Central Washington University CHCI Assessment Report 12-10-13
Sanitary Waste & Vent The existing sanitary waste and vent, and roof drain piping is constructed of no-hub cast pipe and fittings. The industry standard life expectancy is 50 years. The system is in very good condition. Fixtures and Faucets Many of the existing restroom fixtures and faucets are showing their age and will need replacement. General The mechanical systems at 20 years old are approaching their expected service life. This situation is exacerbated by a history of 24 hour a day/seven day a week usage associated with an animal holding facility. Consequently, the existing mechanical equipment should not be considered for continued use with any significant building renovation or change of building use. There may be some potential reuse of existing piping and duct systems but it is not expected to be significant and will be highly dependent on future program and building design. A significant renovation or change of use would require that the building be brought up to current standards which would include upgrade for ADA requirements, energy code compliance of the mechanical systems and building envelope and any potential life safety code issues. It should also be noted that the existing building has very good overhead volume greatly facilitating the installation of new and renovated mechanical systems Mechanical Equipment With very few exceptions, the mechanical systems located within the building are the original equipment and are in excess of 20 years old. Equipment/system service life is defined in ASHRAE Applications Handbook as the historical time during which a system or component remains in its original service application. Anticipated service life for pumps are 20 years, motors 18 years, controls 15 years, heat exchangers 24 years, water/steam coils 20 years, electric coils 15 years, fans 20-25 years, radiant heat 25 years and unit heaters 13 years. Most systems within this building are near or have exceeded their useful service life and have little residual value. Also, as mentioned previously, these systems are not only near the end of their economic life but have experienced very severe operating conditions given their 24/7 schedule. Heating The building heat is provided from the central plant high pressure steam system. Campus steam is regulated from 100 psig to 15 psig in the building. Low pressure steam is piped to the steam to hot water convertor and to a domestic water heater. Hot water from the convertor is piped to heating terminal units located throughout the building. Condition of the existing hot water pipe is not known. HEATING, VENTILATING AND AIR CONDITIONING (HVAC) SYSTEMS
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