HVAC Contractors in Holland, NY

Climate Diagnostics LLC is a Buffalo-based residential and commercial heating and cooling company founded by Brian Lorek that provides HVAC design, installation, repair, duct repair, indoor air quality solutions, and maintenance services across Erie County. Climate Diagnostics LLC aims to deliver high-quality heating and cooling systems at competitive prices while keeping jobsites neat and providing transparent, customer-focused service; the company emphasizes experienced technical staff (25+ years combined experience), a one-year labor warranty on installations, money-saving service and maintenance contracts, and authorized-dealer partnerships with brands such as RUUD and Mitsubishi.

Isaac Heating & Air Conditioning is a family-owned full-service HVAC, plumbing, electrical, insulation, and commercial services company serving multiple regions across New York (Rochester, Canandaigua, Avon, Twin Tiers, Syracuse, and Buffalo). Isaac Heating & Air Conditioning provides installation, repair, and maintenance for heating and cooling systems (furnaces, boilers, heat pumps, central and ductless AC), plumbing services (drains, sewer repair, water heaters, sump pumps, leak detection), electrical work (repairs, panels, generators, lighting), insulation and air-sealing, and commercial HVAC solutions, backed by licensed technicians, 24-hour emergency service, membership/care plans, financing options, and a focus on responsive, transparent customer service and community-oriented support.

Radiant Mechanical (Mechanical Services by Radiant Inc.), established in 2004 and based at 1509 Clinton St., Buffalo, NY, is a full-service home services contractor serving Western New York that provides licensed plumbing, heating and air-conditioning, electrical work, and general construction and remodeling. Radiant Mechanical offers installation, repair, maintenance, drain and sewer services (including camera inspections and excavation), tankless water heater solutions, HVAC system work and air-quality services, and kitchen and bathroom remodeling, with a focus on honest, affordable, and efficient service delivered by experienced technicians who provide accurate estimates and fast response.

Reimer Home Services is a Western New York home services company founded in 1921 that provides day-or-night HVAC, plumbing, and electrical services across Buffalo, Rochester, Albany and surrounding communities. Reimer Home Services offers air conditioning and heating installation, repair, and maintenance (including furnaces, boilers, heat pumps, ductless systems), plumbing services such as drain cleaning, sewer-line work, water-heater repair and tankless installations, electrical services including panel upgrades, EV charger and whole-home generator installation, and indoor air quality solutions and air-scrubber installations; the company also provides maintenance plans, financing options, multiple service locations (Cheektowaga, Hamburg, Rochester, Clifton Park), a 24/7 call center, and multiple customer satisfaction guarantees.

Zenner & Ritter is a Buffalo-based full-service HVAC, plumbing, air quality, and generator company with decades of local experience serving Western New York. Zenner & Ritter provides installation, repair, and maintenance for heating and cooling systems (furnaces, boilers, heat pumps, ductless systems, and central A/C), plumbing services including tank and tankless water heaters and sump pumps, whole-house air filtration and duct services, and generator sales, installation, and maintenance; the company offers 24/7 emergency service, flexible financing, and Priority Partner maintenance plans focused on reliability, energy efficiency, and long-term customer satisfaction from its Buffalo location at 3404 Bailey Ave.