Reviews & Testimonials

I was referred to J&K by my previous HVAC company who closed the business.

On a Thursday, I discovered my water heater was leaking and the cold water intake shut-off valve was worn out so I had to shut off the main water for the whole house to stop the leak. Sent an email to Kyle at 8pm that evening. He called me a bit later and said he would come out the next day and at least replace the shut-off valve so I would at least have cold water. He showed up around noon with Tony and Joey and within a half hour they were putting in a new water heater. I couldn't have asked for better responsiveness.

These guys are great! Installation went smoothly. They were efficient and very thorough. Also very courteous, friendly, and patient with my questions and my small talk babbling.

We had a new A/C unit installed the summer of 2022 with another company - it never worked properly and that company spent the summer trying to get it to work. A rep from the manufacturer came in and said we needed all new duct work (we did not). The next summer we hired a different company to troubleshoot the problem. They, too, never fixed it but charged us every time they visited and monkeyed with the system. That was 2023. This past summer (2024) it was the same thing - our AC would work, then would shut down and we'd roast in the heat. After several visits with the old company, we called J&K and expected the same thing, just a different company.

J&K fixed it. I won't say they fixed it right off the bat because it took commitment, consideration, and working many days in our horribly hot house trying to figure out the problem. But they did it. They figured out what the others (including the AC rep) could not. And they were courteous and professional. We recommend them without hesitation.

We had been using what seems to be Gaithersburg's biggest company and had been satisfied until we were charged $229 for a ten minute install of a $2 part during a seasonal inspection.

I looked around at numerous companies and settled on three for estimates. Two were very competitive, but we ended up using J and K because 1) I really thought Kyle was talking to me from the perspective of someone who had a workman's knowledge of equipment and how to get a job done well. I appreciated his honesty;. 2) I did a deep dive into the equipment the three estimates offered and what Kyle offered for a very similar price was a step up from the other companies. The communication from the whole team was consistent and thoughtful.

I know Lennox has had some knocks years ago for its condensers, however my research indicated the company has gone well past that. When I look at the unit that was installed, it is really well made. Tight and solid.

Tony and Joey did the install, with Kyle setting them up and checking the finished installation. They were courteous, clean and their craftsmanship was excellent.

So, if you are thinking of replacing your HVAC, I urge you to get a quote from J and K. We are very happy we did and that we chose them to do the work.

We came home from vacation, to find sweltering temps of high 90s outside and 85 degrees in our house with our AC not working. We called J&K and the next morning we had an appointment. Scott immediately and deftly diagnosed the issue and had our AC fixed in less than an hour and the bill was less than $200! We were happy to find they are a family business and will definitely call them again for any other HVAC needs.

Sales Experience
Kyle was very responsive, came out and surveyed our needs, and quickly submitted a quote. Unlike some other companies' representatives, Kyle is a straight-shooter and didn't try to take advantage of us. He took care to make sure we had the correct replacement for our unusual air handler.

We signed the contract on a Thursday and had the installation scheduled for the following Tuesday.

Installation Experience
J & K’s installation team called us in advance, arrived on time, respected our home, and did a great job. Tony and Joey were clearly very knowledgeable and experienced. They took care to make sure that the installation was done right the first time. They gave straightforward, expert answers to our questions.

I'm an an engineer and a hands-on DIYer. I was VERY impressed by these guys. They know their stuff. I recommend them to you enthusiastically.

Kyle provided an affordable estimate and I was extremely pleased with the installation process/the whole process! Tony and Joey were on time, polite, courteous, friendly, professional, patient provided excellent service! Air Conditioner /Thermostat replaced.

Top notch professional service! Tony and Joey did a fantastic job, were detail oriented, took pride in their work, and were extremely respectful of my home while doing their work.

J & K replaced my furnace last week and were great! Kyle and the team were excellent and patient, addressing my concerns and helping me get the right product for my house all at a very competitive price. I highly recommend them!

Thanksgiving morning, I realized there was no heat in the house! I called J & K emergency number. Fortunately the emergency repair person arrived in my house within 45 minutes and located the problem, a broken thermostat. Again fortunately, he had a new thermostat in the truck, installed it and the heat was soon back on.

