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Avatar for Global Green Solutions
Global Green Solutions
5.0(
248
)
Central A/C - InstallCentral A/C - Install - For BusinessCentral A/C - Service or Repair+2 more

Serving Monrovia, CA and surrounding areas

Approved

In business since 2005

Free estimates

Emergency services offered

"Excellent service from start to finish! They quickly diagnosed the issue with our AC and had it running again in no time. The technician was friendly, knowledgeable, and explained everything clearly. Highly recommend for any heating or cooling repair!"
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+24

10 neighbors recently requested a quote
Recommended by7%of homeowners
Avatar for Air-Tech Air Conditioning & Heating Inc
Air-Tech Air Conditioning & Heating Inc
4.5(
202
)
Central A/C - InstallAir Ducts & Vents - CleanCentral A/C - Install - For Business+4 more

Serving Monrovia, CA and surrounding areas

Approved

In business since 1988

Free estimates

Warranties offered

"So many GREAT things to say about Air-Tech. First, I had a split system installed on one side of a duplex about 10 years ago. It was permitted and passed. Less than a year later I learned there were leaks/problems with it. The original installer wouldn't come back as they no longer worked in this geographical area and the European units weren't being used. Thank God they recommended Air-Tech! They fixed the system and offered an annual maintenance check where they come out every 6 months and check for leaks, clean filters, etc. Their office is so wonderful about reminding me if I have forgotten to set up an appointment. Their guys are ALWAYS professional, clean and courteous. Well, two months ago the tenants in the other side of the duplex requested AC and I knew Air-Tech would be great. I called Alex out (what a super nice guy) and he came over the next day I think. I remember it was a Saturday. Since the price of these system had gone up substantially from when I bought it ten years I was shocked. I signed the contract and gave him a deposit but after talking to BF he suggested I get other bids for something that expensive. I called Alex and asked him to put my project on hold for a week while I looked at bids. I think he was surprised because I knew them and the system but I felt like I needed to be prudent. He wasn't rude or short. He was very respectful. The other company's estimators were pleasant enough and I learned about some options for a second gas heating system that I wanted installed at another location. The other company's prices were similar. One added a city inspection which I was doing as an added cost ot Air-Tech's price and the other company added five years of maintenance onto their price. So the prices were a bit higher. I knew I'd be purchasing the maintenance services from Air-Tech so I knew how that compared. I called Alex back about a week later and said: "Let's go. Thank you for the time to check around and feel confident. Armando and Andrew have installed the systems this week and I could NOT BE HAPPIER. I am amazed that Armando knows so much about electrical, gas and mechanical systems. Andrew is very helpful and knowledgeable and quick to make sure things are clean. Every time someone has come out from Air-Tech they are nice, neat, respectful and focused on their work. They aren't taking calls on their phone, they aren't talking excessively, etc. ANYWAY, as part of the installation for the gas wall heater they discovered that there are two gas leaks under the raised property. Someone had installed temporary shut off valves for two previously serviced gas units (a floor furnace and radiator we think). Yikes! Air-Tech was supposed to be done with ALL the work yesterday and while it's not as convenient to be at the property another day I am so thankful that they found the leak and are fixing them without charging me any money! How can they do that? I think it's because they know I'm a loyal customer. I'll be purchasing the maintenance contracts. Thank you Alex, Armando and Andrew. So happy to be working with you!"
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+8

48 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for Air Duct Professionals
Air Duct Professionals
4.7(
1,517
)
Air Ducts & Vents - Clean

Serving Monrovia, CA and surrounding areas

Approved

In business since 1990

Free estimates

Warranties offered

"great!!! second time using Air Duct Professionals - Casey arrived promptly, called in advance. Explained everything he was doing, was courteous and professional. Will definitely use this place again and again."
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+11

1 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for RS Air Conditioning & Heating
RS Air Conditioning & Heating
4.9(
23
)
Central A/C - Service or Repair

