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JACKSONVILLE, Fla. -- The jump in pollen count has increased the number of calls for duct cleaning services. But how do you choose the right company?

Thomas Cavanaugh suffers from allergies and decided to clean the duct system in his home.

"It has been miserable, right now I'm sneezing coughing, I've been sick twice since I've been in this house the past four months," said Cavanaugh.

He said he checked the Better Business Bureau rating of companies and talked to family members before choosing a company.

"I've got bad allergies and I know the people before had two dogs so all that hair and dust is in the duct work, I had to do something," he said.

Cavanaugh called weather engineers, the better business bureau rates the company A plus.

"Most allergist in Jacksonville refer us to their patients to have their system checked out," said David Hughes.

Hughes said when he gets a call for service he inspects the home and if the cleaning is not needed he tells homeowners it is not needed. If it is necessary they will clean and sanitize every component of the system.

"We use a vacuum that is sucking on the duct system approximately twice what the air conditioner blows," said Hughes.

Hughes said there are many steps to cleaning and sanitizing the system; he said consumers make two mistakes in hiring a duct cleaning company. They don't get a complete description of the work.

"If they're not getting in the attic they're not getting the entire duct system," said Hughes.

The second mistake consumers make is tohire a company based on its low price, without doing their homework.

"You're gonna spend $300 plus to get everything clean," said Hughes, "if it sounds too good to be true it probably is."

Hughes said you should also check to see if the company is certified by the National Air Duct Cleaners Association.

The Better Business Bureau has received 36 complaints about another company called Air Care Solutions. The BBB gave that companyan 'F' rating.

BBB President Tom Stephens said Air Care Solution advertise a low price for air duct cleaning but uses high pressure sales tactics to charge customers a high price.

We called Air Care Solutions and the company did not respond.