Top-rated heating and air conditioning pros.

Get matched with top heating and air conditioning pros in Catonsville, MD

There are 51 highly-rated local heating and air conditioning pros.

TRUSTED BY CATONSVILLE, MD HOMEOWNERS

Average homeowner rating star icon4.5
Average homeowner rating
Verified reviews icon714
Verified heating and air conditioning services reviews

Heating and air conditioning pros in Catonsville

Avatar for Zoned Heating And Cooling LLC
Zoned Heating And Cooling LLC
10999 Redrun Blvd #205
5.00(
8
)
Approved Pro
Zoned Heating And Cooling LLC
10999 Redrun Blvd #205
5.00(
8
)
Approved Pro
Warranties offered

Zoned Heating And Cooling LLC 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.

"Zoned Heating and Cooling arrived on time and efficiently diagnosed my A/C unit, and had it repaired quick. There prices were reasonable, I will definitely be a repeat customer. "

K A on May 2025

Zoned Heating And Cooling LLC 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.

"Zoned Heating and Cooling arrived on time and efficiently diagnosed my A/C unit, and had it repaired quick. There prices were reasonable, I will definitely be a repeat customer. "

K A on May 2025


Avatar for Blue Mountain Mechanical, LLC
Blue Mountain Mechanical, LLC
7308 Jonnycake Rd
New on HomeAdvisorNew on Angi
Approved Pro
Blue Mountain Mechanical, LLC
7308 Jonnycake Rd
New on AngiNew on HomeAdvisor
Approved Pro
19 local quotes requested
20 years of experience

We are a locally owned and operated company that values honesty and integrity and treats your home as if it were our own. We have many years of experience to give you confidence that we are your number one choice for your next home project. You will find us to be competitively priced with close attention to the details. We look forward to building a lasting relationship and guarantee your satisfaction!

We are a locally owned and operated company that values honesty and integrity and treats your home as if it were our own. We have many years of experience to give you confidence that we are your number one choice for your next home project. You will find us to be competitively priced with close attention to the details. We look forward to building a lasting relationship and guarantee your satisfaction!


Avatar for SM Mechanical, LLC
SM Mechanical, LLC
115 Orsburn Drive
4.67(
48
)
Approved Pro
SM Mechanical, LLC
115 Orsburn Drive
4.67(
48
)
Approved Pro
Customers say: Quality work
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers
24 years of experience

SM Mechanical, LLC brings an unmatched commitment to excellence to your HVAC or plumbing project. We deliver unsurpassed professionalism, expertise and value. Call today.

"Best price, great customer service"

Ed V on January 2022

SM Mechanical, LLC brings an unmatched commitment to excellence to your HVAC or plumbing project. We deliver unsurpassed professionalism, expertise and value. Call today.

"Best price, great customer service"

Ed V on January 2022


Avatar for Farnen & Dermer, Inc.
Farnen & Dermer, Inc.
10500 Reisterstown Road
3.67(
20
)
Approved Pro
Farnen & Dermer, Inc.
10500 Reisterstown Road
3.67(
20
)
Approved Pro
123 years of experience
Free onsite estimate

Our local and family owned and operated company at Farnen & Dermer has been a trusted name in HVAC for over 100 years. We offer expert heating, cooling, indoor air quality, and plumbing services to residential properties in Owings Mills and throughout Baltimore County. Our experienced, licensed, and factory-trained technicians will be there in a flash—proudly offering same-day appointments and 24/7 emergency repairs when you reach out to us by phone. If you need heater or AC replacement, we offer free estimates and flexible financing options, so a high-quality system doesn’t break the bank. From speedy AC repairs and heating maintenance to air filtration installation and boiler replacement, our team has you covered—backing up all our services with a 100% satisfaction guarantee.

