Very professional. Spent time to explain the process. Friendly and knowledgeable. Glad to have…read morethis service done right.

Andgar was the original contractor for our office HVAC, but once individual office walls were…read moreerected and furniture/cubicles moved in, the airflow and climate control went completely out of whack. People in their offices are sweltering and those in cubicles are either freezing -- wearing coats, hats, and blankets indoors -- or sweating and stripping off layers. These temperature extremes are only 5 to 10 feet apart. Also, the system for regulating temperature and fans is clunky: thermostats near a vent actually operate vents across the room and they're not very intuitive. It takes an engineer to program it, and I work with engineers. We're still freezing/sweltering. Makes no sense. Anyway, just wanted to put my 2 cents in while my fingers still have feeling.

I had Barron install a new 96% efficient furnace and AC system. There were some positives to the…read moreexperience, but there were also several details that left me disappointed, especially considering the cost of a full HVAC installation. The installation team reconnected vents to the master and guest bedrooms and repaired a crushed return line, which I appreciated. However, I noticed the repaired return had multiple unsealed screw holes. While I can seal the visible holes myself with silicone, I have no way of knowing if there are additional leaks on top of the ductwork that I cannot see. More importantly, sealing those penetrations should have been completed as part of the installation. They actually sealed the seams where the old meets the repair. Prior to the installation, we discussed running the refrigerant lines adjacent to the existing HVAC chase. Instead, the lines were run on the opposite side of the hallway and continue through the middle of the laundry room. It's not the end of the world, and the system still functions, but it creates a much bigger challenge to conceal the lines and significantly lowers the ceiling in that area. I was also instructed to pour a concrete pad with minimum dimensions of 18" x 36", so I went above and beyond and poured a 24" x 40" pad to provide extra room. During installation, I was told the actual required dimensions were 36" x 36", which resulted in the installer placing a foam pad over the concrete pad. This could have been avoided with more accurate communication upfront. To bring the new system up to code, two vents needed to penetrate my single-membrane roof. Prior to performing the roof penetrations, Barron informed me that they were not qualified to seal the penetrations. While I appreciate the transparency, this information came only after I had already paid a 50% deposit and committed to the project. This left me responsible for finding and hiring another contractor to complete a very small roofing job. Finding someone willing to take on such a minor project has been frustrating, and two weeks later I am still waiting for the penetrations to be properly sealed. I understand that HVAC contractors may not perform specialized roofing work, but this should have been identified during the estimating process so the project could have been properly planned and coordinated before I committed to the installation. Overall, the equipment appears to be good, and there were aspects of the installation that were done well. However, the lack of communication, attention to detail, and coordination between trades turned what should have been a straightforward HVAC replacement into a frustrating experience.

Per my wife, Barron's website advertises that they can replace knob-and-tube wiring. When she…read moreasked for an estimate, she was told that they cannot do knob-and-tube wiring replacement and to contact an electrical contractor. I would think that an electrical company would be an electrical contractor. Anyway, we will never contact them for ANY electrical work.

Aaron is a great guy, and was super efficient with troubleshooting the motor repair for my natural…read moregas furnace. Trouble located, motor removed, part ordered, insurance company contacted and repair complete in under one hour of MY time (two visits under half hour each). While at my home, I found Aaron friendly and conversant, and careful of his impact in my super clean space. He keeps his tools and work vehicle clean and organized. Four Seasons was the second contractor called for my repair, after I learned that my appliance insurance policy uses his service. The first company I called suggested the wrong repair and even suggested the appliance was old enough parts may not be available, and that I might need a whole new furnace! All for a seized up motor. Thank goodness for Aaron's honest expertise!!

Honest. Prompt. Caring. Great workmanship with attention to details. He left the job site cleaner…read morethan he found it. I give 4 Seasons my highest recommendation.

I had a great experience working with DiMax to add AC to my home this year. Serge was very…read moreresponsive and detailed in helping me figure out the best option for my split level house. Once decided the project unfolded quickly & easily, and they left everything super-clean. The system is a true upgrade to my home and I was especially happy during the heatwave! (Thank you Serge) Highly recommend.

