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TRUSTED BY SIMI VALLEY, CA HOMEOWNERS

  • Average homeowner rating star icon4.7
    Average homeowner rating
  • Verified reviews icon402
    Verified heating and air conditioning services reviews

Find Heating and air conditioning pros in Simi Valley

Avatar for Global Green Solutions

Global Green Solutions

5.00(
111
)
Approved Pro

Global Green Solutions

5.00(
111
)
Approved Pro
Customers say: Quick response
20 years of experience
Free onsite estimate

Whether you need an A/C or Heater installation or repair in Los Angeles, our team of HVAC pros is here to deliver outstanding service. We're passionate about delivering an exceptional heating and air conditioning experience. When you hire us, you're hiring a team of professionals who are trained and skilled to deliver lasting value to your home. We're committed to serving you with quality and great value. We'll come to you, listen to your needs, and then come back to you with a logical, feasible plan that works for you. Our first-time customers continually become our long-term customers time and time again, choosing us for all the heating, AC, air ducts needs. Contact us today and see what our commitment to quality is all about! We may not be related, but you'll feel like we're family. We Service Los Angeles and surrounding areas. Call us today for a free estimate!

"Excellent heating and air conditioning repair, replacement, and new installation services! Everything went smoothly and without incident from beginning to end. Before departing, they made sure the system was operating flawlessly, responded quickly, and worked effectively. Excellent service?I heartily recommend them!"

James on December 2025

Whether you need an A/C or Heater installation or repair in Los Angeles, our team of HVAC pros is here to deliver outstanding service. We're passionate about delivering an exceptional heating and air conditioning experience. When you hire us, you're hiring a team of professionals who are trained and skilled to deliver lasting value to your home. We're committed to serving you with quality and great value. We'll come to you, listen to your needs, and then come back to you with a logical, feasible plan that works for you. Our first-time customers continually become our long-term customers time and time again, choosing us for all the heating, AC, air ducts needs. Contact us today and see what our commitment to quality is all about! We may not be related, but you'll feel like we're family. We Service Los Angeles and surrounding areas. Call us today for a free estimate!

"Excellent heating and air conditioning repair, replacement, and new installation services! Everything went smoothly and without incident from beginning to end. Before departing, they made sure the system was operating flawlessly, responded quickly, and worked effectively. Excellent service?I heartily recommend them!"

James on December 2025


Avatar for Highland Air LLC

Highland Air LLC

4.97(
97
)
Approved Pro

Highland Air LLC

4.97(
97
)
Approved Pro
Super Service Award
Customers say: True professional
4 years of experience
Free onsite estimate

Highland Air is a family-owned HVAC company serving Oak Park, Conejo Valley, and surrounding areas. Every job is performed or supervised directly by the owner—no salespeople, no upsells, and no unnecessary repairs. We specialize in fast diagnostics, same-day service, fair and transparent pricing, and high-quality workmanship. Customers consistently praise our responsiveness, honesty, and attention to detail. Whether you need a repair, system tune-up, heat pump upgrade, or smart thermostat installation, we provide reliable solutions designed to last. Free estimates • Same-day availability • Full HVAC, ductwork, smart control & air quality services.

"ABSOLUTELY PAINLESS AND VERY FAIR PARTS & LABOR PRICING"

DAVID B on October 2025

Highland Air is a family-owned HVAC company serving Oak Park, Conejo Valley, and surrounding areas. Every job is performed or supervised directly by the owner—no salespeople, no upsells, and no unnecessary repairs. We specialize in fast diagnostics, same-day service, fair and transparent pricing, and high-quality workmanship. Customers consistently praise our responsiveness, honesty, and attention to detail. Whether you need a repair, system tune-up, heat pump upgrade, or smart thermostat installation, we provide reliable solutions designed to last. Free estimates • Same-day availability • Full HVAC, ductwork, smart control & air quality services.

"ABSOLUTELY PAINLESS AND VERY FAIR PARTS & LABOR PRICING"

DAVID B on October 2025


Efficiency Air, Inc.

4.94(
292
)
Approved Pro

Efficiency Air, Inc.

4.94(
292
)
Approved Pro
Super Service Award
Customers say: True professional
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
40 years of experience

Efficiency Air, Inc., has specialized in providing a variety of HVAC services to our local residents of Los Angeles and Ventura Counties, for over 25 years. Our customers' satisfaction is what determines our success, which is why our company continues to focus on the principles of quality workmanship, timely completion, competitive pricing and integrity in all business dealings. We combine knowledge and research with extensive practical experience to ensure the correct approach to your property. Thank you for your interest.

