You now have a lifetime customer!! They saved me thousands in a matter of 10 minutes!! I cant thank you enough! THANK YOU!!!!!

Very professional, very knowledgeable, they go the extra mile. I would highly recommend! They are my air conditioner repair company for life. Mike and Walter are awesome. Thank you so much for your good service.

I first used Stalwart to repair and maintain an older AC unit for 2 years. We recently purchased a new Trane System from them. The install was very clean and above and beyond when it came to quality. I will continue to use their services. Thank you Ato and Walter for great service!

I contacted Stalwart Mechanical Services because my AC was not cooling. I received a call back within 30 minutes. The technician Mike went above and beyond the call of duty to add me to the schedule on a Saturday, he kept me updated on the progress of the work. I received exceptional customer service from Mike and he explained in detail what caused my AC to stop cooling. I would definitely refer Mike and his company to family and friends!

Stalwart Mechanical Services is ABSOLUTELY AMAZING! Furnace stopped working over night and woke to 66 degrees in my home. Called them at 5 am and got a live person who was so nice at that time of morning. She schedule a service call for the afternoon. Otto came out and quickly found the issue. Within 5 minutes I had heat again! Huge thanks to this company and Otto. They have a customer for life!

As others here have stated, Stalwart Mechanical Services is top class in every way. Both Ato and Walter are professional, punctual, friendly, very knowledgeable, willing to educate you on what the problem was, why it broke, and how they will fix it, and their services are fairly priced. Their scheduler/office manager is also kind and friendly and works with you in finding a speedy time to have someone come to you and address the issue. I have used Stalwart for both my business and my home and would not use anyone else. Big thanks to both Ato and Walter for the help and the education. These guys have integrity - an extremely valuable trait in todays society. Dont hesitate to use their services.

We had an issue with our A/C and my people in my area recommended Stalwart Mechanical Services. it was said that they were fair and highly professional. I must say that WITHOUT A DOUBT this company was an AMAZING choice!My technician was VERY professional, respectful, helpful & fair. They took the time to answer all of my questions and throughout the process stayed in constant communication with me. I appreciate their hard work and dedication to what they do and I would 100% recommend Stalwart Mechanical Services to any and everyone! They believe in helping people and doing their job properly. They are also very efficient and address/fixed my issue within a matter of a day or two of my calling about my A/C problem. Thanks to Stalwart Mechanical Service I have a brand new high quality A/C unit just in time for these summer days.Thank you again Stalwart you guys are phenomenal!!!! 😃

They were quick and very informative. I’ll happily continue to use these guys for any maintenance issues I have in the future.

Stalwart provide great service from both the office and the technicians. They are professional, knowledgeable, prompt, friendly and ensure that you are completely satisfied with their service. I have no hesitation in recommending them. Thank you Stalwart Mechanical Services!

Great guys who were courteous, on time, and got it done super fast from time of diagnostics to time of install of new equipment.

Got into trouble with faulty furnace during arctic blast power outage. Stalwart have been responsive, quickly arranged a personnel. Ato visited on time and diagnosed it promptly and answered all my questions. Got to heat uo home again. Will recommend.

I have used this business for the past 8 years. Walter is not only reasonable with his fees, but he is very knowledgeable. We bought a new home 4 years ago and Walter has found several things the builder has done wrong with our new a/c unit. One of which was the builder dry walling one of the returns. I have referred this business to all of my family and friends who also use Walter for all their a/c needs. The best part of using this company is the honesty and professionalism.

Had the pleasure of having Ato come to fix a broken pipe after the Houston snowpocalypse. Couldn’t be happier with their service! I was able to have them come the next day, despite a high load of plumbing issues across the area. Ato was very kind, professional, and knowledgeable. This company truly cares about their customers. Would recommend to anyone for reliable HVAC service!

I know who to call first when I have a HVAC issue. Stalwart Mechanical Services has helped me with residential and commercial HVAC repair and maintenance. They helped me find the best price, were on time, and professional yet friendly. I cant say enough good things about them.