Serving Monrovia, CA and surrounding areas

Approved

In business since 1990

Free estimates

Emergency services offered

"Ray was very responsive and professional since my first contact with him. He came out early the next day to diagnose my broken AC and walked me through the testing stages and explained what he was doing, how it works, and why. He tried several methods to get the system up and running but ultimately, we had to replace the old unit. Since we were in a 100 degree heatwave, Ray was mindful of our situation and came early the next day to install the new unit within an hour. Very fortunate to have a seasoned professional like Ray to help us amidst the heat and Covid. I would highly recommend him to anyone looking for central AC work."
New Outdoor Install
Furnace Install
Satisfied Client
Energy saver!
Carrier Water Soure

+2

Response time3 hrs
Response rate100%
Recommended by100%of homeowners
Avatar for All City Plumbing, Air & Electrical
All City Plumbing, Air & Electrical
4.9(
270
)
Central A/C - InstallCentral A/C - Service or Repair

Serving Monrovia, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2009

Emergency services offered

Warranties offered

"I had a gas valve and water valves that were woefully old and needed replacing. I read the reviews for All City and was impressed so I gave them a call. From the beginning, the experience was fantastic. Jasmine answered my call and was pleasant, informative, and answered all of my questions. She was able to get someone out to my house in a day! The day of service I received a text from my tech, Ruben, letting me know he was on his way, and he was early at that! I can’t say enough great things about Ruben. He is friendly, professional, knowledgeable, and just an all around cool dude! He had my gas valve fixed within 15 minutes, which is no small task. The valve and piping are over 50 years old. I was impressed with how quickly and thoroughly the job was done. He had to come back the next day to replace the water valves so we made an appointment for the next morning. Let me first say, I am an early riser. I jokingly told Ruben this the prior day when asked what time he could arrive the next day, we set the appointment for 9am (I’m already up for 3 hours normally). At 7am I get a text that he is on his way, Ruben followed this up with a phone call making sure it was ok to come that early. OF COURSE! Again, he showed up smiling and ready to go. Despite the challenges of the ancient pipes he had the job done in no time. He was also kind enough to provide new hoses for the washing machine. Additionally, he actually made a run to the hardware store to get a longer gas hose to accommodate where I intended to position my stacked washer/dryer! Let me emphasize again, I cannot say enough great things about Ruben and the service I received. He went above and beyond any expectations and was able to get a job done that I thought near impossible. People like him are rare these days and not only does his personal work ethic shine through, but by proxy he makes All City a cut above and beyond all plumbing companies. I will defiantly be using them, and requesting Ruben, for all of my plumbing needs moving forward."
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+42

14 neighbors recently requested a quote
Recommended by97%of homeowners
Avatar for Temp Air System, Inc.
Temp Air System, Inc.
4.8(
54
)
Central A/C - InstallCentral A/C - Service or RepairDuctless Mini-split A/C - Install or Replace

Serving Monrovia, CA and surrounding areas

Approved

In business since 2002

Free estimates

Credit card accepted

"We had Temp Air install our AC unit. The best decision we ever made. They were fast, reliable and dependable. Excellent customer service, did a phenomenal job. After a couple of years something was going on with our unit, I called them and immediately they send out a technician Juan, who was phenomenal. He explained what the issue was and resolved it asap! Highly recommend this company!"
Mini Split Installation
Mini Split Installation
Mini Split Installation
Mini Split Installation
Mini Split Installation

+14

Response time10 hrs
Response rate99%
7 neighbors recently requested a quote
Avatar for Penguin Heating and Air Inc
Penguin Heating and Air Inc
5.0(
15
)
Central A/C - InstallCentral A/C - Service or RepairCentral A/C - Install - For Business+1 more

Serving Monrovia, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2025

Free estimates

Emergency services offered

"I highly recommend this company. Penguin heating & Air was very quick to respond to my request, fast text reply, sent them pics, they replied with a quote, which was way lower than anyone else on this site, or even our regular guy that we normally use, we scheduled an appointment for the very next day, which was today, he also finished the job the same day! David did a very good job, very professional. Despite a terrible rainy day, he got the job done. When he was done he walked me through with exactly what he did. He also quoted me for a service on an existing unit and his quote was almost $200 less than what our regular guy charges us... We will absolutely be using this company again."
Diamond Bar
Diamond Bar
Diamond Bar
Furnace Install
AC Condenser