"THIS COMPANY IS SCAMMING PEOPLE!!! -On 6/24/21, Farnen and Dermer installed a brand new YORK HVAC system in my home. Everything appeared to be fine, and there were no issues for 2 years. -On 8/28/23, I noticed an extremely loud buzzing coming from my outside unit, so I called them to come check on the problem. My unit was still cooling, but extremely loud. Glen A. showed up to diagnose the problem and seemed like a nice enough guy. After about an hour, he informed me that my entire indoor and outdoor unit need full replacement for a total of $10,900. (I paid $7,500 just 2 years earlier). I said, surely this was covered under warranty because the unit was only 2 years old? He then informed me that it was not because it was â struck by lightning and the warranty does not cover an act of god. -At this point in my head things were not adding up, especially since the unit was still cooling, both of my neighbors units were fine (townhouse) and he did not even check the inside unit. I told Glen I need to think about the replacement because that is a lot of money that I do not have at the time. Glen disconnected my outside unit completely before he left with the hottest week of the summer upcoming (95F-98F) and charged me $189 for the visit. -I am lucky enough to have a Fire Marshall as a good friend to ask him about the situation. This guy sees lightning strikes pretty frequently. He told me there is no way that my unit was struck by lightning based off of what I was seeing and also because it would have gotten to all of my neighbors units (townhouse). He informed me it is literally impossible. THE UNIT WAS STILL COOLING! -I decided to get a 2nd opinion from another company. The other company came out and told me that my compressor was bad and that there was no lightning strike to speak of. They also informed me that it was covered under the warranty and they could fix it. The technician said that he noticed the wiring on the outside unit was incorrect. There was a red wire crossed with a black wire. He said that is exactly why my 2 year old compressor went out. This company even put their findings in writing for me. They replaced my parts and got me up and running for 82% LESS THAN F and D! -I am not the only person this has happened to. It appears to be standard practice. You can see the attached pictures of reviews from other people in the same boat on the Better Business Bureau website. I will be submitting a complaint through BBB and demanding a full refund. This is pure predatory behavior and it is unacceptable!"

Dan W on September 2023

Our local and family owned and operated company at Farnen & Dermer has been a trusted name in HVAC for over 100 years. We offer expert heating, cooling, indoor air quality, and plumbing services to residential properties in Owings Mills and throughout Baltimore County. Our experienced, licensed, and factory-trained technicians will be there in a flash—proudly offering same-day appointments and 24/7 emergency repairs when you reach out to us by phone. If you need heater or AC replacement, we offer free estimates and flexible financing options, so a high-quality system doesn’t break the bank. From speedy AC repairs and heating maintenance to air filtration installation and boiler replacement, our team has you covered—backing up all our services with a 100% satisfaction guarantee.

"THIS COMPANY IS SCAMMING PEOPLE!!! -On 6/24/21, Farnen and Dermer installed a brand new YORK HVAC system in my home. Everything appeared to be fine, and there were no issues for 2 years. -On 8/28/23, I noticed an extremely loud buzzing coming from my outside unit, so I called them to come check on the problem. My unit was still cooling, but extremely loud. Glen A. showed up to diagnose the problem and seemed like a nice enough guy. After about an hour, he informed me that my entire indoor and outdoor unit need full replacement for a total of $10,900. (I paid $7,500 just 2 years earlier). I said, surely this was covered under warranty because the unit was only 2 years old? He then informed me that it was not because it was â struck by lightning and the warranty does not cover an act of god. -At this point in my head things were not adding up, especially since the unit was still cooling, both of my neighbors units were fine (townhouse) and he did not even check the inside unit. I told Glen I need to think about the replacement because that is a lot of money that I do not have at the time. Glen disconnected my outside unit completely before he left with the hottest week of the summer upcoming (95F-98F) and charged me $189 for the visit. -I am lucky enough to have a Fire Marshall as a good friend to ask him about the situation. This guy sees lightning strikes pretty frequently. He told me there is no way that my unit was struck by lightning based off of what I was seeing and also because it would have gotten to all of my neighbors units (townhouse). He informed me it is literally impossible. THE UNIT WAS STILL COOLING! -I decided to get a 2nd opinion from another company. The other company came out and told me that my compressor was bad and that there was no lightning strike to speak of. They also informed me that it was covered under the warranty and they could fix it. The technician said that he noticed the wiring on the outside unit was incorrect. There was a red wire crossed with a black wire. He said that is exactly why my 2 year old compressor went out. This company even put their findings in writing for me. They replaced my parts and got me up and running for 82% LESS THAN F and D! -I am not the only person this has happened to. It appears to be standard practice. You can see the attached pictures of reviews from other people in the same boat on the Better Business Bureau website. I will be submitting a complaint through BBB and demanding a full refund. This is pure predatory behavior and it is unacceptable!"