I did my research on which company to replace my aging 4 ton a/c unit for the downstairs of our house. Im so happy we had it done with Ato and his team at Stalwart. They did such a professional and clean job compared to what was there originally. It makes such a big difference on how a system is installed in order for it to work properly for the long term. These guys know what they are doing.

They were amazing. Was able to schedule an appt. next day. Walter arrived on time, very professional. Gave us informative and honest feedback on our situation and was able to repair at an affordable price.

Walter is great and Best service ever. Always on time honest and professional. The work he did was excellent on my Ac system. His work is always clean and prompt. Will recommend him to everyone I know.

Great service! I sent them a message and they responded very quickly. We set my service date and time for them to come out the very next day. Our service guy, Ato, arrived on time, checked out our problem and explained everything. Good price for quality work. I would definitely recommend Stalwart if you need service. I will use this company again for sure!

Oh my gosh! This company was a complete blessing!!! We have a home warranty and they had been giving us a run around for 7 days, meaning we have had no a/c for the whole time. We prayed and felt lead to seek a 2nd opinion and Stalwarts was our answer to prayer! They were supposed to be out THE SAME DAY between 3 and 6 and they came at 12! We had been told parts needed to be replaced by another company that would have cost $2000-$3500. Walter, the technician that came out today, was able to FIX the issue and saved us a couple of thousands of dollars unnecessary repairs.Walter was so kind and professional. He never complained about the heat or the work he was doing. He and Stalwarts were truly God Sent!!

We have been using this A/C company for years and are very happy with their knowledge, professionalism and responsiveness.They are honest and reasonably priced. Walter and Otto have been awesome for repairs and routine maintenance service. They are the best in Pearland.

Stalwart’s extensive HVAC knowledge combined with integrity and transparency results in quality, affordable work that is timely, clean, and precise.

Wow, incredibly impressed. Great guys and fantastic service. My AC gave up on a 100 degree Saturday, called in the morning and they were able to fix same day no problem and no overtime rate. Would have had to wait till Monday at twice the price with other people I had called.Showed up timely and were very friendly and helpful.

They quoted me a competitive price for a new ac unit install. Once I gave them the ok they were at my house the next day and finished in 3 hrs. Very friendly receptionist and good techs. Thanks for the deal!

Walter was very efficient and reliable. I had received 3 quotes from other a/c companies that were inflated. Stalwart provided the best quote so I was able to get a better unit at a fair price. They paid attention to detail, were on time and after installing unit, they did a thorough clean up. I highly recommend Walter and Stalwart Mechanical.

Ato was very professional and explained the issues in layman terms. This company truly looks out for the best interest of the customer. Stalwart checked to see if there was an existing warranty prior to pricing which I truly value and appreciate it. I will be recommending Stalwart to everyone I know. Thank you Lamont, Walter and Ato.

Excellent Service. These guys do really good work. I trust their services.

This company is great! I highly recommend them. They came on short notice and fix our repair quickly. The repairman Ato was a very nice man and honest. This was the first time we have had a AC repair job done and didnt feel the company took advantage of us. He went over and beyond. He also made recommendations for the future. I will refer anyone to us them.

I strongly recommend Stalwart Mechanical Services. They are very professional and fair. Walter and Ato do a professional job at a fair price.

Walter and his partner did an excellent job. Installed a brand new evap coil and plenum chamber. Very competitive pricing and great quality workmanship. He explained everything in detail and was very clean and tidy. Definitely will be using Walter and Stalwart again.

I had a very good experience with Stalwart Mechanical Services. A couple of days ago, my ac went out. I searched and found Stalwart and read all of the positive reviews regarding their service. Ato was very helpful and knowledgeable and repaired what another company didnt even touch three years ago. He showed me what he was doing throughout the process and I appreciated that. I highly recommend their services whenever you have a need.

When I called for services, my call was answered right away. My appointment was made right away, and the service man made my appointment the next day! Atto was amazing, and very nice! I will use them this company for all my air conditioning needs in the future!

My evaporator coil developed a leak, and in the process of getting quotes I found Stalwart to have a very reasonable price with high quality components. They inspected the system and gave me an electronic quote at no charge, and were quick with the install date once I gave them the go ahead. Ato and Walter were both very professional and thorough in the job, and walked me through all the work they did at the end. The house cools great, and all my future AC work will be with Stalwart!

