Canyon Country Local

HVAC Contractor in Los Angeles, CA

Full-service AC, heating, and air quality work for Los Angeles homeowners. Call (888) 960-6003.

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HVAC Service Los Angeles Homeowners Can Rely On

Stay Cool Air Conditioning and Heating is a licensed HVAC contractor serving Los Angeles, CA, handling everything from air conditioner repair and furnace replacement to duct work and indoor air quality solutions. Owner David Michael Medina holds CA license #1036487, so when you call (888) 960-6003, you're getting someone who actually knows these systems, not a dispatcher rolling the dice on who shows up.

Los Angeles homes present a specific set of HVAC challenges. Much of the city's housing stock was built before central air conditioning was standard, which means older duct systems (or none at all) and equipment that's been patched and retrofitted over decades. The Los Angeles Department of Building and Safety (LADBS) requires a mechanical permit for HVAC installation, replacement, or any significant alteration, and nearly all new and replacement systems in the city require Home Energy Rating System (HERS) testing for third-party verification of duct leakage and refrigerant charge. We handle the work to code, no shortcuts.

What HVAC Service in Los Angeles Covers

AC repair, maintenance, and full replacement for single-family and multi-unit homes
Furnace repair and installation, including high-efficiency upgrades
Ductless mini-split systems for garages, additions, and homes without existing ductwork
Indoor air quality assessment and whole-house treatment systems
Duct repair, sealing, and replacement to pass HERS testing requirements
Dryer vent cleaning for fire safety compliance
All work permitted through LADBS where required by code

HVAC refrigerant manifold gauges and brass service fittings with colored hoses on a work surface.

Services

HVAC Problems We Fix in Los Angeles

From a system that won't cool to ducts that haven't been touched in 20 years, here's what we handle.

Air Conditioner Repair

If your AC is running but not cooling, cycling on and off too fast, or just quit outright, we diagnose the actual cause rather than throwing parts at it. Failing capacitors, refrigerant issues, clogged coils, we find the problem and fix it the same visit when parts allow.

Refrigerant manifold gauge set with colored hoses and pressure gauges held by an HVAC technician wearing work gloves and a tool belt.

Furnace Service

LA winters are mild, but furnaces still fail, often because they've sat idle for eight months and haven't been serviced. We repair and replace furnaces, and we're straightforward about when a repair makes more sense than a full replacement.

Mini Split Installation

Older Los Angeles homes without existing duct infrastructure are a perfect match for ductless mini-split systems. We handle full ductless installation for single zones and multi-zone setups, garages, back rooms, converted spaces.

Indoor Air Quality

LA air carries more than just smog. Inside an older home, dust, allergens, and stale air circulate through the same ducts for years. We offer whole-house air treatment systems and high-efficiency air cleaners that go well beyond a standard filter swap.

Duct Repair and Replacement

Leaky ducts waste conditioned air and drive up utility bills. LADWP rebates may apply when you upgrade to a more efficient system, but you won't capture those savings through ducts that are losing 20% of airflow through gaps and disconnected sections.

Dryer Vent Cleaning

Clogged dryer vents are a fire hazard, plain and simple. Our dryer vent service clears lint buildup and checks the full vent path so your dryer exhausts safely to the outside.

Local Knowledge

Older Housing Stock Means Different HVAC Demands

The Eastside of Los Angeles includes neighborhoods that go back to the 1870s, and much of the city's housing reflects decades of additions, renovations, and retrofits. That history shows up in HVAC systems. You'll find ducts routed through unconventional spaces, mixed equipment generations on the same system, and plenty of homes where the original builder never planned for central air at all. Mini-split systems are often the most practical solution here, no major duct work, zoned control, and efficient operation year-round. When duct systems do exist, we check them carefully. HERS testing is mandatory for most replacements in Los Angeles, so the duct leakage rate isn't just a comfort issue, it's a compliance issue. We've done this kind of work and we know what LADBS inspectors look for.

HVAC manifold gauges and refrigerant hoses held by a technician during a service call at a residential property.

