Fortt Mechanical Inc can provide you with an hvac maintenance cost and service with little turnaround time. We have created maintenance plans for hundreds of clients.

Fortt Mechanical Inc. is a family owned and operated HVAC company based in Mission Viejo, California proudly serving Orange County and surrounding areas. We are dedicated to providing both residential and commercial clients with reliable, cost-effective HVAC repairs, including handling AC refrigerant leaks, installations, maintenance plans, parts, and more. Family-owned, 40+ years of experience, CA HVAC License #646285, and rated 5 stars from 10 reviews on Google, and 5/5 from 35 reviews on MapQuest. Need a second opinion? We diagnose the real problem and repair or replace only what is needed — no upselling a whole system. Call (949) 201-0491.

We Fix What Others Miss: Expert HVAC Troubleshooting in Mission Viejo

View Our Services
Fortt Mechanical is a full service HVAC company that offers expert maintenance, air conditioning, heating, and refrigeration services to Mission Viejo and the rest of Southern Orange County/SoCal.
Prime example of saving the customer money! Replaced just the condensing unit, as the old one was mismatched with the evaporator (undersized condenser) and it was failing on hot days.
Condensing unit changeout completed in Mission Viejo. Swapped out the old R22 condensing unit, which had a refrigerant leak that couldn't be repaired.
Custom sheet metal used for our installation in Signal Hill. Even with this fabrication the work was completed within 2 days.
New R454B condenser installed for a client in Huntington Beach. We saved her thousands by only replacing the outdoor equipment. The evaporator was modified to accept the new refrigerant.
Residential air conditioning condensing unit installation by Fortt Mechanical Inc. in Lake Forest off El Toro Rd. This is at the Prothero Mobile Home Park. Outdoor split system installed for energy efficiency and optimal cooling performance.
The outdoor half of the mini split installation completed in Orange, California. High efficiency system installed by Fortt Mechanical.
Mini split installation in Orange, California. ACPRO brand, high efficiency system.
Slimline, low-profile outdoor condensing unit installation by Fortt Mechanical Inc. at a residential property in Coto de Caza. Designed for maximum space efficiency and optimal cooling performance, this sleek unit ensures reliable HVAC operation whil
Fortt Mechanical is using a crane to lift an HVAC rooftop package unit onto the roof. We will diagnose your HVAC system with any problems or electrical issues or refrigerant leaks it may have. Quick, efficient, air conditioning service.
Rooftop package unit installation by Fortt Mechanical Inc. for a property management company at a commercial property in Cerritos. Our team expertly installed a new rooftop HVAC system, providing both heating and cooling solutions. This rooftop unit
Outdoor OXBOX air conditioning split system installed at a reasonable price for a client in Aliso Viejo. Air conditioning system installation Residential air conditioning Air conditioner repair completed and great customer satisfaction! Our central
Rooftop package unit installation by Fortt Mechanical Inc. for a property management company at a commercial property in Cerritos. Our team has provided excellent customer service to LINK Property Management for many years now. This rooftop unit is a
Cooling tower repair services provided by Fortt Mechanical Inc. for IVC Community College in Irvine. Our team repaired and restored the cooling tower to ensure efficient operation, optimizing energy use and performance for the school campus' system.
BAC cooling tower blower and shaft replaced for IVC Community College in Irvine. Job was completed in a couple hours, minimizing downtime. We repair and replace Baltimore Aircoil equipment as needed by our customers.
Residential air conditioning low profile, slimline condensing unit installation by Fortt Mechanical Inc. in Laguna Niguel.
Rooftop package unit installation in Lake Forest. Rooftop HVAC system repair in Mission Viejo. Fortt Mechanical installs commercial rooftop units such as Carrier, York, AC Pro, TRANE, in your area. HVAC package unit repairs and troubleshooting by ex
Furnace and evaporator coil and plenum in a closet, with ductwork, electrical, drain line, and custom sheet metal. Residential air conditioning work installed by Fortt Mechanical Inc. in Laguna Niguel. Installed for energy efficiency and optimal cool
Low-profile, high efficiency outdoor condensing unit installation by Fortt Mechanical Inc. at a residential property in Lake Forest. Designed for maximum space efficiency and optimal cooling performance, this sleek unit ensures reliable HVAC operatio
Commercial HVAC repairs near you. We primarily service Southern Orange County. Technicians are well trained and experienced, with over 30 years in the field.
Custom ductwork for a downshot, down shot rooftop package unit in Cerritos, Orange County, South OC. We provide second opinions and quick services to the Lake Forest and Mission Viejo area.
Rooftop package unit blower wheel replacement
Package unit installation completed in Signal Hill, Long Beach, in a very timely manner.
Package unit installation for a warehouse in Lake Forest. System was up and running same day.
Crane brought out for our package unit installation.
Crane services are sometimes required for rooftop HVAC changeouts.
Brand new condensing unit installed in Irvine.
Final installation picture, completed in 1 day in Lake Forest near the lake.

Our Services

Residential and Commercial HVAC Repairs, Installations, and Replacements

Art Fortt working on the custom sheet metal transition piece that is needed for the supply and return side of the rooftop package unit that was craned onto the roof. Same day service. Affordable. Mission Viejo, Lake Forest, Orange, Laguna Hills, etc

Residential and Commercial HVAC Maintenance Plans

We provide hvac services in Orange County California and can provide air filters to laguna hills, mission viejo, lake forest, and the rest of orange county!

Smart Thermostat Installations

We can install any WiFi or digital thermostat that you want. Our top seller is the Venstar ColorTouch. We are happy to install Nest, Sensi, or any other smart thermostat that you desire.

About
Our Company

With over 40 years of experience we proudly serve all of South Orange County with our residential and commercial HVAC services. We provide the best heating and cooling troubleshooting in Orange County.

  • Areas we service (and more!): Aliso Viejo, Costa Mesa, Coto De Caza, Dana Point, Dove Canyon, Foothill Ranch, Irvine, Ladera Ranch, Laguna Beach, Laguna Hills, Laguna Niguel, Laguna Woods, Lake Forest, Mission Viejo, Newport Beach, Orange, Orange County, Portola Hills, Rancho Santa Margarita, San Clemente, San Juan Capistrano, Santa Ana, Southern California, South Orange County, Tustin, Villa Park Core service area — closest to Mission Viejo and our first priority: Mission Viejo, Lake Forest, Laguna Hills, Laguna Niguel, Ladera Ranch, Rancho Santa Margarita, Foothill Ranch, Aliso Viejo, San Juan Capistrano, Irvine, and Dana Point, plus nearby South Orange County including Laguna Beach, Costa Mesa, Newport Beach, Orange, Tustin, and San Clemente. Extended Southern California: larger commercial and replacement jobs in existing buildings. Please note: we do not do new construction. Call (949) 201-0491.

Art Fortt with Fortt Mechanical guiding the crane operator. Installing a 5-ton, 10-ton- 4-ton, 3-ton heat pump or gas pack for your business.

Contact Us

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We are always transparent and will provide you with heating or cooling repair cost estimates upfront! Prefer to talk? Call (949) 201-0491. We serve residential, light commercial, and property management customers in South Orange County. Please note: we do not do new construction — our replacements and installations are for existing homes and buildings.

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