I've always thought that the "market" for used oil-fired boilers to heat swimming pools has gone untapped - even tropical hot spots like to take the chill off their 5-star pools!
See if Morris Mantey at CleanBurn www.cleanburn.com is interested.
Also Bill Diesslin at Iowa State University's Department of Health & Safety and I have discussed the project but it doesn't fit in with what I doing these days.
Call me for Bill's info!
Small Business Pollution Prevention Center
Iowa Waste Reduction Center
1005 Technology Parkway
Cedar Falls, Iowa 50613