Dampers
Dampers are moveable metal plates in a flue or chimney, used to regulate the draught and control the rate of combustion.
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Deflection
Deflection is the amount an element or structure bends or ‘sags’ when a load is applied. Allowable deflection is generally expressed as a fraction of the span, in inches. All...
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Ducts
Ducts are conduits or passages used in heating, ventilation, and air conditioning (HVAC) to deliver and remove air. The needed airflows include, for example, supply air, return air, and exhaust...
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Durability
The durability of reactive materials may change significantly when exposed to specific weathering conditions. This change may result in a product not achieving the expected performance in the event of...