
Discover Our Services & HVAC Terms
Service Info
#1 Rated HVAC Service
- Expert technicians
- Satisfaction Guaranteed
- Hassle-free customer service
- Licenced, bonded & insured



AOL Heating & Air Service Info
AOL Heating & Air Service Info
HVAC (heating, ventilation and air conditioning) define all the Heating, ventilation and air conditioning service provided.
Limited Basic terms within the industry:
- CFM - cubic feet per minute, volume of air coming in a system.
- BTU – British Thermal Unit. The number of kilocalories needed to increase the temperature of 1 pound of water by one degree Fahrenheit.
- SEER - is a short name of Seasonal Energy Efficiency Rating. It is the most widely applied indicator of the efficiency of the consumer central air conditioning systems. (Energy Efficiency Rating or more popularly known as (EER) is the most used to measure efficiency of commercial air conditioning systems.)
20+ Years of Comfort, Professionally You Can Count on
With 20 years of experience serving homeowners across California, we have built a strong reputation for reliable and professional HVAC solutions. Our team is committed to providing quality service, honest workmanship, and dependable comfort for homes and businesses throughout the area.
Reviews
What Our Customers Say
EXCELLENT Based on 32 reviews Posted on Google Andy SeropianTrustindex verifies that the original source of the review is Google. I called them to repair my heater, they responded in 2 hours. The same day they came and fixed it. Avi was a very knowledgeable and price was reasonable. I will definitely recommend him to my family and friends! 10 Stars!Posted on Google Tim RosensteinTrustindex verifies that the original source of the review is Google. Hired AOL to replace our old condenser and gas furnace with a new heat pump and air handler. Their quote was very competitive and though we ended up having to go with a more expensive unit due to size constraints and other reasons the total was still very reasonable. They did a great job and were responsive whenever we needed to get in touch. Can recommend.Posted on Google Roxana ZybleTrustindex verifies that the original source of the review is Google. Jose was professional and polite. He fixed the issue and answered my questions.Posted on Google Kyle BreslowTrustindex verifies that the original source of the review is Google. Excellent. Great guys. Fixed a ton of issues we had. Cleaned the hvac ducts. Did a great job. Outstanding. Love dean he’s greatPosted on Google N NTrustindex verifies that the original source of the review is Google. Good jobPosted on Google Jodee TochiTrustindex verifies that the original source of the review is Google. We had an awesome experience with Avi, he was honest and reliable...We'll be using him everytime we need work...

Heating
These days forced air systems are more widely used in the industry because of the following reasons:
- Increased Air conditioning effects.
Energy savings for Up to 15-20% - Even Conditioning
Ventilation
Adopts heat recovery ventilation systems which use heat exchangers to recover sensible heat in exhaust air, this is through the transfer of energy to the fresh air outdoors which is approaching.
AC Repair & Installation
Enabling Vapor Compression Refrigeration processes that generate cold air temperature with the help of heating pump to transport hot air rather than transform temperatures. EER (Energy Efficiency Ratio) is a performance measure which is used less frequently compared to SEER (Seasonal Efficiency Ratio).
SERVICES
Maintenance Services