I've had Karl and his crew install 2 A.C. units and a furnace in my house over the past 10 years. They're always a pleasure to deal with and do the job right the first time. When my 20 year old A.C. unit had to be replaced this summer, I didn't bother looking around for a company to do the work. I already had J&K at the top of my list to call.

I have used J&K for 20+ years and they are great. Kyle is honest and always has great advice. They have serviced multiple systems (A/C, heat pump, boiler, hot water heaters), and have replaced them when needed as well. Always competitive pricing. They have also responded quickly more than once when I had an emergency situation. Highly recommend.

Just wanted to add to the cacophony of longtime customers, and my parents before me. J and K is the most trustworthy as another review simply states, of any service company or contractor I have ever encountered. Our AC I believe has finally died and I didn't think twice about turning to J and K. Have not had to buy an appliance before so can't comment on their prices but I have a feeling they will be more than fair and I know they will not oversell me.

They replaced both my hot water heater and hvac and did an exceptional job with a very fair price!

Outstanding service - quick response, friendly, expertly diagnosed problem and completed repair at a great price despite extremely hot conditions and high demand. Highly recommend!

I have been using J&K Heating & Air Conditioning Services for about 25 years. My husband often works out of the Country and when I have a crisis they make sure to squeeze me in. Our home is on 3 levels with two different heat/air zones. Last week in the middle of a heat wave the downstairs A/C was not getting cool or lowering the temperature. The office staff informed me that they would try to squeeze me in the next day and if not would call and provide another day and time. Sure enough Kyle showed up and not only did the necessary repairs but it explained to me (a woman without much mechanical knowledge) everything I asked and more. I always ask about maintenance and he says that they do not need to come out yearly as long as we change the filters. They are truly the best!!!

J&K Air Conditioning and Heating did a great job for us! They came highly recommended by a neighbor, and they did not disappoint. We received estimates from multiple companies for the same A/C system, and J&K’s price was the best by far. Kyle and Tony were very professional, they arrived at our home at the appointed time and completed the installation in one day. They instructed us on the operation of the new system and left their work area clean and neat. We highly recommend J&K!

I had a heating problem for over a year. Money was preventing me from result the issue. Based on a recommendation of a neighbor I called J&K Conditioning & Heating. They were at my home in 24 hrs and resolved the issue in less than one hour. I would highly recommend this company. Honesty is always the best policy.

I can't say enough good things about the folks at J&K. I've been a customer for many years. They were at my house earlier today for my annual heating and cooling checkup. Every aspect of their service is top notch, including quality and price, and they're friendly people who are very easy to work with. Highly recommend.

Tony was excellent! I am also a home inspector so I have some HVAC knowledge. He followed the covid-19 protocols. He found the problem quickly and resolved it. Didn't try to sell a new unit, it's older from 2000 so it's getting up there age wise. Price was on point. I would recommend Tony and this company for any service call needed for heating and cooling. Pro's!

if I could use one word to describe J&K air conditioning. It would be integrity.

Thank you to J&K for being honest, reliable and quick about helping us in our time of need. They have wonderful customer service and offer great rebates as well as affordable maintenance programs!

Great company. Good office staff. Very pleasant and helpful. Service techs are professional and knowledgeable. Prices were given up front and are better than most others I’ve used. Would definitely use again and refer to everyone

They do good work at reasonable prices.

I called this company for a rental property. I selected them based on google reviews from clients that highlighted the repairs done on their AC unit by J&K in lieu of AC replacement done by other companies. My preference is a company that is willing to repair and not so quick to replace. They did just that. Kyle showed up at my place and was very personable and flexible. He quickly diagnosed the issue with the AC and was there for maybe 15 minutes (assessment and repair). Done! Happy tenant, happy landlord!

J & K Air Conditioning & Heating services my AC/heating system for the last 10 years or so. Very professional, they come the same or the next day (depending on the urgency) and offer quality service at reasonable prices. They just replaced my AC/heating system with the new one, and all was done within a week of the first contact, offered detailed advice and help with energy rebates. All interactions were easy and pleasant. Highly recommend this company for all cooling-heating problems.

