Best HVAC Companies in San Diego, California

Hensel Consulting Engineers delivers mechanical and plumbing design, Title 24 energy compliance, system assessments, and project management for architects, contractors, and homeowners. Since 2003 they have completed hundreds of mechanical projects, thousands of Title 24 reports, and managed budgets ranging from $5 K to $140 M, emphasizing on‑time, on‑budget delivery, transparent, professional.

San Diego Air Comfort offers residential and commercial HVAC installations, maintenance, repairs, heat‑pump and duct‑cleaning services. The company holds a 4.9‑star rating from 51 Google reviews, with customers noting prompt service, custom solutions, fair pricing, and knowledgeable technicians. Discounts include senior, military, and a free smart thermostat with installation available.

Nice and Cold Heating & Air is a family‑owned HVAC provider offering comprehensive heating, air‑conditioning, and indoor‑air‑quality solutions. Services include smart Wi‑Fi thermostats, duct work, heat pumps, central and ductless systems, furnace repair, UV lighting, and air purifiers. Customers praise prompt, reliable, thorough, professional, consistent service and a community‑focused approach.

San Diego Air Conditioning Contractor holds a 5‑star rating from 18 reviews and offers free consultations. Services include electric baseboard heating, heating and AC wiring, and AC troubleshooting, plus system cleaning and maintenance. The team accepts debit and credit cards, showcases a photo gallery, and features customer testimonials online support.

Top Cooling Guys offers residential and commercial HVAC services across San Diego, including heating repair, AC installation, duct cleaning, UV germicidal light maintenance, thermostat and zone system support. They work with brands such as Carrier, Trane, Lennox, and provide licensed, insured technicians, maintenance plans, free quotes, and a satisfaction guarantee.

Castle Comfort offers reliable HVAC and light plumbing services, emphasizing quality workmanship and year‑round home comfort. The company holds a license, bond, and insurance (Lic#1034840) and serves San Diego County. Customer feedback shows a 5‑star rating from 75 reviews, praising honesty, responsiveness, and service for residential and commercial clients today.

Same Day Heating, Cooling, Plumbing provides comprehensive HVAC and plumbing solutions across San Diego, including heater, AC, heat‑pump repair, installation, and maintenance, plus water‑heater, sewer, drain, and leak services. The company offers a same‑day service guarantee, a two‑year warranty, financing options, and carries major brands such as Carrier, Trane, and Lennox.

Five Star Service Company offers certified HVAC solutions in San Diego, covering air‑conditioning repair, installation, heating services, and indoor‑air‑quality upgrades. Customers note prompt, professional technicians, detailed troubleshooting that saved costs, and a straightforward 100 % satisfaction guarantee. Their licensed team serves residential and commercial properties across the county throughout the region.

Air Direct Heating & AC is a top Air Conditioning Contractor providing professional HVAC services since 2007. Fully licensed & insured, we handle light commercial construction projects and repair jobs with excellence.

Cruz Comfort Heating & Air offers heating, air‑conditioning and water‑heater installation, repair, and maintenance across San Diego County. The company lists services for new‑construction projects and serves more than a dozen communities, including Ramona, El Cajon and Poway. It holds a CSLB license (#1119997) and cites 27 years of industry experience for residents.

FRYE Mechanical offers full‑service HVAC solutions across San Diego County, covering residential and commercial installation, repair, maintenance, and emergency support. The licensed, insured and bonded team emphasizes transparent pricing, 24/7 response, and family‑owned reliability. Positive BBB rating and extensive service area reinforce its reputation for consistent, cost‑effective climate control quality.

Pros HVAC offers residential heating and cooling services in Ramona, covering AC and furnace repairs, ductwork, heat‑pump installation, smart‑thermostat upgrades, indoor‑air quality solutions, and full system replacements. They provide 24/7 emergency response, seasonal tune‑ups throughout the year, airflow balancing, and transparent pricing for local homeowners, and consistent comfort for families.