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Claim This BusinessGreen Horizon One Hour Heating & Air Conditioning has maintained a strong presence in the Durham HVAC market, earning a 4.8-star rating across 899 customer reviews. The company holds proper licensing for residential and light commercial work throughout the Raleigh-Durham metropolitan area, including Cary, Chapel Hill, and surrounding Wake County neighborhoods. Operating from 7 AM to 7 PM on weekdays with Saturday hours until 3 PM, the company provides scheduled maintenance contracts through its Top Gun Comfort Club program, giving customers coverage for annual tune-ups and priority service calls.
What distinguishes Green Horizon is their dealer partnerships with major manufacturers including Amana and York, evident in recent installation reviews where technicians installed Amana S-series heat pumps replacing older York systems. The company advertises geothermal systems and high-efficiency variable-speed heat pumps rated up to 20 SEER, offering the kind of equipment that qualifies homeowners for utility rebates. Their indoor air quality offerings extend beyond standard filtration to include UV air sanitizer systems, crawl space sealing with vapor barriers, and whole-home humidifiers and dehumidifiers, a more comprehensive approach than basic AC repair shops.
Several reviewers specifically named technicians who resolved difficult situations. Frank, a senior technician referenced across multiple reviews, performed the heat pump installation for Tom Chuaypradit and returned twice afterward to make performance adjustments, achieving the quiet operation the homeowner expected. For Andrea Neusitz, technician Tyler arrived, diagnosed the problem quickly, and completed the repair in a single visit. Tatyana Kasperovich noted the company provided a narrow service time window and sent text updates when the technician was en route, a logistics touch that reduced her wait time.
Four of five detailed reviews mention specific technicians and report successful outcomes, with three customers noting the technician returned to ensure proper operation after initial installation. One negative review from 2024 cites billing disputes and unresolved service promises, while positive reviews emphasize the 10-year warranty coverage and maintenance program membership.
| Sunday | Closed |
| Monday | 7 AM–7 PM |
| Tuesday | 7 AM–7 PM |
| Wednesday | 7 AM–7 PM |
| ThursdayToday | 7 AM–7 PM |
| Friday | 7 AM–7 PM |
| Saturday | 7 AM–3 PM |
Inverter-driven variable-speed systems up to 20 SEER, including Amana and York brands with 10-year warranty coverage.
Diagnostic services, refrigerant recharging, and seasonal tune-ups for all major residential systems.
New ductwork layout, existing duct repair, and leak sealing to improve system efficiency.
UV sanitizers, whole-home humidifiers, dehumidifiers, and crawl space vapor barriers.
Gas and electric furnace diagnostics, heating element replacement, and winter emergency service.
Smart thermostat installation and programming for variable-speed system optimization.
Ground-source heat pump design and installation for high-efficiency_new construction.