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Claim This BusinessNext Hvac operates as a locally owned heating and cooling contractor in Waxhaw, North Carolina, with an unblemished 5-star average drawn from 236 client reviews. Owner Siarhei Buidak leads a crew that keeps phones answered and trucks rolling around the clock, seven days a week, every day of the year. The company serves Waxhaw alongside neighboring Union County communities, tackling everything from failing thermostats to full-system replacements for homeowners who have been cycling through one call-in contractor after another.
What separates Next Hvac from the field is the combination of continuous availability and a methodical diagnostic approach. Siarhei Buidak has been described by clients as a technician who opens the outdoor unit in front of the customer, displays live temperature and charge readings on his electrical test gadgets, and confirms findings with an electronic leak detector before quoting any repair. The company handles both heating and cooling systems, covering heat pumps, central air conditioning, and water heaters without routing calls to a dispatcher or a third-party subcontractor.
During the Thanksgiving holiday, Yoke Chung's heating system failed entirely. A same-day visit from the Next Hvac crew revealed a cracked heat exchanger in the heater and an air conditioner near the end of its service life, leading to a full dual-system replacement that the owner managed from estimation through final installation. Samantha Lackey called in the morning after her thermostat stopped communicating with her downstairs zone and had a technician at her door the same evening, resolving the issue in under two hours and leaving her heated space fully operational. Reviewers across the board specifically name owner Siarhei Buidak for his technical precision and his habit of showing customers video evidence of what he finds inside their equipment.
Of 236 five-star reviews, at least four customers describe an emergency or same-day response, and three specifically name owner Siarhei Buidak as the technician on-site. Across every review the company is praised for arriving quickly, explaining findings clearly, and completing repairs without a callback to a different contractor.
| Sunday | Open 24 hours |
| Monday | Open 24 hours |
| Tuesday | Open 24 hours |
| Wednesday | Open 24 hours |
| ThursdayToday | Open 24 hours |
| Friday | Open 24 hours |
| Saturday | Open 24 hours |
Diagnosing and fixing failing furnaces and heat pumps, including cracked heat exchangers and faulty components identified on-site.
Central air conditioning repair, maintenance, and new installation covering systems near end of life or showing refrigerant leaks.
Heat pump systems installed and serviced for both residential heating and cooling needs.
Troubleshooting thermostat communication failures and incorrect zone wiring that prevents heating in specific areas.
Full-system quotes managed by the owner from initial inspection through installation, with live equipment data shown to the customer.
Electronic leak detection with video confirmation of micro leaks in outdoor coils and handler units before repair authorization.
Water heater sales and installation included as a standalone service category on the Next Hvac website.