Ato and Walter stayed late to get my system cooling in near triple digit temperatures.Great service and very professional.

I used many A/C service companies because of my professional needs. Mr. Walter is definitely one of the best. I like his honest and straight forward attitude about the diagnose and repair option. So the owner can make an educated choice. The job is very well done. I do recommend him for A/C service.

Walter and his partner did very good work. After they are done, I have someone gave me an estimate on attic insulation. The attic insulation guy checked the attic and made a comment, Whoever did you AC did a very good job. Walter is a trustworthy guy. I highly recommend them.

These folks just completed installing two Trane compressors (outside) and expansion coils (attic), and they did a terrific job. I couldnt be happier. This is the third time Ive used these people, and it always seems the same, excellent. They show up when they say they will, and today the office called to tell us they were running a bit late (about 10 minutes). Another reviewer says they gave them the best A/C service ever. I agree.

Ato came put to check everything and provide an estimate. Walter and his assistant came out to change everything out. They were all great. Friendly, professional, and even helped me with some blinds that fell while I was closing the windows, bless them! Walter showed me all of the work they did in changing out the AC system and was so considerate about cleaning up after their as much as possible. I would highly recommend them!

Walter,Came to my house on the weekend when my a/c was down. He was punctual and arrived at my house when he said. He was very professional and respectful when navigating throughout my house. And he repaired, cleaned, and recommend filters for my unit. I will definitely have them back to clean my furnace. Great company!!!

We asked a check up for our A/C before we list our home. The person from the company, Walter F, came to do the work along with drainage cleaning in a very professional manner (articulate, kind and knowledgeable). On the day, the temperature was a little bit low, so it was difficult to check cooling part, but he tried to do everything to make sure our system is working. Very nice service and the price is very reasonable. I highly recommend the company, particularly the person. Thanks!

Stalwart Mechanical Services has provided top-notch ac service for us. We highly recommend them to others. Alto has come out on short notice and got our ac units up and running fast! Give them a call the next time you need your ac serviced.

Everything was done professionally and at a fair price. This company does excellent work. I would recommend Walter and his company without any reservation. They can be totally trusted.

AC was blowing warm air and called Stalwart to diagnose the issue. Walter came and diagnosed the issue with the coil, gave a detailed on quote on the cost and took time explain everything in detail. Walter & Ato were very courteous and were very professional in their work. Stalwart will be the first number I will be calling for any future AC issues.

So far the best service we have experienced. Walter was direct to the point in giving solutions to our AC problems and was able to complete necessary repairs in one day. Very reasonable price, too! Would definitely recommend them to our friends and neighbors.

Professional and knowledgeable group. Fair pricing. I felt like they were looking out for my best interest when it came to repairing my AC unit. Would recommend as a first choice for HVAC needs.

Had to get an AC tuneup on both my units and 1 unit was acting up. Walter checked everything out and added some freon and everything has been working great ever since! Very reasonable pricing and good work!

They were so nice and gave a good service.

I highly recommend Stalwart for their professionalism. Ato was a great help when we had to replace our A/C and furnace. He was always willing to answer our questions, and will definitely do business again in the future. He was also able to come out to our house on very short notice when we were having A/C and heater issues prior to replacing them. A+ for fantastic service.

This is the best service Ive received from an air conditioner company. Ato was the technician, he went over and beyond. He did an excellent job. My system hasnt run this well since I moved in my home. I highly recommend this company.

Lightning during Hurricane Harvey sent a power surge through my house killing both a/c units. Stalwart provided fair pricing and great service. I would recommend these guys to anyone. Most difficult part was dealing with my insurance company

This company gave very good service. Also, he fixed another problem I had over the weekend at no extra charge. We highly recommend this company.

