Long's Refrigeration, 61 Years in HVAC Repair. During hot and humid summer months in Alabama, your HVAC/air-conditioning unit works hard to keep your home cool. In winter, your HVAC keeps your home warm, and cozy. At Longs Refrigeration for 61 years, we specialize in residential and commercial HVAC, and air conditioning unit. And we provide same-day service 24/7. We handle repairs, installation, and service for new residential and commercial construction.