Dan W on September 2023


Santana Construction Services, LLC
3900 Jiggsy Ct.
5.00(
1
)
Santana Construction Services, LLC
3900 Jiggsy Ct.
5.00(
1
)
Customers say: True professional
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

At Santana Construction Services LLC, we have over 10 years experience and we take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship and complete customer satisfaction, from the start to the completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

"I had such a great team working on my home. Every project was completed exactly how I requested and done timely. The most important factor for me was how they cleaned up after themselves after every job. Also, the constant communication. The work is definitely quality. I did everything in phases just to get a feel of their work. I had electrical and painting done in my office and mudroom. I later decided to hire them to complete some electrical, painting, gym, and storage built out in my basement. I am saving up for the full bathroom I want done in my basement. Will definitely hire them again."

Tania B on January 2025

At Santana Construction Services LLC, we have over 10 years experience and we take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship and complete customer satisfaction, from the start to the completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

"I had such a great team working on my home. Every project was completed exactly how I requested and done timely. The most important factor for me was how they cleaned up after themselves after every job. Also, the constant communication. The work is definitely quality. I did everything in phases just to get a feel of their work. I had electrical and painting done in my office and mudroom. I later decided to hire them to complete some electrical, painting, gym, and storage built out in my basement. I am saving up for the full bathroom I want done in my basement. Will definitely hire them again."

Tania B on January 2025


Daj services Llc
No reviews
Daj services Llc
No reviews
7 years of experience

I specialize in service and installation of HVAC equipment as well as appliance repair dryer ,fridge ,washing machine and stove

I specialize in service and installation of HVAC equipment as well as appliance repair dryer ,fridge ,washing machine and stove



Ivan
No reviews
Ivan
No reviews
3 years of experience

"I am a certified HVAC technician with 2 years of experience, specializing in the installation, repair, and maintenance of heating, ventilation, and air conditioning systems. I pride myself on offering a professional, reliable and efficient service to all my clients. My goal is to make sure that every home and business has an HVAC system that works optimally, providing comfort and energy savings. Whether it's troubleshooting or optimizing your system's performance.

"I am a certified HVAC technician with 2 years of experience, specializing in the installation, repair, and maintenance of heating, ventilation, and air conditioning systems. I pride myself on offering a professional, reliable and efficient service to all my clients. My goal is to make sure that every home and business has an HVAC system that works optimally, providing comfort and energy savings. Whether it's troubleshooting or optimizing your system's performance.


New Life Painting LLC
12425 Detour Road
5.00(
2
)
New Life Painting LLC
12425 Detour Road
5.00(
2
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

We have more than 15 years of experience in complete remodeling, from changing the color of your room to completely remodeling your house. We give new life to your home. Painting interior and exterior, bathroom remodeling, Laminate flooring installation, kitchen remodeling, remodeling our work comes with 100% guarantee and we also offer free in person estimates and competitive pricing. We make sure we beat our competitors line of work and prices. we also strive in making sure all of our customers are happy and satisfied with our work is completed in a timely manner and we keep all our customers informed of our work and progress.