"After getting inspections and estimates from several contractors I picked Effincincy Air Inc. To perform the job. DEAN and his team were amazing .During inspection Dean was extra through in his investigation and assessment of the property, the current AC system and all aspects to watch for. They also came up with a competitive price. Installment of the new unit went smoothly, and they were very careful with my unit. I am very happy with this company and I recommend it sincerely. Petra W. -condo - Encino CA"

Petra W on June 2025

Efficiency Air, Inc., has specialized in providing a variety of HVAC services to our local residents of Los Angeles and Ventura Counties, for over 25 years. Our customers' satisfaction is what determines our success, which is why our company continues to focus on the principles of quality workmanship, timely completion, competitive pricing and integrity in all business dealings. We combine knowledge and research with extensive practical experience to ensure the correct approach to your property. Thank you for your interest.

"After getting inspections and estimates from several contractors I picked Effincincy Air Inc. To perform the job. DEAN and his team were amazing .During inspection Dean was extra through in his investigation and assessment of the property, the current AC system and all aspects to watch for. They also came up with a competitive price. Installment of the new unit went smoothly, and they were very careful with my unit. I am very happy with this company and I recommend it sincerely. Petra W. -condo - Encino CA"

Petra W on June 2025


Avatar for AC Dave Heating & Air

AC Dave Heating & Air

4.94(
86
)
Approved Pro

AC Dave Heating & Air

4.94(
86
)
Approved Pro
Super Service Award
Customers say: Super punctual
Recommended by 98% of Angi customers
Recommended by 98% of HomeAdvisor customers
19 years of experience

AC Dave is a family owned & operated small business with 5 employees. We accept all major credit cards, checks & cash at the time services are rendered. $24.99 discount for first time customers and new maintenance agreement of one year or more. License Number: 877683, give us a call today!

"Thank you for everything. Leo is knowledgeable, friendly, and performs terrific work."

Robert C on September 2025

AC Dave is a family owned & operated small business with 5 employees. We accept all major credit cards, checks & cash at the time services are rendered. $24.99 discount for first time customers and new maintenance agreement of one year or more. License Number: 877683, give us a call today!

"Thank you for everything. Leo is knowledgeable, friendly, and performs terrific work."

Robert C on September 2025


Avatar for Top Energy Solutions, Inc.

Top Energy Solutions, Inc.

4.85(
23
)
Approved Pro

Top Energy Solutions, Inc.

4.85(
23
)
Approved Pro
Customers say: Quick response
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers
6 years of experience

When it comes to home upgrades, Top Energy Solutions is the market leader. We are a client-focused company that works hard to deliver the best possible results in all of our projects. We understand the importance of trusting a company to deliver your dream, so we strive to meet all of our customers’ expectations and make their dreams come true. We know your house is valuable, and we treat it like it was our own. Enjoy the benefits of lower costs, wide network, access to the best systems on the market, along with the comfort of a client-driven business that is still family-owned and operated. Our company is here to look after you. We will do our very best to fulfill all your HVAC, Insulation, Roofing, Windows, and Solar needs.

"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."

Terri T on September 2024

When it comes to home upgrades, Top Energy Solutions is the market leader. We are a client-focused company that works hard to deliver the best possible results in all of our projects. We understand the importance of trusting a company to deliver your dream, so we strive to meet all of our customers’ expectations and make their dreams come true. We know your house is valuable, and we treat it like it was our own. Enjoy the benefits of lower costs, wide network, access to the best systems on the market, along with the comfort of a client-driven business that is still family-owned and operated. Our company is here to look after you. We will do our very best to fulfill all your HVAC, Insulation, Roofing, Windows, and Solar needs.

"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."

Terri T on September 2024


Avatar for United Air Heating & Air Conditioning, Inc.

United Air Heating & Air Conditioning, Inc.

4.99(
40
)
Approved Pro

United Air Heating & Air Conditioning, Inc.

4.99(
40
)
Approved Pro
Super Service Award
Customers say: True professional
18 years of experience
Free onsite estimate

FINANCING IS NOW AVAILABLE FOR INSTALLATIONS AND SERVICE CALLS!! United Air Heating & Air Conditioning Inc is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.

"Victor and his guys were friendly, professional and knowledgable. They notified us theyThey were running a little late and we appreciated that communication. They explained each step when cleaning and repairing our air conditioner. "

Christi E on August 2025

FINANCING IS NOW AVAILABLE FOR INSTALLATIONS AND SERVICE CALLS!! United Air Heating & Air Conditioning Inc is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.

