 needs.
Central AC installation and replacement for Gaithersburg homes, including heat pumps and ductless systems. High-efficiency variable-speed equipment is listed as a specific upgrade option. Financing options are advertised for larger changeouts with flexible terms. Years in business reported as 55+ years serving Maryland homeowners.
Above the Gaithersburg, MD AC Replacement average of 81/100. Ranks #1 of 4 listed AC Replacement providers in Gaithersburg, MD.
| Signal | GAC Services | Gaithersburg avg | Delta |
|---|---|---|---|
| Vouched Score | 89/100 | 81/100 | +8 vs avg |
| Google rating | 4.9★ | 4.9★ | matches city average |
| Review volume | 7,725+ | 2,245+ | +5478 vs avg |
| Years in business | 56+ | 31+ | +25 vs avg |
- High Google rating (4.9★ across 7,725+ reviews)
- Long-established (56+ years in business)
- Emergency response: 24/7
- Financing available
- You need same-day AC replacement
- You need same-day or after-hours service
- You need to finance the work
- You want a top-rated provider with substantial review history (4.9★, 7,725+ reviews)
- You value a long-tenured local operator (56+ years in business)
- You want a BBB-rated firm specifically
| Provider | Vouched | Years | BBB | Yelp | Our picks | |
|---|---|---|---|---|---|---|
GAC Services (this company) |
89/100 | 4.9★ (7,725+) | 56+ | — | — | Best for High-Efficiency Upgrades |
| 79/100 | 4.9★ (395+) | 7+ | — | — | Best NATE-Certified Installer | |
| 79/100 | 4.8★ (690+) | 45+ | — | — | — | |
| 76/100 | 4.9★ (175+) | 16+ | — | — | Best for Proper Sizing Best for Full-System Changeout |
GAC Services as a Furnace Replacement provider
Gaithersburg, MD Furnace Replacement · #1 of 4 · 56+ yrs
GAC Services advertises dedicated furnace replacement expertise across Montgomery County. The company lists flexible financing options on its site. GAC Services notes emergency response with 24/7 and same-day replacement availability. Founded in 1970, the company reports over 55+ years serving local homeowners. Gaithersburg winters and humid summers make reliable heating and prompt service important here.
Furnace replacement and gas-furnace installation services for Gaithersburg and surrounding Maryland communities. High-efficiency systems: site copy notes work on newer, high-efficiency furnaces. Emergency response: the website states 24/7 and same-day replacement availability. Years in business: founded 1970, about 55+ years serving the area.
Above the Gaithersburg, MD Furnace Replacement average of 75/100. Ranks #1 of 4 listed Furnace Replacement providers in Gaithersburg, MD.
| Signal | GAC Services | Gaithersburg avg | Delta |
|---|---|---|---|
| Vouched Score | 89/100 | 75/100 | +14 vs avg |
| Google rating | 4.9★ | 4.9★ | matches city average |
| Review volume | 7,725+ | 2,245+ | +5478 vs avg |
| Years in business | 56+ | 31+ | +25 vs avg |
- High Google rating (4.9★ across 7,725+ reviews)
- Long-established (56+ years in business)
- Emergency response: 24/7
- Financing available
- Specializes in furnace replacement
- Specializes in emergency
- You need same-day furnace replacement
- You need same-day or after-hours service
- You need to finance the work
- You want a top-rated provider with substantial review history (4.9★, 7,725+ reviews)
- You value a long-tenured local operator (56+ years in business)
- You want a BBB-rated firm specifically
| Provider | Vouched | Years | BBB | Yelp | Our picks | |
|---|---|---|---|---|---|---|
GAC Services (this company) |
89/100 | 4.9★ (7,725+) | 56+ | — | — | Best for High-Efficiency (95%+ AFUE) Upgrades Best for Gas Furnace Replacement |
| 77/100 | 4.9★ (395+) | 7+ | — | — | Best for Furnace + AC Changeout Best NATE-Certified Installer |
|
| 72/100 | 4.9★ (175+) | 16+ | — | — | — | |
| 63/100 | 4.8★ (690+) | 45+ | — | — | — |
GAC Services as a AC Repair provider
Gaithersburg, MD AC Repair · #1 of 4 · 56+ yrs
GAC Services advertises specialized AC repair with leak detection and refrigerant recharge workflows.