+6

27 neighbors recently requested a quote
Recommended by6%of homeowners
Avatar for Top Energy Solutions, Inc.
Top Energy Solutions, Inc.
4.9(
62
)
Central A/C - InstallDuctless Mini-split A/C - Install or ReplaceCentral A/C - Install - For Business

Serving Monrovia, CA and surrounding areas

Approved

In business since 2019

Free estimates

Warranties offered

"I highly recommend Top Energy Solutions. During the heat wave my air conditioning system blew out hot air. I expected to wait days for a technician to come out. Leor sent one the next morning. The technician quickly located the problem and fixed it within minutes. Their employees are professional, courteous and very knowledgeable."
Roof Replacement  - Owens Corning Shingle Roof
New Windows Installation in Hollywood
5 Ton Furnace Replacement
Attic insulation
New Mini Split - Daikin Emura

+87

Response time1 day
Response rate98%
6 neighbors recently requested a quote
Avatar for Trinity Heating and AC
Trinity Heating and AC
5.0(
40
)
Central A/C - Service or Repair

Serving Monrovia, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2021

Free estimates

Warranties offered

"I called on a Sunday morning. I purchased a new Ecobee smart thermostat and had trouble wiring it. I really was hoping to get it done immediately, but I was a little apprehensive about if that was possible and also if it would be very expensive. Chris’s called me almost immediately after I posted my request. He came out literally within about an hour. He was really knowledgeable, courteous, and efficient. The cost was very fair. I can’t imagine anything going better. I absolutely recommend."
Furnace Before
AC After
Furnace After
AC Before
Before - Furnace

+83

Response time2 hrs
42 neighbors recently requested a quote
Recommended by30%of homeowners
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Air Conditioning questions, answered by experts

You can buy a house with a 15-year-old HVAC system if you inspect the system for performance and budget for a replacement within the next three years. You can also negotiate the price with the sellers. Ask to look at the unit’s maintenance records and energy bills for the last two years to determine the shape of the HVAC system and its operating costs. Spend time in each room of the house to gauge if the HVAC keeps the home at a consistent temperature throughout.

Setting your AC unit to 78 degrees can, indeed, help you save energy. In fact, according to experts, every degree you turn the unit up could save you between 1% and 3% on your energy bills. That said, turning your unit off entirely while you’re out might actually be less efficient than keeping it on at a higher temperature. Why? The unit will need to work extra hard to cool the house back off again after all those hot hours. 

No. Your furnace does not run your air conditioner. Both units use the same system of ductwork to move conditioned air throughout your home, but you can have a furnace without having an air conditioner and vice versa. Furnaces are only for heating your home. You can buy a system that does both, however, like a split system or a heat pump (yes, heat pumps cool, too).

The standard HVAC warranty is around five years. Still, many brands offer an extension to 10 years if you register the product within a specific timeframe, typically 60 to 90 days post-purchase or HVAC installation. Over the past decade, warranty periods have substantially increased, shifting from 3-5 years in the 90s to the now-prevalent 10+ year warranties. Both warranty types cover parts failing due to manufacturer defects, incurring no additional costs. Some manufacturers provide extended warranties surpassing the usual 15- to 20-year window, though these often involve extra fees. 

If you’re trying to buy a new AC unit, there are a few crucial factors to consider. Look at the cooling capacity, the available warranty, the energy efficiency, and the type of unit. A ductless unit will cost more up front but may be a more viable option if you don’t already have ductwork. Additionally, a unit with better energy efficiency will cost less to run overall, saving you money on your monthly energy bill. 

The Monrovia, CA homeowners’ guide to air conditioning services

From average costs to expert advice, get all the answers you need to get your job done.