I need to revise my review as I did call Dimax and never got a call back to fix my heat pump which…read moreI eventually was fixed by another company. There was a misunderstanding as we talked on the phone then he told me to text address and model to +1 (360) 296-1944 which I did on January 16th at 9:13am. Says delivered but for some reason he didn't get it, as I waited 48 hours as he says it would probably be the next day from my 9am call, for him to take a look at it. I was upset that he didn't get back to me but I have no complaints about his work as he did an excellent job for me previously and was Johnny on the spot. Just a communication breakdown unfortunately!!

I originally called Clean Air to check out an old scary pellet stove in a house I just purchased…read more They came out and did an inspection, free of charge, and then reasonably said "we can't fix this" (it was super old and rusty and definitely not going to be safe) - and so we discussed options. The guy worked through some different heating options with me, since I wanted to replace the old baseboard heaters. After we settled on a mini split heat pump, he stayed and took some measurements and we came up with a quote on the spot, considering the different pump sizes, brands, and layouts. They then worked with me to get the financing to make it possible. The installation for 2 outdoor units and 3 heads was done in a single day, and then another day for the electrical work to hook up. The crew was very nice and respectful of my space. Unfortunately some control wires got crossed during the installation (so the coolant was going to the wrong unit) and it took me a while to diagnose why the temps were so weird between the two units upstairs. But once I called and asked about it, they came right out and fixed the issue and it's been working great ever since!

Not a customer, but a neighbor of a customer. There was no reason why their van had to be parked on…read morethe sidewalk, but it was. This sidewalk connects two sections of a heavily-used recreational trail, but because it was parked on the sidewalk, people had to walk into the street to get around it. Lots of elders in this neighborhood use that sidewalk for their exercise. There isn't a sidewalk on the other side of the street that people can use instead. I contacted the company via FB to let them know, but got no response. I'd waited an hour before posting here hoping that my FB message would prompt them to move it. Didn't happen. It was parked there for at least an hour before I went to FB. I know who I WON'T be calling for HVAC services. Rude, y'all.

I was charged $232 just for the serviceman to show up at my door. The labor and parts for the…read morerepair were an additional charge. $500 bill for a fan relay switch. I have used them before, and they were reasonable. Not so now. And don't bother to try to call them to discuss the bill. I just paid because I gave up. I don't think they ever heard what I was saying. I felt I was ripped off BEFORE they even got there. I was charged an hour's worth of labor for a 15-minute drive. I'm an old man living on Social Security, but even if I were rich, $232 was WAY TOO MUCH to pay before they even set foot in your door.

Instead of insisting that I needed a whole new heat pump, air handler and furnace, they found what…read morewas wrong and repaired it. Very honest and professional.

Mumm's does the heating/cooling for all the homes which are being built in our new construction…read moreneighborhood. We went thru a record setting cold snap followed by 3 days of snow which is when our 6 month old heat pump stopped coming on this morning. I'll be honest - I expected whoever answered the phone to be surly and not that helpful. Instead, Rachel answered and was not only kind but encouraged me to try something and then call back and let her know. The system continued throwing an error code and I was expecting a long wait time for someone to be able to see us. She got a tech out right away. Not only did he get the issue fixed but is working with the manufacturer to make sure there isn't a bigger issue going on. I know right now there's a lot of demand given the cold temps and issues people have had. Mumms showed their true colors by being friendly and motivated to get it fixed quickly. To me, that says A LOT about them as a business. Thanks Mumms!

From the owner: With years of experience, Mumm's LLC brings a wealth of expertise to handle all your heating and…read morecooling needs. Whether it's installations, repairs, or maintenance, their skilled team has got you covered.Local Commitment: As a local business, Mumm's LLC takes pride in serving the Bellingham community. They understand the unique climate challenges of the area and provide tailored solutions to keep your home comfortable year-round. Quality Service: Mumm's LLC is dedicated to delivering top-notch service. From prompt responses to transparent communication, they prioritize customer satisfaction at every step.