Top-rated heating and air conditioning pros.

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

There are 20 highly-rated local heating and air conditioning pros.

TRUSTED BY KNOXVILLE, MD HOMEOWNERS

4.4
Average homeowner rating
1.9k+
Verified heating and air conditioning services reviews

Verified Reviews for Heating And Air Conditioning Service pros in Knoxville, MD

*The Angi rating for Heating And Air Conditioning Service companies in Knoxville, MD is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Heating And Air Conditioning Service needs.

*The HomeAdvisor rating for Heating And Air Conditioning Service companies in Knoxville, MD is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Heating And Air Conditioning Service needs.

Last update on November 13, 2025

Reviewed in April 2024
Can't recommend enough. He is great to deal with I will be calling and using for all HVAC and water heater issues
Last Minute Services, PLLC
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Reviewed in December 2020
Home Air Services has been an excellent provider of routine and specialized maintenance of my air conditioning and heating system. I strongly recommend them.
Vito Services
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Reviewed in June 2017
We have used them for years. We have a contract with them for the heating and the air conditioning. They come out in the Spring and check out and tune up the air conditioning and then they do the same in the Fall for the furnace.
Thomas E Clark Inc
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Reviewed in August 2015
The AC stopped working in July. We received bids from 3 installers to replace our 20-year-old furnace and AC. The bids for a 16 SEER 2.5 ton AC and gas furnace were $4300 with Comfortmaker by Total Comfort $5359 with Carrier installed by Kirkwood Heating and AC $6964 with Carrier...
Total Comfort Heating Air Conditioning LLC
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Reviewed in February 2014
Took out a window in order to enlarge it to make it an adequate escape exit. Installed security bars, Replaced wall air-conditioner with an in-wall heat pump.
Premier HomePro
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Reviewed in August 2012
I highly recommend Rowan Heating and Air Conditioning to anyone in need of these services.
Rowan Heating & Air Conditioning Inc
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Reviewed in July 2012
Oscar Corado supposedly owns a company called "Osalco," but I doubt that it is registered in DC or MD. We needed an HVAC specialist for our 6 unit apartment building, and he came highly recommended by my realtor. He is arrogant, but he always returned my calls and showed up to the job site on...
Oscar Corado
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Reviewed in September 2007
Flood Air Conditioning, Plumbing, & Heating installed our air conditioner 2 years ago. They are familiar with the unit and know what it needs yearly to run efficiently and in good working condition. I was impressed with the fact that they remembered my name when they got here. The appointment...
John C. Flood - DC & Maryland
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Reviewed in July 2006
We have Adema Heating for years to maintain our furnace and air conditioning. They are very consistent with the quality of their work and very reputable.
Adema Heating & Air Conditioning, Inc.
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Find Heating and air conditioning pros in Knoxville

Presidential Heating & Air Conditioning

Presidential Heating & Air Conditioning

Customers say: Super punctual

172 local quotes requested

43 years of experience

You and your family deserve to receive the best care and the best service. Not every heating & A/C company gives you the quality people and care that Presidential does. We offer 40 Years of Award-Winning Quality People, Quality Installation, and Quality Service. Delivering this quality service and care for your home is our commitment to you! Family-owned and operated, Presidential specializes in residential and light commercial service and installation throughout MD, VA & DC. Ask us about our system replacement specials and The Advantage Maintenance Plan for preferred VIP service. Presidential has been awarded the Carrier Factory Authorized Dealer Award and is a member of the ACCA (Air Conditioning Contractors of America) and the Quality One service network.

"Excellent service! I had a 26yr old A/C and Propane furnace that I wanted to update to an ALL ELECTRIC high efficiency heat pump. The price in the estimate was much higher than I was expecting, but they worked with me and brought it down considerably, provided I could accept an install slot in a couple of days due to a cancellation. Go for it, I thought! Unfortunately, it turned out that the estimator/salesman (who shall remain nameless) apparently got a bit confused and set up the equipment as a hybrid propane system - not the all-electric system that I wanted. Ugh. I only realized this when the installers had the indoor unit in place, and I saw the propane burners. Doh! So, I explained the situation to them, and they pulled the unwanted unit out and jumped through the hoops to order the correct unit and its accessories (wiring, breakers etc.), with no change to the price. They were very friendly and polite through all of this even though it meant the wasted work and that they had to come back the next day with the new IDU. Anyway, the final install all went well, and they were very friendly and respectful of the property and explained all the install details as they went (sorry Melvin, for all the pestering!) I'm very happy with the company and the installer's knowledge and professionalism. RECOMMENDED!"