AC repair for Gaithersburg homes, focusing on leak detection and refrigerant services. Leak detection equipment is listed and refrigerant leak-and-recharge work is advertised on their site. Founded in 1970, GAC Services brings 55+ years of local experience. They state 24/7 emergency and same-day response, and list flexible financing options.
Above the Gaithersburg, MD AC Repair average of 81/100. Ranks #1 of 4 listed AC Repair providers in Gaithersburg, MD.
| Signal | GAC Services | Gaithersburg avg | Delta |
|---|---|---|---|
| Vouched Score | 88/100 | 81/100 | +7 vs avg |
| Google rating | 4.9★ | 4.9★ | matches city average |
| Review volume | 7,725+ | 2,245+ | +5478 vs avg |
| Years in business | 56+ | 31+ | +25 vs avg |
- High Google rating (4.9★ across 7,725+ reviews)
- Long-established (56+ years in business)
- Emergency response: 24/7
- Financing available
- Specializes in AC repair
- You need AC refrigerant leak repair
- You need AC tune-up & maintenance
- You need same-day or after-hours service
- You need to finance the work
- You want a top-rated provider with substantial review history (4.9★, 7,725+ reviews)
- You want a BBB-rated firm specifically
| Provider | Vouched | Years | BBB | Yelp | Our picks | |
|---|---|---|---|---|---|---|
GAC Services (this company) |
88/100 | 4.9★ (7,725+) | 56+ | — | — | — |
| 82/100 | 4.8★ (690+) | 45+ | — | — | Best for Commercial AC Repair | |
| 79/100 | 4.9★ (395+) | 7+ | — | — | Best NATE-Certified Shop | |
| 75/100 | 4.9★ (175+) | 16+ | — | — | Best for Compressor Replacement Best Manufacturer-Authorized Repair |
GAC Services as a Emergency AC Repair provider
Gaithersburg, MD Emergency AC Repair · #1 of 5 · 56+ yrs
GAC Services states same-day AC repair plus 24/7 emergency response on their site. GAC Services notes service vehicles are stocked for first-visit fixes. GAC Services reports flexible financing options are available for repairs. GAC Services has 55+ years serving Gaithersburg and surrounding Montgomery County. Scheduling is described as responsive to speed dispatch and arrivals.
GAC Services handles emergency AC repair and same-day cooling response in Gaithersburg. Emergency Response: 24/7 is stated on their website. Service vehicles are stocked for first-visit fixes, per their site. The company has operated since 1970, listing 55+ years in business.
Above the Gaithersburg, MD Emergency AC Repair average of 81/100. Ranks #1 of 5 listed Emergency AC Repair providers in Gaithersburg, MD.
| Signal | GAC Services | Gaithersburg avg | Delta |
|---|---|---|---|
| Vouched Score | 88/100 | 81/100 | +7 vs avg |
| Google rating | 4.9★ | 4.9★ | matches city average |
| Review volume | 7,725+ | 2,300+ | +5425 vs avg |
| Years in business | 56+ | 29+ | +27 vs avg |
- High Google rating (4.9★ across 7,725+ reviews)
- Long-established (56+ years in business)
- Emergency response: 24/7
- Financing available
- You need same-day AC repair
- You need same-day or after-hours service
- You need to finance the work
- You want a top-rated provider with substantial review history (4.9★, 7,725+ reviews)
- You value a long-tenured local operator (56+ years in business)
- You want a BBB-rated firm specifically
| Provider | Vouched | Years | BBB | Yelp | Our picks | |
|---|---|---|---|---|---|---|
GAC Services (this company) |
88/100 | 4.9★ (7,725+) | 56+ | — | — | — |
| 87/100 | 4.8★ (2,510+) | 20+ | — | — | Highest Vouched Score No Overtime or Holiday Surcharge Best for No-Cooling Emergencies |
|
| 79/100 | 4.8★ (690+) | 45+ | — | — | Best for Commercial Emergencies | |
| 77/100 | 4.9★ (175+) | 16+ | — | — | — |
GAC Services as a Heat Pump Installation provider
Gaithersburg, MD Heat Pump Installation · #1 of 3 · 56+ yrs
GAC Services lists ducted air-source heat pump installation experience for Maryland homes.
