I got the two AC units and dryer vents cleaned. The team worked with good coordination between them. They showed the picture of the unit before starting to clean. The job was well done. I think pictures of the AC unit after they cleaned would be helpful and reassuring.
When placing the order for the service, they did not mention that the mildew treatment would be extra. In a city like Houston, mold is always expected and this should be mentioned upfront rather than charging extra when they arrive for service.
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