Mark Q on October 2025

"Excellent service! I had a 26yr old A/C and Propane furnace that I wanted to update to an ALL ELECTRIC high efficiency heat pump. The price in the estimate was much higher than I was expecting, but they worked with me and brought it down considerably, provided I could accept an install slot in a couple of days due to a cancellation. Go for it, I thought! Unfortunately, it turned out that the estimator/salesman (who shall remain nameless) apparently got a bit confused and set up the equipment as a hybrid propane system - not the all-electric system that I wanted. Ugh. I only realized this when the installers had the indoor unit in place, and I saw the propane burners. Doh! So, I explained the situation to them, and they pulled the unwanted unit out and jumped through the hoops to order the correct unit and its accessories (wiring, breakers etc.), with no change to the price. They were very friendly and polite through all of this even though it meant the wasted work and that they had to come back the next day with the new IDU. Anyway, the final install all went well, and they were very friendly and respectful of the property and explained all the install details as they went (sorry Melvin, for all the pestering!) I'm very happy with the company and the installer's knowledge and professionalism. RECOMMENDED!"

Mark Q on October 2025

GAC Services

GAC Services

Customers say: Quick response

Recommended by 93% of Angi customers

620 local quotes requested

GAC Services is a residential cooling, heating, and electrical contractor setting new standards in the Maryland HVAC and electric market. Since 1970, we’ve developed a strong reputation for providing the Montgomery County and Frederick County areas with reliable cooling and heating services. In 2014, we expanded our service offerings to include electrical services—allowing us to offer our customers the same great service in a new area of business. Additional DBA: Gaithersburg Heating & Cooling

"Highly professional, knowledgeable and well behaved technician. Prices offered were good too. I definitely recommend the company."

Deepak K on February 2025

"Highly professional, knowledgeable and well behaved technician. Prices offered were good too. I definitely recommend the company."

Deepak K on February 2025

F.H. Furr Plumbing Heating & Air Conditioning Inc

4.33(

)

•Approved Pro

F.H. Furr Plumbing Heating & Air Conditioning Inc

4.33(

)

•Approved Pro

Customers say: Super punctual

186 local quotes requested

44 years of experience

Whether you need a repair, preventive maintenance, or replacement, we are your plumbing, heating, and air conditioning service provider in the northern Virginia and surrounding areas. We invite you to give us a call!

"Nice, reliable, and responded immediately."

Ethan Q on January 2025

"Nice, reliable, and responded immediately."

Ethan Q on January 2025

TriState Home Services

TriState Home Services

Customers say: Super punctual

236 local quotes requested

76 years of experience

If you are looking for a HVAC Contractor, a Plumbing Contractor, or an Electrical Contractor to provide you with great service, you've come to the right place. We provide heating services, air conditioning services, plumbing services, and electrical services to our customers in Frederick and the surrounding Counties, the Pan Handle of West Virginia, and Northern Virginia, from our offices located in Frederick MD. With 3 generations of experience in providing heating, air conditioning, plumbing, and electrical services, we are dedicated to providing the best possible products and services for you, and your family.

"Great service very prompt and easy to work with."

Randy W on May 2025

"Great service very prompt and easy to work with."

Randy W on May 2025

Petro Home Services

4.44(

)

•Approved Pro

Petro Home Services

4.44(

)

•Approved Pro

Customers say: True professional

574 local quotes requested

122 years of experience

With over 100 years experience, we know how to keep you comfortable, safe and help you save on energy costs. Our local 24/7 customer service and support means automatic heating oil deliveries and our service response is always fast. We never run out of heating oil plus our pricing and payment plans are designed to help you manage your costs all year round. Experience the Petro difference today!

