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Your Trusted HVAC Partner in Covina
Sinclair Air Systems has been a family-owned HVAC contractor serving Los Angeles County and the San Gabriel Valley for over three decades. Our licensed team specializes in residential and commercial HVAC installation, mini split systems, AC repair, and preventive maintenance, treating every customer with the trust and transparency they deserve. With decades of hands-on experience, we prioritize diagnosing issues efficiently and offering honest recommendations without high-pressure sales tactics.

Our commitment to community is reflected in our sponsorship of local youth sports teams, high school booster clubs, and support for charities and church programs. We pride ourselves on delivering dependable service at fair prices, ensuring long-lasting comfort for homes and businesses across Covina, La Verne, San Dimas, and Glendora.
Services
Residential HVAC Installation Commercial HVAC Service Mini Split Systems Preventive Maintenance AC Repair
Highlights and features
  • Over 30 years of HVAC expertise serving Los Angeles County
  • Family-owned business prioritizing trust and transparency
  • 24/7 emergency service for urgent HVAC needs
  • Energy-efficient solutions for residential and commercial properties
  • Active community involvement and local partnerships
Associations and certifications
  • Contractors License #724978 C20
What people say
Top of the line service Excellent pricing Punctual professionals Same day service Energy-efficient solutions
Services
Residential HVAC Installation
Our certified technicians install central air conditioning systems tailored to Southern California's climate. We provide customized solutions including condensers, evaporators, and ductwork configurations to ensure consistent cooling throughout your home. Energy-efficient units reduce electricity bills while maintaining optimal comfort.
Commercial HVAC Service
We offer comprehensive maintenance packages for commercial HVAC systems including routine inspections and preventive care. Our services extend equipment lifespan, prevent costly breakdowns, and maintain safe environments for employees and customers through regular system diagnostics and component checks.
Mini Split Systems
Our ductless mini-split installations provide zoned temperature control without extensive ductwork. These energy-efficient systems allow room-specific climate settings while saving space with compact outdoor units. Ideal for homes without existing duct systems or for targeted cooling needs.
Preventive Maintenance
Our maintenance plans include seasonal system checks, filter replacements, and performance optimizations. Regular servicing prevents unexpected failures, improves energy efficiency, and extends equipment lifespan. We offer semi-annual and quarterly service options for residential and commercial clients.
AC Repair
We provide rapid diagnosis and repair for malfunctioning HVAC systems. Our technicians carry common replacement parts and respond promptly to urgent cooling needs. Services include refrigerant leak repairs, compressor replacements, and electrical component troubleshooting for both residential and commercial systems.
People
Rick
Owner
Rick leads Sinclair Air Systems with over 30 years of HVAC industry experience. He personally oversees installations and repairs, maintaining direct relationships with clients. Known for honest assessments and fair pricing, Rick has built the company's reputation on integrity and quality workmanship.
Questions
What HVAC services does Sinclair Air Systems offer?
We provide residential and commercial HVAC installation, repair, and maintenance services including mini split systems, AC tune-ups, and emergency repairs.
How often should HVAC systems be serviced?
We recommend annual maintenance for residential systems and semi-annual checks for commercial HVAC equipment to ensure optimal performance and longevity.
Do you offer emergency HVAC services?
Yes, we provide 24/7 emergency service for urgent heating and cooling issues with same-day technician availability.
What areas do you serve?
We serve Covina, La Verne, San Dimas, Glendora, and surrounding areas in Los Angeles County and the San Gabriel Valley.
Are financing options available?
Yes, we offer financing options to make HVAC upgrades and replacements more affordable for residential and commercial clients.
What makes Sinclair different from other HVAC companies?
As a family-owned business with 30+ years local experience, we combine technical expertise with personalized service and community commitment.