Summer Maintenance

Winter Maintenance

Filter Replacement

System Diagnostics





Why Choose AOL?
Getting It Right Is on Us
We are convinced in performing the job correctly the first time. We have highly trained technicians who make sure that there are precise installations, repairing, and maintaining it--you never need to bother with the same problem. We care about your comfort and peace.
We Fix Others’ Mistakes
In case you had a poor experience with regarding HVAC, we are ready to rectify that. Our specialists deal with the diagnosis and correction of faulty installations and repair HVAC services that help your system operate efficiently and reliably.
We’re Homeowners Too
We know the value of a cozy, effective, and comfortable house. This is the reason why we make all the homes our own giving a candid advice, reasonable rates, and the best in HVAC solutions.
Reviews
What Our Customers Say
EXCELLENT Based on 210 reviews Posted on Yelp Jeff R.Verified Called AOL on NY Eve for my Dad's house in Granada Hills (I live out of town) ...he's elderly and his Caregivers told me the Heater comes on but the house isn't getting warm. Lisa answered the phone and checked the schedule to see if they could come out the same day....within 30 mins she told me Joseph can stop by...he then called me and told me what he needed to to, he did have to go back to his shop to get a part he returned to install it and replace some old wiring. He tested everything out and within 3 hours from my first call the house was warming up again. We found the cost to be reasonable and are quite happy with the service. I would use them again and can recommend AOL too. THANK YOU!Posted on Yelp Josh B.Verified Highly recommended. 3rd company that I worked with and by far the best. Dean was on time, communicative, walked through the issues ahead of any servicing. Identified a critical CO2 leak issue that was unrelated to what I called about. Will definitely lean on them for any future HVAC needs.Posted on Yelp Jonathan A.Verified I called AOL on a Saturday afternoon, when my AC failed during this record heatwave. After some initial troubleshooting over the phone, Avi & Jose arrived the following morning and completed the repairs in 2 hours, despite some challenges. My AC compressor is a high-efficiency unit with some complex electronic circuitry. Avi & Jose have particular knowledge & experience with these models, fortunately. I appreciated their professionalism, availability, and quick response!Posted on Yelp Glenn B.Verified Promp, knowleagable, neat and courteous. Avi and his crew were terrific. I had a lot of choices... I'm so glad I chose AOL Heating & Air. They will be my go-to for my service needs. Highly recommended!Posted on Yelp Reed M.Verified Avi responded promptly to our call and came to our house the same day. He explained the quick fix and its disadvantages given the short useful life of our system( which I had previously researched and which was confirmed by multiple problems we had in the 7 years we owned this house). He gave us a very fair price for replacing the system without any hard sell, which we chose to do. The team came the next morning and had the old system out and the new one installed in 6 hours. They were professional, polite, clean and quiet. Avi came by mid-day and two days later to check the completed work (the intervening day was a religious holiday). Altogether a 5 star experience.Posted on Yelp Sally N.Verified Avi is the man!!!! He is a super nice person and knows his stuffs. Our Condenser went down and I cannot afford to replace a new system. He found me a way to get a new condenser and coil with very very cheap price. We never met before and this is our 2nd time doing business with him. He treats his customer as a friend rather than as a contractor. We are so lucky to find a reliable hvac contractor and he is a man of his word!!Posted on Yelp Darren W.Verified AC stopped blowing cold air on Saturday of a major heat wave. They came out by early Sunday morning and fixed the system in 30 minutes. Super responsive and saved the day! They were responding to every AC emergency on Sunday when other companies said they couldn't come out until later in the week. If there were 10 stars I would give it to them. Thank you AOL!!!Posted on Yelp Melanie T.Verified Avi is the best. Great prompt service. Highly recommend. We were totally without AC and he he fixed our problem.Posted on Yelp Yadi S.Verified I was told during my last AC maintenance that our system was very dirty and needed a deep cleaning so that our system could operate efficiently. They provided a quote... and I was stunned at the price AND how many components needed cleaning! Decided to check Yelp for reviews and AOL stood out. Reached out to AOL and Joseph came out at the end of day to review our needs. I decided to hire them and couldn't be more pleased. They arrived on time, Jose greeted me upon arrival. Both Jose and Carlos were very professional and answered my questions during the service. I highly recommend AOL and plan on using their services in the future.Posted on Yelp Peter S.Verified AOL installed 2 new mini-split systems. The old ones were installed incorrectly, and they explained why and provided a few options on new systems and installations. Very good communication and service!
Frequently Asked Questions
What types of HVAC services does AOL Heating & Air Inc. offer?
AOL Heating & Air Inc. is a full‑service HVAC contractor. We handle everything from residential and commercial installation and repair to routine maintenance and emergency support. Our expertise covers:
– Air Conditioning (units, ductwork, and thermostats)
– Commercial HVAC (large‑scale systems for offices, retail spaces, and warehouses)
– Heater Repair & Replacement (furnaces, boilers, heat pumps)
– Diagnostic & Tune‑Up Services (pre‑seasonal checks, filter changes, system diagnostics)
– Seasonal Maintenance (summer & winter checks to keep your system running smoothly)
– 24/7 Emergency Repairs – because a broken HVAC never waits for business hours.
How do I schedule a service?
Simply give us a call or fill out the online contact form on our website. Our technicians will:
1. Schedule a convenient time usually within 48 hours for most services.
2. Perform a complimentary on‑site diagnostic (if needed) to assess the problem and give an accurate estimate.
3. Provide a detailed, written estimate with cost breakdowns and suggested solutions no surprises later.
Whether you need a quick filter change or a full HVAC installation, Call us at (818)450-5807 to help you stay comfortable and energy‑efficient.
How often should I replace my AC filter?
Filters trap dust, pollen, and contaminants that can clog the system, lower efficiency, and degrade indoor air quality. We recommend checking and replacing your filter every 1–3 months—more often if you have pets, allergies, or a high‑vacuum environment. Our professional filter replacement service ensures:
– Correct filter size and type for your unit
– Clean, leak‑free installation
– A quick check of airflow and system pressure for optimal performance
What is the difference between a summer/ winter maintenance service and a winter maintenance?
Each season presents unique demands on HVAC equipment:
- Season
- Focus
- Key Tasks
- Summer
- Cooling
- Inspect evaporator coils, check refrigerant levels, clean condenser fan, test thermostats
Skipping either can lead to reduced efficiency, higher energy bills, or costly breakdowns. Our seasonal maintenance keeps your system running at peak performance all year round.
I’m experiencing a strange noise from my HVAC unit, should I call an emergency technician?
If you hear:
– A rattling or grinding sound while the system is running,
– A sudden pop or burst of pressure, or
– Any noise that sounds like the unit is struggling or “talking,”
… it’s safest to call our 24/7 Emergency HVAC Services. Prompt attention can prevent a minor issue from turning into a major, costly repair—and keep you comfortable during extreme weather.