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HVAC system design is a subdiscipline of mechanical engineering, based on the principles of thermodynamics, fluid mechanics, and heat transfer. "Refrigeration" is sometimes added to the field's abbreviation as HVAC&R or HVACR, or "ventilation" is dropped, as in HACR (as in the designation of HACR-rated circuit breakers).
The equations for the use of the data retrieved from these tables are very simple. Q= heat gain, usually heat gain per unit time. A= surface area. U= Overall heat transfer coefficient. CLTD= cooling load temperature difference. SCL= solar cooling load factor. CLF= cooling load factor. SC= shading coefficient.
Construction estimating software. Construction cost estimating software is computer software designed for contractors to estimate construction costs for a specific project. A cost estimator will typically use estimating software to estimate their bid price for a project, which will ultimately become part of a resulting construction contract.
Common area maintenance charges ( CAM) are one of the net charges billed to tenants in a commercial triple net (NNN) lease, and are paid by tenants to the landlord of a commercial property. A CAM charge is an additional rent, charged on top of base rent, and is mainly composed of maintenance fees for work performed on the common area of a property.
Uniformat is a standard for classifying building specifications, cost estimating, and cost analysis in the U.S. and Canada. The elements are major components common to most buildings. The system can be used to provide consistency in the economic evaluation of building projects. It was developed through an industry and government consensus and ...
[2] [3] BSD is a software firm that is a leading developer of commercial master specifications and construction cost estimating software. BSD is involved in the development and maintenance of several of CSI format documents including MasterFormat , UniFormat , and OmniClass , all of which relate to specifications and cost estimating.
AFCAA REVIC is a set of programs for use in estimating the cost of software development projects. The Revised Enhanced Version of Intermediate COCOMO (REVIC) model is a copyrighted program available for public distribution under agreement with the REVIC developer, Ray Kile, and the U.S. Air Force Cost Analysis Agency (AFCAA).
Wrightsoft is a software development firm for heating, ventilation, and air conditioning ( HVAC ). Established in 1985, [1] Wrightsoft has served residential, commercial, and educational markets by providing HVAC design, specification, and sales software. [2] Wrightsoft is headquartered in Lexington, Massachusetts, USA .
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