The fundamental purpose of installing a fan shed is to accelerate the safe loss of moisture in green lumber. Simply put, this process involves forcing air through lumber which has been placed upon sticks. By controlling the fan operation, the user is able to regulate the loss of moisture in the lumber, thus, minimizing time spent in drying the lumber to the desired moisture content.

Pictured on the left is a fan section consisting of nine 5 H.P. Heavy Duty service motors. By controlling individual sections of the fan shed, several different species or thicknesses can be air dried simultaneously. With the added flexibility of the Interval System, any variety of loads can be prepared for the kiln drying under the same roof. Equipment as versatile as the Interval system not only accelerates inventory turnover, but offers cost savings while incorporating the best technology available.

For lumber operations which do not have the luxury of drying their inventory from dead green, fan sheds offer the most practical solution towards accelerating the drying process.

While some manufactures have continued to produce fan sheds which perform no differently than those of yesteryear, Wooddryer System has successfully interwoven both forward thinking and proven technology into the manufacture of fan sheds.

With the introduction of frequency controls into the air drying process, fan sheds became more flexible. Sheds which had been utilized for drying only similar species (Red and White Oak, Ash, and Walnut or Poplar, Cottonwood, and Basswood), became adaptable to a broad range of lumber. By controlling the fan speed, fan sheds could be adjusted to dry each individual load of lumber as required. It was with this advance that fan drying demonstrated both its present and future value to the market.

Wooddryer System has taken this technology to the next level with the introduction of the "Interval System". Though frequency controls marked a step forward in air drying technique, certain systematic drawbacks became apparent. First, by lowering the volume of air passing through lumber, "wet" zones become inevitable and the result was an uneven moisture spread across the load. Second, frequency modulators significantly increase both the initial investment and future maintenance/repair expense. The Interval System addresses these shortcomings effectively while providing unsurpassed results.

The Interval System utilizes common sense solutions to fan shed problems. As air takes the path of least resistence, consider the following: if high air volume is forced through lumber packs, air flow is sufficient to reach and effect the entire load equally. As opposed to the above, consider a situation with low air volume: the air flow will choose the easiest avenue, leaving insufficient air velocity to force itself through the least accessible corridors. The Interval System design creates air flow which produces uniform drying across an entire load. The reason high air velocity was avoided in the past was due to genuine fear of surface checking. However, once Wooddryer System developed a method of controlling moisture loss, even slow drying species such as Oak and thick Cherry proved reliable results could be consistently obtained with respect to improved drying time and lower degrade.