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31 Years
experience
Emergency
services
Your Trusted HVAC Partner in Simi Valley
Custom Air Systems has been a family-owned HVAC provider since 1995, serving residential and commercial clients across the Los Angeles area. With over 26 years of experience, we specialize in designing, engineering, and installing complete comfort systems tailored to each property's unique needs. Our team of factory-trained technicians delivers sales, service, and installation with a commitment to quality, transparency, and customer satisfaction.

We pride ourselves on ethical business practices, competitive pricing, and a written guarantee backing all our work. From routine maintenance to emergency repairs, our goal is to ensure reliable heating and cooling solutions that maximize comfort and energy efficiency for every client.
Services
Residential HVAC Commercial HVAC System Installation Emergency Repairs Air Quality Solutions
Details
  • Year established: 1995
Highlights and features
  • We offer 26+ years of HVAC expertise in Simi Valley and surrounding areas
  • Our family-owned team prioritizes personalized service and transparency
  • We provide free estimates for all new HVAC installations
  • Our technicians are factory-trained and certified by Carrier
  • We guarantee upfront pricing and hassle-free service experiences
Associations and certifications
  • Carrier
What people say
Outstanding customer service Exceptionally prompt and responsive Complex issue first rate Thorough job every time Knowledgeable and reliable team
Services
Residential HVAC
Custom Air Systems designs and maintains heating, ventilation, and air conditioning systems for residential properties. Our technicians assess home size, insulation, and climate needs to recommend energy-efficient solutions. We handle installations, repairs, and seasonal maintenance to ensure optimal performance and indoor air quality for homeowners.
Commercial HVAC
We provide tailored HVAC solutions for commercial buildings including system design, installation, and preventive maintenance. Our team addresses complex requirements like multi-zone temperature control and compliance with industry regulations. Services include energy audits, ductwork optimization, and emergency repair services for business continuity.
System Installation
Our installation process begins with a comprehensive assessment of building requirements. We select appropriately sized equipment, install energy-efficient ductwork, and ensure proper refrigerant charging. All installations include system testing, performance verification, and customer education on operation and maintenance best practices.
Emergency Repairs
We offer prompt repair services for HVAC system failures including refrigerant leaks, electrical issues, and component malfunctions. Our technicians diagnose problems using advanced tools and prioritize restoring comfort while identifying root causes to prevent future issues through our scheduled maintenance programs.
Air Quality Solutions
Our indoor air quality specialists recommend solutions like air purifiers, humidity control systems, and ventilation upgrades. We address allergens, pollutants, and moisture issues through customized filtration systems and duct cleaning services that improve respiratory health and system efficiency.
People
Martin Fraye
President
Martin Fraye leads Custom Air Systems as President, maintaining the family-owned business's commitment to quality since its founding. He oversees operations while ensuring customer and employee satisfaction through ethical practices and technical excellence in HVAC services.
Questions
What HVAC services do you offer for residential customers?
We provide complete residential HVAC services including system installation, seasonal maintenance, emergency repairs, and indoor air quality solutions tailored to home environments.
Do you offer 24/7 emergency HVAC service?
Yes, we provide emergency repair services for urgent HVAC issues with prompt response times during regular business hours.
Are your technicians certified and trained?
All our technicians are factory-trained and certified by Carrier, with ongoing professional development to maintain technical expertise.
What areas do you serve?
We serve Simi Valley, Los Angeles, Ventura Valley, and surrounding areas including Beverly Hills, Malibu, and Thousand Oaks.
Do you offer financing options for new HVAC systems?
Yes, we offer financing options with approved credit for new HVAC installations and major system upgrades.
What makes Custom Air Systems different from competitors?
As a family-owned business since 1995, we combine technical expertise with personalized service, written guarantees, and Carrier-certified solutions for lasting comfort.