Stephen Hamway
The Bulletin

In addition to his work for Guarantee Cleaning Services, a carpet and air duct-cleaning service that he began in 1998, David Hart has pioneered several manufacturing products as the founder of the Bend manufacturing company RamAir International Inc.

“I’ve always been a real science and tech geek,” Hart said.

This innovative spirit helped him create a duct-cleaning system in 2008 through RamAir that has been distributed in 10 countries, and it led him to his most recent invention: the OzoGen 10kV High Output Ozone Generator, which emits more than six times more ozone, Hart said, than the most popular generator in its class.

Hart said the generators are used by property management and disaster restoration companies, which restore buildings after fires or natural disasters. By generating ozone — a molecule with three oxygen atoms — the generators help remove persistent smells from buildings.

“You can’t have a restoration company and not have ozone,” Hart said.

A primary component of smog, ozone is considered a lung irritant, causing coughing and shortness of breath, according to the American Lung Association’s website. In October, the Environmental Protection Agency updated its air quality standards to limit the acceptable amount of ground-level ozone to 70 parts per billion. Hart said his product is primarily intended for cleaning large, unoccupied rooms, though he added that some of the health concerns are overblown.

“It’s a mild, mild irritant,” Hart said.

Hart began trying to build an ozone generator about a year ago. He reached an output of around 4 grams of ozone per hour, a common output for industrial generators.

“I’m making what they’re making,” Hart said of other manufacturers. “Let’s see if I can make it even better.”

Hart’s eventual product, which weighs 10.3 pounds and is slightly larger than a loaf of bread, emits 16 grams of ozone per hour, which he said was only matched among readily available products by much larger machines. Hart said his design uses different materials than many competing generators to emit several times more ozone. The higher level of ozone emission allows the OzoGen system, which retails at $1,495, to remove odors more quickly than other generators its size, Hart said.

Today, RamAir has a patent pending on a component of the generator, and is working with local companies, including CLS Fabrication and Cascade Graphics in Bend, to manufacture individual components. While Hart is still seeking distributors for the generator, he said it would be available in Canada, Mexico, England, Australia, Brazil, Argentina, Dubai, China and Singapore, the same countries in which RamAir’s duct-cleaning system is currently available.

“We’re geared up to sell this all over the world,” Hart said.

To make sure his claims about the product were scientifically valid, Hart enlisted the help of Zelda Ziegler, chemistry professor at Central Oregon Community College. Ziegler met with Hart earlier in the fall, and said she was impressed by the portable generator.

“He’s trying to compete; he’s enthusiastic, and he has a really good product,” Ziegler said.

— Reporter: 541-617-7818,