Stalwart really impressed me with their fast service and honesty. Walter was great. He immediately diagnosed the problem, fixed it in about 5 minutes, and answered all my questions. He encouraged me to ask as many questions as possible to keep him (and other service providers) honest. He told me exactly what I needed, and did not try to sell me expensive repairs that were not needed. He also told me they are redeveloping service packages that give customers more of an incentive to use the tune ups, helping to save money and save the life of the AC unit. So, Im always skeptical since I got taken advantage of with an air duct cleaning service, but Stalwart and Walter were the exact opposite...have a life time customer b/c of my experience with them.

Walter was professional, courteous and knowledgeable. Not only did he fix the issue we called about, he also fixed past issues not addressed by others. Highly recommend.

I called this company a few months back in regards to my secondary A/C drain pipe leaking. We have had A/C problems before. This company first did not mind quoting a potential price over the phone. Most companies wont do that. But to make matters even better, Walter was the most thorough and professional A/C gentleman we have ever dealt with before. He even took pictures to show us what the ultimate problem was. He truly is the definition of professional. I would trust him again if any A/C problems happen in the future. Hopefully not though 😉Thank you Walter

Mr Atto A/C work and heating service is very great, every work he does for me is perfect and with great care and consideration. He even gives me preventive instructions. I rate him 5 stars for professionalismand accurate neat work, he has been servicing my house for the past 6 yrs and I am very happy with his promptness and great skill at what he does, I will recommend him to all my neighbors.

I highly recommend this company to anyone that needs heating and air work. This company is very helpful and works with their customers. They are certfied and very knowledgeable in their work and are willing to explain everything to you. Call them, they are great!

Shopped around for new coil and condenser outside unit...Ato did a walk through came back with professional and explanation statement with a reasonable quote ...installation took place following week with his team did a good job and amazed on how they relocate the entire unit system up in the attic to have better access with maintenance without extra cost...Fantastic job Ato!!! Everything is running fine after three months installation and looking for your next inspection....trusting your work and great to see efficient and professional company.

Professional, reliable, courteous and outstanding job!!! Best price too! I highly recommend this company.

These guys are great, same day service, reasonable prices, were very professional from the dispatcher that took my order to the gentlemen that came out to repair my a/c, all around the best service Ive ever had from an a/c company

When you have something go wrong with your home--especially your AC in the dead of summer, you want to call someone you can trust...Stalwart Mechanical Services provided peace of mind and comfort for me and my family. They have limited reviews but 100% 5 Stars. Everyone in my situation is vulnerable and desperate. But Stalwart was fair and I can certainly appreciate Mr. Atos prompt response and ability to fix the problem the same day. His prices were fair and he didnt try to offer me more than what was needed. I cant thank Mr. Ato enough for how quick and efficient he was.

Ato came within the hour and was able to find the issue (Wires inadvertently touching which blew a fuse) with our upstairs unit in less than 7 minutes. Very professional as well....all the way to putting the covers over shoes as not to mess up the carpet!

Great service and quality of work, walter was great!! I highly recommend them..

Simply put, Ato was great! I highly recommend this company. After reading the reviews they were spot on! Ato called me before he came and arrived on time! He diagnosed the problem within minutes. He also educated me as he was servicing my unit and gave me tips going forward. I will be using this company from now on.

Ive used Stalwart a few times now, both at home and my business. I have had a very good experience with them on each occasion. Their dispatcher is friendly and helpful, the technition (Walter) is knowledgeable and professional, and their pricing is fair. Their quotes beat a few other big names in town. I will continue to use Stalwart Mechanical for my air conditioning and HVAC service needs, and I would highly recommend them to anybody else.

I would and have recommended Stalwart mechanical for your A/C or heating needs. When our unit went down it was Friday night, Ato came out the next day to diagnose the problem. We decided to replace the entire unit inside and out. Him and his crew installed everything on that Sunday and had us back up.and running. They were very meticulous on keeping the area clean in the house where they were walking back and forth. The small things like this is what impressed me and we have called him out since to add returns throughout the house.

Stalwart Mechanical is the best HVAC company in Houston. They are professional and fast. most of all his price was fair.

Ato cam out to meet me within a hour of calling and did an excellent job of repairing my a/c and at a very reasonable price. I highly recommend!

Stalwart is the best! They are friendly, reliable and honest.