Ducted air-source heat pump installation for Gaithersburg and Montgomery County homes. Years in Business: 55+ years serving Maryland homeowners. Financing Available: flexible financing options advertised for HVAC projects. Emergency Response: 24/7 emergency service and same-day service listed on their site.
Above the Gaithersburg, MD Heat Pump Installation average of 80/100. Ranks #1 of 3 listed Heat Pump Installation providers in Gaithersburg, MD.
| Signal | GAC Services | Gaithersburg avg | Delta |
|---|---|---|---|
| Vouched Score | 87/100 | 80/100 | +7 vs avg |
| Google rating | 4.9★ | 4.9★ | matches city average |
| Review volume | 7,725+ | 2,935+ | +4788 vs avg |
| Years in business | 56+ | 36+ | +20 vs avg |
- High Google rating (4.9★ across 7,725+ reviews)
- Long-established (56+ years in business)
- Emergency response: 24/7
- Financing available
- You need same-day or after-hours service
- You need to finance the work
- You want a top-rated provider with substantial review history (4.9★, 7,725+ reviews)
- You value a long-tenured local operator (56+ years in business)
- You want a BBB-rated firm specifically
| Provider | Vouched | Years | BBB | Yelp | Our picks | |
|---|---|---|---|---|---|---|
GAC Services (this company) |
87/100 | 4.9★ (7,725+) | 56+ | — | — | — |
| 78/100 | 4.8★ (690+) | 45+ | — | — | — | |
| 75/100 | 4.9★ (395+) | 7+ | — | — | — |
GAC Services as a Mini-Split Installation provider
Gaithersburg, MD Mini-Split Installation · #1 of 5 · 56+ yrs
Flexible financing options are listed for high-ticket HVAC projects, per their site.
Ductless mini-split installation across Gaithersburg and Montgomery County, Maryland. Years in business: 55+ years serving local homes. Financing Available: flexible financing options advertised on their site. Emergency service advertised as 24/7 and same-day availability.
Above the Gaithersburg, MD Mini-Split Installation average of 79/100. Ranks #1 of 5 listed Mini-Split Installation providers in Gaithersburg, MD.
| Signal | GAC Services | Gaithersburg avg | Delta |
|---|---|---|---|
| Vouched Score | 87/100 | 79/100 | +8 vs avg |
| Google rating | 4.9★ | 4.9★ | matches city average |
| Review volume | 7,725+ | 1,860+ | +5864 vs avg |
| Years in business | 56+ | 37+ | +19 vs avg |
- High Google rating (4.9★ across 7,725+ reviews)
- Long-established (56+ years in business)
- Emergency response: 24/7
- Financing available
- You need same-day or after-hours service
- You need to finance the work
- You want a top-rated provider with substantial review history (4.9★, 7,725+ reviews)
- You value a long-tenured local operator (56+ years in business)
- You want a BBB-rated firm specifically
| Provider | Vouched | Years | BBB | Yelp | Our picks | |
|---|---|---|---|---|---|---|
GAC Services (this company) |
87/100 | 4.9★ (7,725+) | 56+ | — | — | Highest Vouched Score |
| 78/100 | 4.8★ (690+) | 45+ | — | — | Best for Mini-Split Repair | |
| 77/100 | 4.9★ (315+) | 60+ | — | — | Best for Commercial / VRF | |
| 76/100 | 4.9★ (395+) | 7+ | — | — | — |
GAC Services as a Furnace Repair provider
Gaithersburg, MD Furnace Repair · #1 of 3 · 56+ yrs
GAC Services advertises 24/7 emergency response for no-heat calls. GAC Services lists furnace repair, diagnostics, and heat exchanger repair. GAC Services notes they have served homeowners since the 1970s. GAC Services says technicians are familiar with Kentlands and Montgomery Village home setups. GAC Services says most work comes from repeat customers and referrals.
