Direct Gas-Fired Kilns in the South

The strong demand and premium prices for dry lumber, together with the move on the part of sawmill, operators to produce finished products which they can sell retail, is leading operators in the South to look toward kilns as a fast and profitable method of drying lumber. Steam kilns are in use at present, but not all plants can install the expensive steam kiln, so interest has turned to the use of gas-fired kilns. Gas-fired kilns can be classified by the method of air circulation (either natural or forced draft), method of heat application (either manifold system, vented inside or outside the kiln, furnace outside with blower to force heat, or open urn-type burners on gas lines inside the kilns), and method of humidity control (either steam, water sprays, or nothing). Details are given of operation of these types of gas-fired kilns along with operating costs, temperature control, and other problems.

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