"Worst service I’ve ever have experienced. They wanted to sell me the product, never told me that there was an early termination fee and another penalty for an initial offer they gave me. Had double charges every month, once for the oil they provided (which they never told me they were going to provide before coming. They just came without my knowledge and then I find a high amount bill) and another for an “automatic payment” for 500 that they never could explain. The didn’t even fix this issue and it kept happening every month even after I cancelled the service. Then having to call them is a hastié for the refund of the 500. Stay away of this company"

Axel R on January 2023

"Worst service I’ve ever have experienced. They wanted to sell me the product, never told me that there was an early termination fee and another penalty for an initial offer they gave me. Had double charges every month, once for the oil they provided (which they never told me they were going to provide before coming. They just came without my knowledge and then I find a high amount bill) and another for an “automatic payment” for 500 that they never could explain. The didn’t even fix this issue and it kept happening every month even after I cancelled the service. Then having to call them is a hastié for the refund of the 500. Stay away of this company"

Axel R on January 2023

Weather Masters Corporation

Weather Masters Corporation

Customers say: Quality work

Recommended by 99% of Angi customers

69 local quotes requested

Here at Weather Masters we pride ourselves on affordable, reliable and honest service. With free replacement estimates and competitive service rates, we do our best to keep you and your bank account comfortable.

"Great folks to work with"

Tom H on September 2023

"Great folks to work with"

Tom H on September 2023

Wenbrooke Services

Wenbrooke Services

Customers say: True professional

Recommended by 95% of Angi customers

90 local quotes requested

It is our mission, to provide excellent workmanship and complete customer satisfaction, from start to 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.

"They did a great job. "

Atiq H on July 2025

"They did a great job. "

Atiq H on July 2025

SPECS Heating & Cooling

5.00(

)

•Approved Pro

SPECS Heating & Cooling

5.00(

)

•Approved Pro

Customers say: Quick response

104 local quotes requested

1 years of experience

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 start to 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.

"Service was fast and courteous. Both techs, Jermaine and Raoul, were great!"

Karen J on September 2025

"Service was fast and courteous. Both techs, Jermaine and Raoul, were great!"

Karen J on September 2025

Holtzople Heating, Air Conditioning, & Electrical Services

Holtzople Heating, Air Conditioning, & Electrical Services

Customers say: Quality work

Recommended by 96% of Angi customers

44 local quotes requested

Holtzople is a leading HVAC company in Frederick, Carroll, and Washington counties in Maryland, as well as Adams and small parts of Franklin & York counties in Pennsylvania, featuring all the top brands in the Heating and Cooling industry, such as Trane, Bryant, Lennox, Carrier, ClimateMaster, WaterFurnace, and more. We recently added an electrical department to our services, making us your one-stop shop for HVAC and electrical needs. Quality is Not Expensive, It's Priceless!

"We had an outstanding experience with Holtzople Heating, Air Conditioning & Electrical Services thanks to the excellent work of Andrew and Jake. From the moment they arrived, they were professional, courteous, and clearly very knowledgeable. Andrew and Jake took the time to explain everything they were doing, answered all of our questions patiently, and worked efficiently to get the job done right. Their attention to detail and commitment to quality were obvious throughout the entire process. Our installation was seamless and we are very pleased. It’s not every day you find staff who combine technical skill with great customer service, but these two really delivered. It’s clear that Holtzople hires top-notch staff, and I wouldn’t hesitate to recommend their services to anyone. In fact, we are now repeat customers and have used Holtzople for additional services. Thanks again to Andrew and Jake for a job well done, and Holtzople for providing excellent products and services!"

Joanne M on October 2025

"We had an outstanding experience with Holtzople Heating, Air Conditioning & Electrical Services thanks to the excellent work of Andrew and Jake. From the moment they arrived, they were professional, courteous, and clearly very knowledgeable. Andrew and Jake took the time to explain everything they were doing, answered all of our questions patiently, and worked efficiently to get the job done right. Their attention to detail and commitment to quality were obvious throughout the entire process. Our installation was seamless and we are very pleased. It’s not every day you find staff who combine technical skill with great customer service, but these two really delivered. It’s clear that Holtzople hires top-notch staff, and I wouldn’t hesitate to recommend their services to anyone. In fact, we are now repeat customers and have used Holtzople for additional services. Thanks again to Andrew and Jake for a job well done, and Holtzople for providing excellent products and services!"

Joanne M on October 2025

Cyprus Air Heating, Cooling and Fireplaces

Cyprus Air Heating, Cooling and Fireplaces

Customers say: Quality work

29 local quotes requested

58 years of experience

FREE IN-HOME ESTIMATES | GET A FREE AIR CONDITIONER Cyprus Air Heating & Cooling is your single resource for all your home comfort needs, from tailoring your ideal comfort system to installation, service and beyond. Cyprus Air installs and repairs a variety of Heating & Cooling equipment. With over 56 years of experience in the business, we also offer other home improvement and indoor comfort services such as Gas Fireplaces & Gas logs, and Duct Cleaning. With so many years of design, and installations in Northern Virginia, DC and Maryland, Cyprus Air offers its service oriented expertise and reliability to ensure the high quality standards that architects, engineers, and homeowners have come to rely on from one of the industry leaders.

