The distinct advantage of direct-fired heat technology is that it provides 99% fuel efficiency. Air comes in direct contact with the process of combustion for max heat output. For every $1.00 spent on fuel, direct-fired heat technology is designed to convert $0.99 to heat output. L.B. White was the first company to innovate enclosed flame portable heat technology. Enclosing the process of combustion separates the flame from the environment while still providing 99% fuel efficiency. By enclosing the flame and adding a fan to the design, L.B. White enclosed flame Premier® heaters can also be ducted from point A to point B for added flexibility in application.
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Premier/Foreman Decibels Flyer