Your Local Heating, Air & Plumbing Pros — Since 1980

Family-Owned Heating, Plumbing, and Air Solutions

At THA Heating Air & Plumbing Inc., we have put our heart into serving San Diego’s families and businesses since 1980. As a family-owned and locally operated company, we treat our customers the way we’d want to be treated—fairly and with respect. Our team of licensed and insured professionals delivers proven results and exceptional service, no matter how big or small the job.



We are proud to be a BBB-accredited business, with a long record of happy clients and reliable work. Our focus on heating, plumbing, and air conditioning helps you stay comfortable no matter the season.

A Full Range of Heating, Plumbing, and Air Services

THA provides residential and commercial services across San Diego. Every installation, maintenance, or repair gets our full attention and honest advice. We work with top brands like Carrier, Bryant, and Trane, making sure your home or business is equipped with the best in comfort technology.

Our services include:


  • Plumbing: Installations, repairs, and maintenance for any system
  • Heating: Repairs, tune-ups, installations, and duct cleaning
  • Air conditioning: Service for all brands, including ductless mini-split systems
  • HVAC: Full system inspections, maintenance, and upgrades


We know emergencies can happen at any time, so we offer 24/7 emergency calls. For those considering upgrades, we provide free estimates and financing options on new installations.

The THA Process for Better Comfort

Our process sets us apart. When a THA adviser visits your home or business, we don’t rush. We start by listening to your needs and concerns, then perform a complete inspection. Our experts:


  • Discuss your energy bills and compare them to efficient local properties.
  • Check room sizes, windows, insulation, and other building features
  • Perform a Manual J Load calculation for precise air conditioning sizing
  • Measure current heating, air, and plumbing system performance
  • Look for leaks, inefficiency, and ways to improve comfort.


We explain what we find in simple terms. Our team always aims to help you save energy and money, with honest suggestions for repairs, maintenance, or replacement.

Personalized Recommendations for Every Property

No two homes—or businesses—in San Diego are the same, so we never offer cookie-cutter solutions. After our inspection, we review your building’s specific needs, performance, and your budget.


We rate your system compared to others in the San Diego area and provide clear recommendations. Our experts focus on what is best for your home, business, or family—always at fair prices. We can help with small repairs, full system upgrades, or tips to keep your current system working longer.

If you are looking for reliable heating, plumbing, or air conditioning services in San Diego, choose THA Heating Air & Plumbing Inc. Call (858) 571-8865 for trusted care and service every time!