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About
At Blue Diamond Heating & Air-Conditioning, we’re a proudly family-owned and operated business based in San Diego that specializes in residential ductless mini-splits, new system installations, routine service and maintenance, and indoor air quality enhancements. We bring premium craftsmanship, full transparency, and a customer-first mindset to every job — no subcontractors, fully-branded vans, and a commitment to lifetime workmanship.
- English
- Spanish
May 2019 (7 years)
405 Vernon Way, El Cajon, CA, 92020
This pro has insurance and a valid business license. We regularly check the status of contractor licenses to ensure they are a reputable and trustworthy business.
Services
- Heat pumps (ducted central air)
- Heat pumps (ductless mini-splits)
- Air to water heat pumps
- Ground source heat pumps (geothermal)
- Water source heat pumps
- Fresh air systems
- Whole house fans
- Smart thermostats
- Indoor air quality assessments
- Heat pump hybrid water heaters
- Air sealing
- Insulation
- Ductwork
- Energy efficiency improvements
- Commercial
- Multi-family home
- Remodel / retrofit
- Service / maintenance
- Single-family home
Project gallery
Credentials
This pro participates in the following programs.
TECH Clean California
TECH HVAC
Participating contractors meet rigorous training standards to install energy-efficient electric appliances. Customers can access attractive rebates to help fund home electrification projects.
Visit program websiteHEEHRA Rebates
Single Family
Significant incentives available to income-eligible California residents for adopting energy-efficient technologies. Exclusively available through TECH Clean California-certified, HEEHRA-trained contractors.
Visit program website
- NATE HP Specialty
- National Comfort Institute (NCI)
Incentives
- Financing options available
Additional information
- Located in a disadvantaged community
- Small Business