Kyle has been actively taking care of our heating and air conditioning for over 10 years and we couldn’t be more satisfied. He’s kept everything in tip top working order.

I have used J&K for 20 years and their service and quality are excellent.

Great company. Called in a problem at 8am and Kyle was onsite before noon. Problem fixed in less than 30 minutes and VERY reasonably priced.

Had to replace 23 year old furnace with cracked heat exchanger and 13 year old heat pump that was continually leaking refrigerant. They communicated well and provided excellent service at good prices. Installed Lennox units. Very happy with service and performance.

Very knowledgeable and courteous. Found the problem right away and did not try to sell like the last company we used. I highly recommend this company.

Used this firm for more than 30 years. I did not choose to compare anyone else when my furnace failed. I took his recommendation. They come when needed!

Great customer service! AC stopped working and they came out the same day to fix it. When it stopped working again they didn't hesitate to return after 5pm to get it running! Couldn't ask for better service!

Update:
2 years later, AC has continued to work without issue.

Very responsive and professional. I had both my AC and Heat replaced. They gave me a great price and so far very happy with the product. Would definitely use again.

We have used J & K for over 15 years during which time they have installed a new air conditioner and two new furnaces (post flood). During this time they have provided exemplary and thoughtful service to us. Kyle helped save our lives when a faulty vent cleaning service damaged our furnace vents after a cleaning visit and our monitoring systems indicated gas leakage. He showed up fast and solved the problem speedily. This is an outstanding service company.

J&K installed a new HV/AC system for me and did an excellent job! They were a total pleasure to work with.

Upon a recommendation from a friend, I tried J&K and was thrilled at the thorough service and professional work that was done. They wrote in detail what they did and spent much time making sure everything was in order.

Honest and reliable.

Great service and recommends items I might need and tells me the cost upfront.

Wow! What can I say about J&K? We have been using their services for almost fifteen years. They changed out our old heater for a Carrier about ten years ago. Never had an issue. Great deal, too. Then, they kept our thirty year-old central A/C unit running smooth for years, until finally upgrading us to a nice big Lennox. Kyle has done most of the service and installation himself. You couldn't ask for a nicer, or more knowledgeable, guy. We wouldn't go anywhere else for our HVAC needs. Great family business!

We have been using J&K air conditioning and heating for over thirty years. We have always been extremely satisfied with their service, cost, responsiveness and recommended products. The routine maintenance contracts that we purchase annually give us peace of mind and insure the timely and thorough maintenance of our heating and A/C units. We unconditionally recommend J&K.

These guys are awesome! We had no heat and they were here within about 30 minutes of us calling. Luckily it was an easy fix and the house is slowly warming up. Thank you again for the prompt, courteous and professional way you handled our heating problem!!

You can't do any better than Kyle and his crews. Honest and very reliable. We have used them for years.

Great service. Staff very helpful - always suggests improvements but is not pushy.

Family owned and operated and not one of your "coupon" vendors. Kyle is the best.

I'd give them an "A" overall. There wasn't that much to it, they checked my heat pump to make sure it was working properly, It took one guy about 20 minutes. I would use them again. I've been using them for many years.

Great work. Calls to see if problem is fixed after the job is done.

They have done my air conditioning and heating for twenty years. They are "A" everytime, that's why I've been using them so long. They are awesome. I have a service contract through them. I will always use them. As long as they are around I'm using them.