I highly recommend this guys, they know what they doing and the price are accessible

Very good service and installation of my new unit.Ato and his crew did a knockout job and in a timely manner. Any one who chooses this company will not be going wrong.Thanks

They do a really good job when they come out and they are very reasonable. I plan to use them from now on.

Everyone at Stalwart has been fantastic! Walter came out to do a same-day initial inspection on a failing AC unit, and walked me through everything he was doing just to help me learn. The diagnosis of a leaking box coil was followed by three options for repair, either fixing just the coil or two options for a new system. The entire process was low pressure and high information. Going with a new system made sense, and once I made the call they were out the next day and did a great job swapping out the whole HVAC system. Otto even pointed out a very small gas leak at my meter and helped me get CenterPoint out within the hour to fix it. Overall just a bunch of good, talented, honest technicians earning my trust and business. (Office staff was great as well!) Solid company.

I called this company when my AC gave out on my family in the hottest part of the summer.Alot of the other companies tryed to take advantage of us in this time, not this company. The whole process was smooth.. This company has integrity and compassion for their customers. Mr Walter was straight forward and very helpful. I could not speak enough good things about this company. Thank you soooo much for all the help and getting our AC back up and running... Its too hot to be without AC.

I highly recommend Ato for all your Air Conditioner needs..he is very reliable & extremely knowledgeable, a well as the best prices around Houston.

Good service I recommend this company for a.c. jobs

I happened upon this review board while searching for someone to come out and troubleshoot my home ac system.I was highly impressed with how quickly the problem was diagnosed and resolved. I will be referring Stalwart to everyone I know.

Back in late May our unit was blowing warm air throughout the house. We decided to look in the Best Pearland Coupons magazine and came upon Stalwart Mechanical Services. I called Stalwart Mechanic and spoke with Ato...he and his team arrived on a Tuesday and completed the job above and beyond our expectations.Ato and his team are profession, courtesy and honest. I would recommend them to anyone who is looking to get their Air unit serviced.Im calling StalwartMech back out to install a air vent in my media closet.

They came out on time, were professional and fixed the AC issue quickly. Not much more you can ask for.

It is very rare I take the time to write a review, especially for AC contractors who are notorious for over-charging and below par work. Ato has demonstrated the highest level of integrity! He is a fantastic AC man and works hard to please his customers. I have a wife and three daughters so keeping the house cool is a must! Our AC went out on Friday night and I called Ato on Saturday morning. Ato carefully analysed my system and gently gave me the bad news. I gave Ato the go ahead on the new system and his crew were on the job Sunday morning at 8:30AM. They worked non-stop until 2:30PM and I had a new system blowing cold air. I am very happy with Ato and Stalwart Mechanical Services! Without a doubt, I will recommend his services to anyone in need of an honest and very dependable AC man!

Ato is a person you can trust. He tells you the honest truth about your situation and doesnt make up things just to get your service. He has been my A/C service guy for years and has always done a great job. My 15 year old unit finally meet its match and Ato got me a great deal on two new units. He and his crew came in in the morning and finished before the evening. My house cools much better now and it is more efficient. Last year my August Bill was $400.00 and after replacing the units this year my August Bill was $191.00 (3,800 s.f.house). They not only replaced my units and condenser coils but they corrected the ductwork that the previous A/C guy did at no extra charge. I highly recommend Mr Ato to anyone: Ive already recommended him to my brother and other friends.

I cant say enough good things about Ato. My parents recommended him to me and I have since recommended him to several people. He is thorough, professional, reliable and trustworthy. A friend of mine noticed my air conditioner wasnt working while I was out of town. She was house sitting so I immediately called Ato. He came out that evening and easily fixed the problem. There was dirt that was getting kicked up into the unit by wind and basically the unit just needed to be washed off. Once that was done it turned right back on! After seeing so many horror stories on places like Rossen Reports its nice to feel like someone was honest and didnt take advantage of me. The fee was nominal, not even the price of some trip fees. I will always use Ato and recommend him to everyone I know.

Nothing but positive things to say about this company. honest and staight forward.

Two Words Excellent Work!!!!

Prompt, thorough, and honest!