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– Professionally Trained Hvac Technicians
– Residential & Commercial – 24 Hours / 7 Days
– Always Prompt, Honest, & Reliable


Over 250,000 Satisfied Clients
Read what customers have to say



  • Heating and Air Repair San Diego
  • Thermostats
  • Whole House Air Purification
  • Apartments & Condominiums
  • Scheduled Maintenance
  • Furnace Repair in San Diego
  • Service Calls – Fast Response
  • Duct Inspection & Sealing
  • Heat Pumps & Energy Savings
  • Humidifiers
  • Zoning for Savings & Comfort
  • Property Management Services
  • Garbage Disposals
  • Tankless Water Heaters
  • Sinks, Bathtubs & Toilets
  • Low Water Pressure
  • Earthquake Shut-off Valves
  • Backflow Prevention
  • Water Heaters
  • Shower Repair & Replacements
  • Water Softener Installation
  • Re-piping With Copper
  • Burst Pipes
  • Gas Lines


“I called them up at 10pm because we had a sudden burst pipe in our home. They were there within the hour, the owner assured us that it was going to be great and explained to us exactly what they were doing. They really went above and beyond our expectations. All of our stuff was put back together perfectly, and we were VERY happy with how it all turned out. Definitely our new favorite company.” -Mark G. San Diego, CA


“We needed our AC system repaired on a very hot day. They arrived promptly less than hour after I called them and fixed our home AC system without delay. Their prices were very reasonable and the technician that they sent was really friendly & knowledgeable. I fully recommend Ace Contractors!” -Albert H. San Diego, CA

HVAC National City

HVAC National CityA normal HVAC services firm clocks in and clocks out with little interest in the National City community that they are serving. They arrive for jobs and complete the required tasks with little enthusiasm and merely do what’s necessary to finish the task. Ace Contractors is no ordinary HVAC and plumbing firm. We are your local experts and are the people you should call to get quality, well-rounded services day or night. Our technicians arrive promptly with a positive attitude and go above and beyond to satisfy our customers. That’s why more than 250,000 people have used us for their projects and also refer us to friends and relatives.

HVAC Contractor – Professionally Trained and Highly Skilled for Residential & Commercial Repair Service

When your AC is down during the hot and sticky summer months, you are already more than frustrated. The last thing you need to deal with is a lousy contractor who takes too many breaks and is always on the phone. You need the problem handled swiftly and efficiently. We can do that. Call us right away for your air conditioning service or general repairs.

  • Emergency Service
  • Open 24 Hours
  • Same-Day Service
  • Residential & Commercial
  • Thermostat Upgrades (Wifi)
  • Light Commercial HVAC
  • Duct Cleaning
  • Exhaust Fans
  • Whole Home Re-Ductings
  • Preventative HVAC Maintenance Packages
  • Air Conditioning
  • Split Systems
  • Ductless Systems
  • Heating
  • HVAC Systems
  • Cooling Systems
  • Air Conditioner Installation
  • Central AC
  • AC Repair
  • Chillers
  • HVAC Controls
  • Equipment System Integrations
  • Energy Management
  • Furnace Installation & Repair
  • Pilot
  • Heat Pumps
  • Hybrid Systems
  • Wall Heater
  • Floor Heaters
  • Boilers
  • Air Purification
  • Air Filter Cleaning
  • Electronic Air Cleaners
  • UV Light Systems

Tankless Water Heater Service & Repair

National City residents are among some of California’s finest. We know that you want the best appliances for your homes and businesses. Therefore, we work late and constantly receive education about the latest trends in the plumbing industry. Our products and services can’t be matched because they come from brand names that you know and trust. If you need a new tankless water heater, don’t delegate the job to no company other than Ace.

Heating Service & Repair National City

We are a popular choice for heating services in the National City area because our clients know that they can depend on us. We offer a guaranteed 24-hour emergency service for clients who need us right away. We know all problems don’t happen at convenient times, so we make ourselves available to you 24/7. Call now!

national city heating ventilation and cooling

Diamond Ace Contractors
National City