I am 100% satisfied with the service I received from J & K Airconditioning. Scheduling was easy, and they called ahead of time to remind me and confirm the appointment. I had a 3-4 hour time frame during which they would arrive and they were at my house and ready to work within the 1st hour, which might seem long to some people, but in my experience that's better than I can usually hope for when it comes to having a time frame. Their worker (I'm terrible with names, unfortunately) was very friendly and professional. My system has been having trouble keeping the 2nd floor of the house cool, and I'm a new home owner so I had a lot of questions, but he was patient and listened to every single one. He took the time to explain things to me and talk about what the problem was. Unfortunately, he determined that the main issue is that my air flow unit is over 30 years old and that my AC unit was installed separately causing my whole system to run inefficiently; all of which was not something I could get addressed that day. But he took the time to talk to me about things I could do to help alleviate the problem in the meantime and explained that when I replace it I need to be sure to replace the AC unit as well. He also let me know about several programs through my power company that would provide some reimbursement for when can I upgrade my system. He also determined that I was low on refrigerant and needed about a pound added. He was able to replace that for me right away. I have an older system so the refrigerant was actually the bulk of my total cost. All together I paid $98 for the inspection and labor and $150 for the refrigerant.

A new furnace is expensive, but the contractor installed it correctly; I had to ask him how to change the filter - this is something that should be told to the customer without request. Honest about the service and type of furnace I needed.

A/C unit went kaput on first really hot day of the season. Kyle ( The K in J&K) was super responsive, very helpful, and solve the problem quickly. I am now a chillin' & happy customer. Also, very reasonable price (at least compared with others in the area), and nice friendly response from J&K office person.

We recently moved here from NY, and these guys are now my go-to for HVAC issues.

Amazing family run business. I have used them for years and they have replaced a heat pump, A/C unit, and two hot water heaters. Tony is amazing and Kyle (owner) always has good reliable and economical advice. Prices very competitive as well.

Put in a new high efficiency HVAC system for our house three years ago; great price, excellent workmanship - no problems to date - highly recommend.

Great! I called around 3:00/3:30 to see if they could come out and they were able to get someone here by 6:00 which was amazing. We have been using J&K for 6 years and in fact use them because the prior owners had used them for years as well. Service is always professional, the people they send are friendly, knowledgeable and responsive. The person on the phone is great too, very friendly and called me back when she said she would.

Purchased hot water heater, AC and new furnace, including thermostat from J$K. Extremely professional and timely. Patient with a lot of questions. Good clarification of options. Interviewed 5 other vendors before using J&K. Prices commensurate or somewhat lower than other estimates. Customer service excellent. You won't be disappointed using J&K.

VERY RELIABLE AND HELPFUL

We hired a vent cleaning service to clean our furnace vents and duct work last year via Angie's List, who I have reviewed elsewhere. We were awakened in December at 2 AM by our carbon monoxide monitor, which registered near lethal carbon monoxide level. I turned off the furnace, turned on the vent fans in all bathrooms, opened all windows and doors and forced the air out. Kyle of J & K came out to help me. He checked the readings on our carbon monoxide monitor against his professional caliber carbon monoxide meter and discovered it was underreporting the levels of carbon monoxide. After some time spent in our still gaseous basement, he discovered that the vent cleaning company had damaged our furnace vents, as well as breaking our Aprilaire 5000 air cleaner. We already knew about the air filtration problem , but had no idea they had actually damaged our vents. Kyle and the staff of J& K (who were NOT the people who caused the vent and filtration damage) rearranged their entire work schedule for several very busy days to fit us in at the top of their list. They spent two days with us, totally replacing our furnace vents. We have not had a single problem since they did their work. We are deeply grateful to them. They dropped everything to help us, which they did effectively and at low cost. You can't find a better HVAC company than J& K. As to the vent cleaning company, I notified them of the problems. They reimbursed me for what I had paid them, but we had to swallow the cost of the furnace and air filtration repairs. Be very careful who you hire to clean your vents. The folks we hired came highly recommended via Angie's list. Read all reviews.

Excellent, prompt, honest service

We have used J&K for years and have always been pleased. They respond quickly and always fix the problem on the first visit.

great! We have used J&K for 5 years and they seem to try to send the same few people to service which means they know the house and history which is helpful. Always are polite and on-time and efficient.

