Project Delivery Method: Integrated Project Delivery (IPD)

Owner Team: Local school department, internal owner representative, and facility manager (in-house staff)

Project Delivery Team: An IPD project manager, a mechanical-electrical coordinator, an equipment manufacturer technician, HVAC supervisor (in-house staff), HVAC supervisor (contractor), ATC technician (contractor), and operations and maintenance (O&M) technician (in-house staff)

Application: 2019 ASHRAE Handbook, Educational Facilities, Chapter 8

Project Type: Existing conditions and heating system failure

References: Internet browser search engine for temporary heating equipment, U.S. Occupational Safety and Health Administration (OSHA) 1926.54 on temporary heating devices, and OSHA safety manual, temporary heat

DESIGN INTENT DOCUMENT (DID)

• An unexpected heating system failure on the south side of a K-8, one-story series of classrooms resulting in no hot water heating to the perimeter. The school department, along with its facility staff, implemented an IPD project delivery method with a local heating company service department to provide temporary heat and ventilation to six classrooms for one week while the heating system was repaired.
• The IPD team followed the ASHRAE Handbook 2020, Chapter 1, “HVAC System Analysis and Selection” process as it pertains to space and occupational comfort and (IAQ), including the following:
  • Owner environmental health and safety (EH&S) program goals and additional goals
  • Process/system constraints
  • School safety and security program requirements
  • OSHA guidelines specifically drafted for temporary heating devices and safety
  • Emergency operating budget and project timeline schedule

• Existing Conditions:
  • The central air system supply and return air cfm to remain in operation serving the entire first floor of the building
  • Individual perimeter classroom unit ventilators with hot water heating coils with room thermostats
  • A failed perimeter hot water heating zone pump serving six classroom unit ventilators
  • Available utilities include electricity for permanent and emergency temporary power

• Provide temporary heat and additional ventilation to the classrooms for one week while a hot water heating system zone pump is purchased, delivered, and installed in place of the existing in-line circulator.

DESIGN CRITERIA DOCUMENT

• The HVAC design criteria shall be in sync with the project delivery method and the owner’s project requirements.
• The design criteria shall be based on maintaining space comfort and ventilation air using individual temporary electric heaters, two per room, powered by 208-3-60 temporary electricity.
• In addition to existing ventilation to classrooms, the school will use operable sash windows to supplement outdoor air previously provided through each unit ventilator’s minimum ventilation damper and louver.
• Rented electric floor mounted heaters shall be 2-20 kW, fan-powered, and with MERV-14 filters.
• Each classroom shall have a temporary space thermostat to serve the two electric temporary heaters, and the thermostat shall be set at 68°F
• The heating IPD contractor shall produce a conceptual scope of work as follows:
  • The contractor’s design engineer shall provide system flow diagrams showing the system repair work along with temporary heating drawings that show the electrical power wiring per code and the location of the two electric heaters per classroom.
  • This design engineer shall include electrical heater equipment data sheets as well as the new replacement hot water heating circulator.

Project Delivery Method:

• Design-Build (D-B)
• Integrated Project Delivery (IPD)
• Design-Bid-Build (D-B-B)

Owner Team:

• Local School Department
• Building Program Committee
• Internal Owner Representative
• Owner Representative (consultant)
• Project Manager of Capital Projects
• Facility Manager (in-house staff)

Project Delivery Team:

• IPD Project Manager
• Mechanical-Electrical Coordinator
• Equipment Manufacturer Technician
• Utility Company Representative
• Architect, Acoustical, Plumbing, Electrical, Structural, Fire Protection, and Security Consultants
• HVAC Supervisor (in-house staff)
• HVAC Supervisor (contractor)
• ATC Technician (contractor)
• Building automation system (BAS) Technician (in-house staff)
• Operations and maintenance (O&M) Technician (in-house staff)
• Third-Party Commissioning Consultant (CxC)
• Testing, Adjusting, and Balancing (TAB) Technician

Application 2019 ASHRAE Handbook

• Places of Assembly, Chapter 5
• Indoor Swimming Pools, Chapter 6
• Hotel, Motel, & Dormitories, Chapter 7
• Educational Facilities, Chapter 8

Systems and Equipment 2020 ASHRAE Handbook

• Air-Handling and Distribution, Chapter 4
• In-Room Terminal Systems, Chapter 5
• Condenser Water Systems, Chapter 14

Project Type:

• Existing Conditions
• Heating System Failure
• New Construction
• Renovation
• Infrastructure (central heating, cooling, and/or cogeneration)

References:

• 2017 ASHRAE Handbook – Fundamentals
• 2018 ASHRAE Handbook – Refrigeration
• 2019 ASHRAE Handbook – HVAC Applications
• 2020 ASHRAE Handbook – HVAC Systems and Equipment
• Internet Browser Search Engine

Other References:

• ASHRAE Standard 55 (Thermal Environmental Conditions for Human Occupancy)
• ASHRAE Standard 62.1 (IAQ)
• ASHRAE Standard 90.1 (Minimum Energy Standards)
• OSHA 1926.54 on Temporary Heating devices
• OSHA Safety Manual, Temporary Heat Safety

DESIGN INTENT DOCUMENT

• An unexpected heating system failure on the south side of a K-8, one-story series of classrooms resulting in no HVAC to the perimeter
• The IPD team followed the ASHRAE Handbook 2020, Chapter 1, “HVAC System Analysis and Selection” process as it pertains to space and occupational comfort as well as IAQ
• Owner environmental health and safety (EH&S) program goals and additional goals
• D-B process/system constraints
• School safety and security program requirements
• OSHA guidelines specifically drafted for temporary heating devices and safety
• Annual school operating budget and project timeline schedule
  

Existing Conditions:

• Central air system supply and return air cfm to remain in operation serving the entire first floor of the building
• Individual perimeter classroom unit ventilators with hot water heating coils and room thermostats
• Failed perimeter 2-pipe heating and cooling water zone pump serving six classroom unit ventilators
  

Utility Availabilities:

• Hot water heating system temporary distribution
• Electricity for permanent and emergency temporary power
• Provide temporary heat and additional ventilation to the classrooms for one week while a hot water heating system zone pump is purchased, delivered, and installed in place of the existing in-line circulator.

DESIGN CRITERIA DOCUMENT

• The HVAC design criteria shall be in sync with the project delivery method and owner’s building program requirements
• The design criteria shall be based on ASHRAE 60.2 and federal energy code compliance for outdoor air temperature compliance
• The existing HVAC systems serving the renovated offices and conference rooms shall be removed in their entirety, and a new VRF heating and air conditioning system shall be installed
• Utilities shall be 480/3/60 electrical power to serve two DOAS units, 75-ton units each sized with the new automatic controls shall be interfaced with the existing BAS system
• The air filters shall be pre-filter MERV-7 and final filter MERV-15, serving the new DOAS unit and MERV-14 fan coil unit (FCU) filters.
• The new automatic controls shall be interfaced with the existing BAS system.
• The low-velocity sheet metal distribution shall be reused
• Each office and conference room shall have its own programmable thermostat set at 68°F heating and 76° cooling in the occupied cycle and 60° heating and 76° unoccupied set points.