How We Work

What you get when you call Stay Cool for HVAC service in Los Angeles.

Licensed in California, #1036487: C-20 Warm-Air Heating, Ventilating and Air-Conditioning contractor license, verifiable with the CSLB.
Owner on the job: David Medina has more than 25 years of HVAC experience. You're not getting a subcontractor.
Permitted work, by the book: We pull mechanical permits through LADBS where the job requires it. No shortcuts that come back to haunt you at resale.
HERS-compliant installations: New and replacement systems in LA require third-party verification. We build the job so it passes.

HVAC Questions from Los Angeles Homeowners

What permits are required for HVAC work in Los Angeles?

The Los Angeles Department of Building and Safety (LADBS) requires a mechanical permit for installation, replacement, or significant alteration of heating and air conditioning equipment in the incorporated City of Los Angeles. Beyond the permit itself, most new and replacement HVAC systems in LA also require HERS testing, a third-party inspection that verifies duct leakage and refrigerant charge levels meet California energy code. We handle jobs with these requirements in mind from the start.

Does LADWP offer rebates for new AC or heat pump systems in Los Angeles?

Yes. The Los Angeles Department of Water and Power (LADWP) offers residential rebates for qualifying heat pump and central AC equipment. The specific rebate amounts and eligibility requirements change periodically, so we recommend checking directly with LADWP for the current figures. What we can tell you is that efficient equipment replacements are where most of those savings get captured.

What's the difference between a heat pump and a furnace for a Los Angeles home?

In LA's mild climate, a heat pump handles both heating and cooling using refrigerant, which makes it highly efficient for the relatively short, moderate winters the city sees. A furnace burns gas to generate heat, which is effective but typically costs more to operate for the light heating load most LA homes actually need. If you're replacing a system and your winters don't get brutal, a heat pump is worth a serious look, especially with current LADWP rebates available on qualifying equipment.

How do ductless mini-split systems work for Los Angeles homes?

A mini-split uses an outdoor compressor connected by refrigerant lines to one or more indoor air handlers, no duct work required. For older Los Angeles homes that were never built with central air, or for additions and garage conversions where running new ducts isn't practical, a mini-split is often the cleanest and most efficient solution. We size and install both single-zone and multi-zone systems depending on how many rooms or areas you need to control independently.

When should I replace my AC instead of repairing it again in Los Angeles?

A system that's 12 to 15 years old and needs a major repair, compressor, refrigerant leak, or heat exchanger, is usually a replacement conversation rather than a repair one. The longer your AC runs in Los Angeles, the more it accumulates deferred wear from the extended cooling season. We'll give you an honest read on whether the repair cost makes sense relative to the remaining life of the equipment. We won't push a replacement when a repair is the right call.

What's the average lifespan of an HVAC system in Los Angeles?

Most central AC systems last 12 to 15 years with regular maintenance. In Los Angeles, the extended cooling season means your compressor runs more hours per year than in a cooler climate, which can push systems toward the lower end of that range if maintenance has been skipped. Furnaces typically last longer, 15 to 20 years, because they're used far less in LA's mild winters. Annual HVAC maintenance is the single biggest factor in whether a system reaches its full lifespan.

Is HVAC work in high demand in California right now?

It is. California's grid transition, Title 24 energy standards, and growing adoption of heat pumps are all driving replacement and upgrade activity statewide. In Los Angeles specifically, aging housing stock and years of deferred maintenance mean there's consistent demand for repair and replacement work. Getting your system assessed now, before it fails during peak summer heat, is smarter than competing for a service slot in August.

Los Angeles Neighborhoods We Serve

We travel to Los Angeles from our Canyon Country base, covering neighborhoods across the city and nearby communities throughout the San Fernando Valley corridor and beyond.

Ready to Schedule HVAC Service in Los Angeles?

Call (888) 960-6003 or use the form below to book service. David Medina, CA license #1036487, handles the work personally.

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★★★★★

The owner David came over and installed the air conditioning and furnace in record time, 4 hours. This was during a heat wave. He and his crew were professional and courteous. They are a great family run business 😊.

Denise S., Google review