"I called to get an inspection done on my AC unit and was quoted $90 for the inspection plus $120 an hr for ADDITIONAL hrs. I ASKED when do I know when the “additional hrs start”, He stated that the tech would let me know once the inspection was done and then at that time he would let me know if there was work that needed to be fixed or if there was nothing then the service would end and I would only have to pay the $90. They charged me $210 for the inspection. I called and requested that we both listen to the call (Because all calls are recorded) They played the call, heard what the rep said and then stated they would get back to me. When I finally reached them again (they never called me back), they stated I would not get a refund, then replayed the call cutting out the part when the rep stated clearly that the service was only $90. They not only GASLIGHTED me, but they altered the recording. $120 may not matter to most but it sure matters to me."

Kay H on June 2025

"I called to get an inspection done on my AC unit and was quoted $90 for the inspection plus $120 an hr for ADDITIONAL hrs. I ASKED when do I know when the “additional hrs start”, He stated that the tech would let me know once the inspection was done and then at that time he would let me know if there was work that needed to be fixed or if there was nothing then the service would end and I would only have to pay the $90. They charged me $210 for the inspection. I called and requested that we both listen to the call (Because all calls are recorded) They played the call, heard what the rep said and then stated they would get back to me. When I finally reached them again (they never called me back), they stated I would not get a refund, then replayed the call cutting out the part when the rep stated clearly that the service was only $90. They not only GASLIGHTED me, but they altered the recording. $120 may not matter to most but it sure matters to me."

Kay H on June 2025

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Heating and Air Conditioning questions, answered by experts

When a compressor gets overheated in central air systems or heat pumps, it can still cool your home for a while until it eventually gives out. If the compressor is chronically overheated and no one addresses the root cause, it will create an incredibly expensive problem when your entire HVAC system breaks down and stops working altogether.

Winterizing can still help you save money on energy costs and help prepare your AC for its work next year when you turn it back on. We suggest planning for at least some maintenance, even if winters are mild in your area.

Unlike other types of air conditioning, portable units don’t require venting or any other associated parts like hoses. For that reason, they don’t function the same as their counterparts, but will do a similarly good job of cooling down small spaces and won’t require any installation or much maintenance.

An air conditioner’s watt usage depends on multiple factors, including the type of AC unit, its size, and how often you use it. With that said, most central air conditioners consume between 3,000 and 3,500 watts. Meanwhile, window AC units use 900 to 1,400 watts, and portable air conditioners consume 2,900 to 4,100 watts.

There are several AC unit problems to troubleshoot, but luckily you can identify them by keeping a close eye on your system. Look out for the following signs that your AC needs repair:

Unusual noises during operation
AC unit blows warm air
AC unit doesn’t come on or turn off with temperature changes
Strange odors come through the vents
AC unit cycles on and off rapidly
Indoor air is more humid or less comfortable than usual
AC unit keeps tripping your breaker
Fan in the outdoor compressor doesn’t operate when the AC is on

The Knoxville, 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.

See all articles

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Discover the primary whole-house air filtration system cost factors when installing one in your home to help remove airborne contaminants and allergens.
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•
Oct 20, 2025Oct 20, 2025
How Much Does It Cost to Replace an AC Condenser? [2025 Data]
If you’re having problems with your air conditioner’s condenser, it may be time for an upgrade. Learn about the cost to replace an AC condenser in this guide.
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•
Nov 10, 2025Nov 10, 2025
Comprehensive Heat Pump Maintenance Checklist
Save energy and prolong the life of your heating pump with proper maintenance and preventative care. An annual service will keep things running smoothly.
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•
Oct 23, 2025Oct 23, 2025
What Is a Boiler Room?
Find out what a boiler room is, what happens in a boiler room, and what safety precautions you need to take if you have a boiler room in your home. Our expert guide walks you through boiler room basics, including location and purpose.
Mizuki Hisaka
•
Nov 10, 2025Nov 10, 2025
When to Replace Your Boiler: Learn About These 7 Signs
Knowing when to replace your boiler will help you avoid last-minute emergencies in the middle of winter. Here are seven signs that you may need a brand-new unit.