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    Green Collar Operations

    4.7 (105 reviews)
    Closed • 8:30 am - 4:30 pm

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    Insulation around HVAC vents
    Mary W.

    Prompt, Neat, Courteous.... Installed as promised...yes we recommend and would use again.

    Scott C.

    Have used them twice - problems each time. Pre-sales is great (Bill Cook), but seems they contract the work out to the lowest bidder. No quality control after they have your money. First time - had a plenum box replaced at an old Hyde Park house. No one living there. They opened the attic access and left it open for days. When they finally showed up and replaced the plenum, they left the old in the attic along with any other trash including lunch! I called and Green Collar came out and cleaned it up. This is just a plenum replacement on a small unit! 3200 sq ft house in Dripping Springs. They completely replaced the ducts, blew in insulation, and basically redesigned air distribution (big bux!). There were immediate problems with some rooms freezing and some very hot. They sent a guy out to assess. We were told it was air distribution and was shown how to adjust the flow. There were no changes to the problem so we called again. This time we were told that we were going to be charged for a service call. After arguing with the co-owner, she agree this would be the last time for a free visit to fix. Only about a month had gone by to this point. Guy came the second time, readjusted air flow again, noticed some of the new ducts were ripped, and basically said good luck. We have lived with it for about a year thinking the new air distribution plan had flaws. Last week we had a HVAC company show up for unrelated issues. They went into the attic an immediately saw very clinched, pinched, and misrouted ducts (see pics). They fixed and all of a sudden the rooms that were hot for a year now are cool! They explained how the restrictions on the new ducts was preventing air flow - the very reason we hired Green Collar to begin with. Someone else fixing problems that Green Collar should have easily found and rectified even before "we are finished" stage. Bill Cook is good. After that, you are dealing with the same old don't care, let's get it done, we have their money attitude in this unregulated business. Best advice is get an estimate from Bill and then go elsewhere to get Bill's plan implemented.

    The work (insulation & AC improvements) was performed Monday the 25th. You can see the immediate drop in usage.

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    15 years ago

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    15 years ago

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    Robert S.

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    12 years ago

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    Robert S.

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    10 years ago

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    13 years ago

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    12 years ago

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    9 years ago

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    12 years ago

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    16 years ago

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    12 years ago

    Very pleased. Thanks for the good work and lower utility bills!

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    Robert S.

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    12 years ago

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    Robert S.

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    11 years ago

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    10 years ago

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    8 years ago

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    9 years ago

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    Page 3 of 3

    Ask the Community - Green Collar Operations

    Review Highlights - Green Collar Operations

    “Rob and his entire team are true professionals and very conscientious about their work.”

    Mentioned in 25 reviews

    Read more highlights

    McCullough Heating, Air Conditioning & Plumbing - Locally owned since 1977

    McCullough Heating, Air Conditioning & Plumbing

    (213 reviews)

    Michael M was absolutely outstanding! He was knowledgeable, professional, and kept me informed…read morethroughout the entire service call. He took the time to explain the problem in detail, what was needed to fix it, and how long the repair would take. I always knew what was happening and what to expect. What really stood out was Michael's genuine focus on customer service. He was friendly, personable, and clearly cared about keeping my family comfortable. While the repair was being completed, he even brought in portable units to help keep us cool. Michael did exactly what he said he would do and completed the work when he said it would be done. His communication, professionalism, technical knowledge, and commitment to his customers were exceptional. Great technician and an excellent representative of the company! I highly recommend this company for any HVAC service needs.

    McCullough's technician Sam repaired our AC system with expert problem solving and efficiency;…read moreclogged water line caused system to shut down. Having McCullough's comfort contract we were not charged for the visit and analysis. We did pay for labor to cut and flush the waterline and install an access coupling. Sam proposed two solutions, explaining both clearly; showing photos of each way to have future access to flush the water line if needed. His professionalism , expertise, efficiency and clear explanations were much appreciated. This repair reinforced the value of keeping McCullough's comfort contract (2x/year inspections) for Heat and AC maintenance visits including emergency servicing; much needed in 90°+ heat.

    Green Collar Operations - hvac - Updated October 2026

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