Furnace repair and no-heat emergency response (24/7) for Gaithersburg and Montgomery County homeowners. Specializations list furnace diagnostics and heat exchanger repair, per their site. Financing options are advertised for larger repairs. GAC Services notes serving homeowners since the 1970s, about 55+ years.
Above the Gaithersburg, MD Furnace Repair average of 81/100. Ranks #1 of 3 listed Furnace Repair providers in Gaithersburg, MD.
| Signal | GAC Services | Gaithersburg avg | Delta |
|---|---|---|---|
| Vouched Score | 86/100 | 81/100 | +5 vs avg |
| Google rating | 4.9★ | 4.9★ | matches city average |
| Review volume | 7,725+ | 2,935+ | +4788 vs avg |
| Years in business | 56+ | 36+ | +20 vs avg |
- High Google rating (4.9★ across 7,725+ reviews)
- Long-established (56+ years in business)
- Emergency response: 24/7
- Financing available
- Specializes in emergency
- You need no-heat / emergency furnace repair
- You need furnace heat exchanger replacement
- You need gas furnace & combustion repair
- You need same-day or after-hours service
- You need to finance the work
- You want a BBB-rated firm specifically
| Provider | Vouched | Years | BBB | Yelp | Our picks | |
|---|---|---|---|---|---|---|
GAC Services (this company) |
86/100 | 4.9★ (7,725+) | 56+ | — | — | Best for Heat-Exchanger Replacement Best for Commercial Furnace Repair |
| 82/100 | 4.8★ (690+) | 45+ | — | — | — | |
| 75/100 | 4.9★ (395+) | 7+ | — | — | Best NATE-Certified Shop |
What customers say
Services
- AC Repair — Diagnostics and repair of central air conditioning systems — refrigerant leaks, capacitor and contactor failures, condenser fan motors, and thermostat issues.
- AC Replacement — Removal and replacement of an aging or failed central A/C — typically condenser, evaporator coil, and refrigerant lines.
- Indoor Air Quality — Indoor air-quality work: high-MERV filtration, UV systems, humidifiers/dehumidifiers, and duct sanitization.
- Mini-Split Systems — Mini-split installation and service — typically ductless, used for additions or zoned comfort.
- Duct Work — Ductwork inspection, sealing, and replacement — addresses leakage, undersized runs, and uneven room temperatures.
- HVAC Installation — Full HVAC system installation including indoor and outdoor equipment, ductwork tie-in, and refrigerant work.
- Commercial HVAC — Commercial HVAC service for offices, retail, and light-industrial spaces — rooftop units, package units, and split systems.
- Emergency HVAC Service — After-hours emergency response for no-cool and no-heat calls.
Service area
Contact & hours
Frequently asked questions
What are the pros of GAC Services?
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What is the Vouched Score for GAC Services?
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What does HVAC service typically cost when working with a Gaithersburg, MD provider like GAC Services?
What pricing terms does GAC Services publish on their website?
Does GAC Services do AC Repair in Gaithersburg, MD?
Does GAC Services do AC Replacement in Gaithersburg, MD?
Does GAC Services do Heat Pump Service in Gaithersburg, MD?
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Profile last updated July 20, 2026.