"Victor and his guys were friendly, professional and knowledgable. They notified us theyThey were running a little late and we appreciated that communication. They explained each step when cleaning and repairing our air conditioner. "

Christi E on August 2025


Avatar for Extreme Cooling & Heating, Inc.

Extreme Cooling & Heating, Inc.

4.92(
73
)
Approved Pro

Extreme Cooling & Heating, Inc.

4.92(
73
)
Approved Pro
Customers say: Quick response
Recommended by 98% of Angi customers
Recommended by 98% of HomeAdvisor customers
21 years of experience

Extreme Cooling & Heating is a company that takes pride in what we do. From greeting the customer to doing the job. Our team makes sure that they go Extreme for you and all of our future customers. Give us a call and we will show you why they choose us every time.

"Great service, and something I really value, great communication. When Victor got held up and was going to be a few minutes late, he called me immediately to let me know. I have a lot of experience with service people just being late and never letting you know. the job is done quickly, and efficiently, and was effective in fixing my problem. He was honest and projecting. There may be a problem with longevity of the fix, and again, I really appreciated that. Would absolutely hire again."

PAMELA H on June 2023

Extreme Cooling & Heating is a company that takes pride in what we do. From greeting the customer to doing the job. Our team makes sure that they go Extreme for you and all of our future customers. Give us a call and we will show you why they choose us every time.

"Great service, and something I really value, great communication. When Victor got held up and was going to be a few minutes late, he called me immediately to let me know. I have a lot of experience with service people just being late and never letting you know. the job is done quickly, and efficiently, and was effective in fixing my problem. He was honest and projecting. There may be a problem with longevity of the fix, and again, I really appreciated that. Would absolutely hire again."

PAMELA H on June 2023


Avatar for Just Be Cool Supply, LLC

Just Be Cool Supply, LLC

4.97(
29
)
Approved Pro

Just Be Cool Supply, LLC

4.97(
29
)
Approved Pro
Super Service Award
Customers say: Quick response
3 years of experience
Free onsite estimate

is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.

"evryhting went as agreed. thank you."

TY T on November 2025

is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.

"evryhting went as agreed. thank you."

TY T on November 2025


Avatar for DNA Heating & Cooling, Inc.

DNA Heating & Cooling, Inc.

4.85(
52
)
Approved Pro

DNA Heating & Cooling, Inc.

4.85(
52
)
Approved Pro
Customers say: True professional
9 years of experience
Free onsite estimate

With nearly 15 years in the Heating and Cooling industry, DNA Heating & Cooling, Inc., proudly serves its customers with pride, integrity and attention to the details that matter most to you. This is one of the many things that sets us apart from the rest. We are locally owned and operated. Give us a call today!

"Paid $1500 for drain job on our hvac system the previous folks of our place didnt do. Our ceiling was low so they had to make a makeshift drain. Overall the job was done and it works. Its not the best job, but it does work."

Albert C on August 2025

With nearly 15 years in the Heating and Cooling industry, DNA Heating & Cooling, Inc., proudly serves its customers with pride, integrity and attention to the details that matter most to you. This is one of the many things that sets us apart from the rest. We are locally owned and operated. Give us a call today!

"Paid $1500 for drain job on our hvac system the previous folks of our place didnt do. Our ceiling was low so they had to make a makeshift drain. Overall the job was done and it works. Its not the best job, but it does work."

Albert C on August 2025


Avatar for Southland Heating and Air Conditioning

Southland Heating and Air Conditioning

4.81(
144
)
Approved Pro

Southland Heating and Air Conditioning

4.81(
144
)
Approved Pro
Customers say: Super punctual
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers
28 years of experience

Choosing the right Heating and Air Conditioning Contractor is very important. Chances are you are going to make a substantial investment in your new HVAC system with which ever contractor you choose. There is nothing worse than investing a large amount of your hard earned money in a new system and winding up with a system that is noisy, inefficient, and does not perform properly. Or even worse, one that fails prematurely. Surprisingly enough most HVAC Contractors have no formal training. Untrained HVAC Contractors frequently do not size systems properly which could result in improper cooling, very high utility bills, and even systems that fail prematurely. Before you even consider a contractor make sure they are NATE Certified and Air Balance Certified. North American Technician Excellence is the Prestigious Certification of HVAC Competence. Using a NATE certified contractor is like using a surgeon that graduated Harvard Medical School with honors. Air Balance Certified contractors understand airflow which equates to efficiency and comfort in your home. To have a system designed properly a contractor has to understand air flow. At Southland we offer this high level of expertise. Yes, we are very good at what we do and there is no question about that. Our reviews and ratings prove that. Our installations are unparalleled with every system being designed specifically to the home. All options for a quality installation are included in every system we install. From basic systems, high efficiency systems, to specialized zoning we do it all. If you are searching for a knowledgeable contractor you have found one here. We offer extremely competitive pricing and expert design knowledge.