"They were the first service to come to the house to look at the job and provide an estimate, and two days later they came and did the work. They were fast, clean, and their work was excellent quality."

Jan S on March 2025

We have more than 15 years of experience in complete remodeling, from changing the color of your room to completely remodeling your house. We give new life to your home. Painting interior and exterior, bathroom remodeling, Laminate flooring installation, kitchen remodeling, remodeling our work comes with 100% guarantee and we also offer free in person estimates and competitive pricing. We make sure we beat our competitors line of work and prices. we also strive in making sure all of our customers are happy and satisfied with our work is completed in a timely manner and we keep all our customers informed of our work and progress.

"They were the first service to come to the house to look at the job and provide an estimate, and two days later they came and did the work. They were fast, clean, and their work was excellent quality."

Jan S on March 2025


Malgar Construction LLC
4.67(
3
)
Malgar Construction LLC
4.67(
3
)
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

All are included in the Residential Houses in all Maryland States. We are proud to provide standard service in and out of Home Improvement.

"Malgar Construction LLC is very professional. I have an old house and new hot tub and swimming pool. I couldn't use any of my new toys untilMalgar Construction LLC From keeping the appointment time to completing the work. Most of all you would never know work was done because they cleaned up everything."

Lashun E on July 2024

All are included in the Residential Houses in all Maryland States. We are proud to provide standard service in and out of Home Improvement.

"Malgar Construction LLC is very professional. I have an old house and new hot tub and swimming pool. I couldn't use any of my new toys untilMalgar Construction LLC From keeping the appointment time to completing the work. Most of all you would never know work was done because they cleaned up everything."

Lashun E on July 2024

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FAQs for heating and air conditioning service projects in Catonsville, MD

Knowing how long your existing HVAC units can last is essential to determine if you need a repair or replacement. Typically, most modern air conditioning units can last between 15 to 20 years, and most furnaces can work properly for 15 to 30 years. If your HVAC system is on the older side and you decide to replace one unit, it might make sense to replace both simultaneously to save on costs and future hassle.

While different HVAC contractors might offer higher or lower prices than competitors, the best time to replace your HVAC system is when customer demand is low. The beginning of summer and the beginning of winter bring the most demand for HVAC systems, so if you can, consider replacing your HVAC units in the early spring or fall. Many HVAC companies offer special off-season coupons that help lower the overall cost.  

The average cost to hire an HVAC contractor is between $50 and $150 per hour if charging hourly. However, some HVAC contractors will charge a flat fee by the type of service they are performing—for example, an inspection can cost between $150 to $500. Keep in mind that emergency repairs—which are made after business hours or around major holidays—generally cost more than scheduled repairs.

Yes, most states require HVAC technicians to be certified, and for good reason. Hiring an unlicensed HVAC technician could lead to poor quality work, costly future expenses, and potential code violations. 

As you browse our pro listings, take note of the “Angi Approved” badge. Angi Approved businesses meet our standards for certification which include: 

  • The owner, principal, or relevant manager passed a criminal background check

  • Required to have applicable state and local licenses

  • Maintain an average star rating of 3.0 or better on our network, if they have at least one review

  • Paying to advertise their services

  • Meeting any other eligibility criteria required by Angi

Keep in mind licensing is different from certifications. A license is a legal requirement to operate a business, while certifications are voluntary.

The average cost of HVAC repairs is around $350. However, that price can be as low as $100 or as high as $2,000 or more, depending on the repair. For example, replacing a capacitor is a relatively inexpensive repair, ranging from $100 to $500. However, a compressor repair is a more expensive repair, ranging from $750 to $2,000.  

The Catonsville, MD homeowners’ guide to heating and air conditioning services
From average costs to expert advice, get all the answers you need to get your job done.
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Jun 12, 2025
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What is a Manual J load calculation? It’s used to find out how many heating units your house needs. Discover how to use this complicated formula.
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