HVAC Improvements at Grissom Elementary School

Work Included: Provide HVAC and exhaust systems installation and modifications as outlined herein and as needed for a complete and proper installation including, but not necessarily limited to: 1. Furnish and install gas heat/electric cooling roof top units with curbs. Provide systems complete with insulated supply and return ductwork, air devices, balance dampers, fire dampers, smoke dampers, smoke detectors, interlocks, vibration isolation, air filters, and additional items required for a complete and fully functional system. 2. Provide refrigerant mini-split system with fan coil units, heat pumps or cooling only condensing units, refrigerant piping, supply and return ductwork, air devices, system controls, throwaway air filters, and all accessories required for a complete and fully functional system for areas identified on the drawings. 3. Building design shall include building pressure balance system to provide building pressure relief but still maintain building at slightly positive pressure. 4. Provide thermal and acoustical insulation for supply, return, and outside air duct systems. Ductwork shall be wrapped, except immediately at the unit for a minimum of 10ft. from the unit where the duct shall be lined with acoustical 3 pound density, 2 inch thick liner. 5. All air systems shall be balanced to the designed air flows by a NEBB certified contractor. Balance procedures and reporting shall be per NEBB Standard methods and procedures. 6. Provide building heating and cooling load calculations for determination of equipment sizes to be installed in each area to the owner for review and approval, prior to ordering equipment. 7. Mechanical contractor to furnish and install a “Supco” low pressure switch #SLP 0530 and a “Supco” SF 9602 ¼”MPT x ¼”MPT x ¼”FPT brass tee installed on high pressure side of all new and existing DX systems, RTU, and split systems. Wiring to alarm system by alarm contractor. 8. Demolition: • Disconnect, remove, and prepare existing systems for completion of the Scope of Work of this section as shown on the drawings and as affected by other sections noted herein. • If pipe, insulation, or equipment to remain is damaged or disturbed, remove damaged portions and make repairs. • Work abandoned in place: Cut and remove back to system main. Cap piping and patch surface to match final finish. Permanently mark all work abandoned in place and not operation. • Removal: Remove equipment and materials from the Project site to approved location daily. • Required disconnection or interruption of existing building systems shall be coordinated with the Owner prior to performing Work. All buildings users and departments affected by the interruption shall be notified as directed by the Owner within the time frame required by the Owner.

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Heating, Ventilating, and Air Conditioning (HVAC), Instrumentation and Control for HVAC, HVAC Air Distribution, Central HVAC Equipment.