"Dave was very efficient and knowledgeable. He was able to supply my quote before he left. I look forward to working with Southland heating and air. Follow up: I made my decision and signed the contract. Best decision I could have made. They were thousands of dollars less for the exact same equipment than 3 other companies I got estimates from. When challenged none of the other companies could revise their estimate to even come close. Southland is a Mitsubishi diamond dealer so I got full Mitsubishi warranties plus 1 year from Southland of parts and service. The day the installers arrived, on time, it was raining. Jamie and Ricardo used the utmost care to protect my home. They covered the floors, moved and covered the furniture and made sure before they left that I fully understood how to use the remote and operate the equipment. I have attached a photo so you can see for yourself the way they carted for my home. The equipment works perfectly. I would hire this company again in a heart"

John G on November 2025

Choosing the right Heating and Air Conditioning Contractor is very important. Chances are you are going to make a substantial investment in your new HVAC system with which ever contractor you choose. There is nothing worse than investing a large amount of your hard earned money in a new system and winding up with a system that is noisy, inefficient, and does not perform properly. Or even worse, one that fails prematurely. Surprisingly enough most HVAC Contractors have no formal training. Untrained HVAC Contractors frequently do not size systems properly which could result in improper cooling, very high utility bills, and even systems that fail prematurely. Before you even consider a contractor make sure they are NATE Certified and Air Balance Certified. North American Technician Excellence is the Prestigious Certification of HVAC Competence. Using a NATE certified contractor is like using a surgeon that graduated Harvard Medical School with honors. Air Balance Certified contractors understand airflow which equates to efficiency and comfort in your home. To have a system designed properly a contractor has to understand air flow. At Southland we offer this high level of expertise. Yes, we are very good at what we do and there is no question about that. Our reviews and ratings prove that. Our installations are unparalleled with every system being designed specifically to the home. All options for a quality installation are included in every system we install. From basic systems, high efficiency systems, to specialized zoning we do it all. If you are searching for a knowledgeable contractor you have found one here. We offer extremely competitive pricing and expert design knowledge.

"Dave was very efficient and knowledgeable. He was able to supply my quote before he left. I look forward to working with Southland heating and air. Follow up: I made my decision and signed the contract. Best decision I could have made. They were thousands of dollars less for the exact same equipment than 3 other companies I got estimates from. When challenged none of the other companies could revise their estimate to even come close. Southland is a Mitsubishi diamond dealer so I got full Mitsubishi warranties plus 1 year from Southland of parts and service. The day the installers arrived, on time, it was raining. Jamie and Ricardo used the utmost care to protect my home. They covered the floors, moved and covered the furniture and made sure before they left that I fully understood how to use the remote and operate the equipment. I have attached a photo so you can see for yourself the way they carted for my home. The equipment works perfectly. I would hire this company again in a heart"

John G on November 2025

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Heating and Air Conditioning questions, answered by experts

Most HVAC service calls include diagnostic fees, which could include checking on a specific issue you’re experiencing or running through a routine inspection checklist. If you called for a particular problem, the service call will also include an estimate to fix the issue, including materials and labor. Depending on your HVAC technician and the service you requested, you might also get a general inspection of your system components to ensure everything is working as intended.

No, it's not advisable to only replace the outside AC unit connected to your system. AC units are designed to work as a cohesive system, and older units work differently than newer units. Therefore, replacing only one component can lead to incompatibilities that affect the system’s performance. Replacing one component can void your warranty, costing you money for repairs.

A non-maintained AC is more likely to perform poorly, increase your energy bills, and undergo more severe issues like breakage and water damage. That’s why DIY cleaning or professional maintenance is recommended annually. Otherwise, you might end up paying more in the end than you would for annual service. You can purchase cheap AC cleaning kits if you prefer going the DIY route.

The best way to reduce heat upstairs is to release it by opening a window. Hot air rises, and if you can create some airflow by opening a window upstairs and also one on a lower level, the hot air should be pushed out of the home. Remember that fans pointing out the window do a much better job of circulating air than fans pointing into the home.

Air conditioners and dehumidifiers are actually quite similar, though they perform different jobs. Dehumidifiers reduce moisture in the air, while air conditioners work to cool the home. A good central AC unit will naturally perform a certain level of dehumidification due to its design, but it will not be able to handle excessive levels of moisture.

The Simi Valley, CA homeowners’ guide to heating and air conditioning services

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