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The author provides tips to mechanical engineers on designing heating, ventilation, air conditioning and refrigeration (HVACR) units. He suggests giving proper consideration to adequate duct and pipe insulation based on current energy code requirements. He recommends reviewing, testing and finalizing the sequence of operation of the building system software program prior to demonstrating the system performance to the commissioning team/

Provides tips on designing a heating and ventilating system in the U.S. Need of referring to the 2004 handbook of the American Society of Heating, Refrigerating and Air-Conditioning Engineers; Control on the occupied mode of operation; Compliance of the engineers on the specifications of various contracts.

Provides guidelines for building heating and ventilation. Documentation of design criteria; Inspection of carbon monoxide levels; Energy measurement and trending.

Offers suggestions on providing tenant space heating, ventilating and air conditioning using variable air volume systems and fan-powered terminals. Overriding of the space thermostat; Setting of time-of-day clock to unoccupied mode.