Sol Solutions is a trust worthy company and stand by their product and service. After the installation of the solar fans, we encounter some irritating noise and I called the company about the problem. They responded without delay. We are very pleased with the work done by Chris and his associate today. First they went up to the attic to check out the installation to identify what could have been the irritating noise. Then he reinforced the installation with a piece of insulating material. With both fans off, I could still hear the noises. He immediately realized that the noises were not from the attic fans. Then they worked on the fan at the crawl space and realized that it was attached to one of the house floor joists. He reinstalled it and to mount it to a vertical beam. With all the fans running, all the irritating noises were gone. Good job Chris, we really appreciate it. I have to compliment Chris for his friendly and very courteous manner. When the work was completed everything was placed back to it original location. I will not hesitate to recommend Sol Solutions to our friends.