Cost Factors Did you know that the purchase price of an industrial or commercial door constitutes only 5% – 15% of its overall tangible cost? The other 85% – 95% includes costs such as passage time, energy loss and maintenance. In addition to the tangible costs, there are intangible costs associated with a doorway. These include the effect of the doorway on worker comfort and the quality of the product processed at the facility. In most cases, the intangible costs overwhelm the tangible costs but are difficult to estimate accurately.