I have been a J&K HVAC client since Feb 2010 when the furnace in one of my homes in Bethesda died during the blizzard. I had a Home Warranty company (American Home Shield) that assigned United Air Temp who made 3 visits with different techs during the week & had trouble diagnosing the problem before stating I needed a new furnace for $5000. I searched Checbook & found Kyle from J&K who came through the deep snow & offered a Trane 95% for total-$2706. Since then, I have called J&K for HVAC service. Kyle is the owner. His wife, son & daughter are all involved in this family run company. Tony, the tech, is an amazing friendly wizard who can diagnose, explain & repair problems. J&K is Very Highly Recommended!! Very Efficient, Professional,Friendly & Extremely Reasonable pricing!

I have been a customer of Kyle and J&K for over 22 years. He replaced our old oil furnace and air conditioner in 1992. We've been in the house for so long that those units came to end of life and he replaced the furnace with a new Carrier condensing unit in fall 2012 and the air conditioner with a new Carrier unit in March 2014. Both jobs were neat, excellently done, and the systems work perfectly. Kyle is very easy to work with and treats you like a friend and his prices are exceptional (and yes, he does take credit cards).

Very well. Speedy service. Moderate labor costs: $125 for a half hour. Cheering to know we have no visible cracks in our high efficiency furnace, which J and K installed 10+ years ago. We have had very positive experiences with this company for the last 10 years. When we had them put in the furnace, J & K was the low bidder on the job. We have found them to be excellent and have had almost no problems at all with the furnace and air conditioning in ten years.

Kyle and crew went above and beyond in replacing our central AC unit. This is after keeping our old unit alive several years longer than it's service life.

We have a complex AC and heat pump system. They are just wonderful at helping us. They replaced our furnace this year, and were good at giving options and costs

Excellent company.

Their work was outstanding. They replaced both the outside heat pumps and the inside electrical furnances for the two existing heat pump systems. We also had humidifiers installed on both units. They removed and hauled away the existing equipment and made slight adjustment in the existing duct work to ensure that I received the benefits from the new systems and their higher efficiency. They started at the scheduled time and completed the work on schedule. The staff was very professional and I am very pleased with the work that was performed.

My first contact with the firm was just to recharge the refrigerant. The firm was polite, kind, and helpful both when I called and when the tech came to visit. They were able to schedule a tech visit on the same day (even though that wasn't needed or expected). The tech was thorough and provided helpful advice.

Kyle is wonderful! He is my (& was my parents on my recommendation until they moved to a retirement facility) go to guy for all of my heating & air conditioning needs. He has other people do some work for his cornpany now who thus far have not disappointed. But he is absolutely honest, straight forward & can b completely trusted & he has very good pricing. I've found businesses who started out wonderful, but slowly declined as they grew. So I still have my 3 minimum rule (where I call @ least 3 different providers for estimates) Thus far, J&K is still the best bet in town!

Overall it went extremely well. I called this morning thinking I would get an appointment in 24 hours but instead they scheduled it for later in the morning. Got a call letting me know he was on his way and he was there within 10-15 minutes. Extremely knowledgeable, polite and answered all my questions.

I have been using this HVAC service for over 25 years. This year I replaced the HVAC system in my 20 year old home since the old one was on borrowed time and less efficient than today's new offerings. Kyle Fleming is J&K to me, although he has added employees in more recent years. He is the reason I use the company, very high integrity. I was very satisfied with the time he took to help me select a new system (gas furnace, central air conditioner, coil, new thermostat, and media filter that I wanted). It was installed in a timely manner (one day). Highly recommend.

superb service and well priced

I got several bids to install the Mitsubish "mini-split" unit in my home office. I had a through-the-wall A/C unit for years, combined with electric baseboard heat. The heat was fine, but I was having problems with the A/C unit and was tired of the level of noise, so decided to have a mini-split unit installed. I got several bids from recommended companies for the unit I wanted and J and K was the lowest by several hundred dollars. Even though they had a preference for another brand, they were happy to order and install the one I requested. They were prompt, professional, neat, extremely pleasant, and did a great job with both the indoor and outdoor installations. The unit is everything I had hoped it would be, and I am very pleased.

Kyle is always reliable and does great work. We recently installed a unit to cool and heat our new basement. J and K has taken care of all our air conditioning and heating needs for more than ten years.