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    Mainline Plumbing and Heating

    5.0 (1 review)

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    2 years ago

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    Cool On Mechanical - When we're on the road

    Cool On Mechanical

    (17 reviews)

    Ricardo and his crew are professional and easy to work with. Ricardo replaced two A/C units in my…read morehome after they stopped working. His pricing ended up being more competitive than several of the larger companies I received quotes from, and Ricardo did a better job at answering my questions and explaining the thought process behind his recommendations. He is very thorough and does extensive testing after the work is done to make sure everything is in proper order. I would highly recommend Cool On to anyone needing HVAC service.

    Ricardo and his team should be teaching the class on customer service. He's an perfect example how…read moresmall family-owned businesses can outcompete larger organizations. This man will hustle and break his back to earn your business and build a relationship with his customers. He takes pride in his work. I cannot recommend this place enough. On a Friday afternoon, I reached out to ~5-7 vendors to assess a broken HVAC in a DC condo. Ricardo was able to come out IMMEDIATELY at 8PM on a Friday night. He did a quick dusting of the unit which hadn't been serviced in a while and even went to the roof as a part of his diagnosis. After sticking around for a couple hours trying to find the source of the problem, I was mentally preparing myself to pay a diagnosis and service fee, but there was no such thing. What signaled to me Ricardo was top notch was the fact that this man lives in Baltimore, easily a 50-minute commute from where I was in DC. He didn't leave until I was satisfied with his work until 930PM on a FRIDAY night. This type of service is difficult if not impossible to find. Ricardo patiently explained what the problem was, why I wouldn't have working AC after he would leave, and what my options were. He was very transparent with pricing, sent over a couple of quotes, and laid out what install schedules would look like depending on which manufacturer I went with. He and his team came in Tuesday and the install lasted about 7 hours. Fully working AC in less than 2 business days at a reasonable and competitive price. You cannot beat that.

    Delta T Freelance Heating & Air - Full HVAC replacement in Bowie Md $6,999.
 
 301-615-0737

    Delta T Freelance Heating & Air

    (5 reviews)

    The DMV had a super cold Winter season. Of course, my furnace decided to go out during this time…read more I made an appointment with Delta (a small family business) and Paul came out quickly and on time. Paul is an excellent HVAC technician. He performed a diagnostic test, explained my options, and had very reasonable prices and various finance options. Paul is not only professional but is smart, personable, understanding, and kind. Excellent company. My gas furnace is old, but after Paul fixed it, my home is warmer than before and works beautifully. My gas bill also reflected the cost of a well running furnace after Paul completed the fix. So happy to find someone who actually knows HVAC & does not just recommend replacing the whole system to avoid troubleshooting and actual work. Dealing with the office was an excellent experience too. Very professional and kept me up to date on everything. Great team. I am thankful for Delta T Freelance Heating Finally, I found a reliable, reasonable, high quality "GOTO" HVAC company. Could not be happier.

    Since having a new HVAC system and hot water heater installed by Delta T Freelance I have had…read moreissues with the heating in winter and cooling in summer. Both issues were shrugged off with, "Heat pumps aren't really made for this climate." Then, why did they sell me one for $11,000???? When the unit stopped cooling altogether during the recent heatwave, I finally got an answer to my texts and messages that said, "Sorry, but I can't help you. I'm on vacation in Orlando, Florida, and won't be back until next Tuesday." As I was trying to comprehend any business owner going on vacation without arranging for an on-call substitute, we agreed that Paul would call me on the following Tuesday, after he returned home. That would have been two weeks ago and my phone has yet to ring. I don't know, or care, if this lack of responsibility is due to confusion, subterfuge, or embarrassment, and frankly, I don't care. What I do know is that I cannot trust Delta T to perform their work without complications or with any honest attempt at service after the sale, as promised. Never, ever... for ANY reason... lie to your customers!

    Mainline Plumbing and Heating - plumbing - Updated September 2026

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