Mechanical Quality Assurance Checklist
Predesign
- All required deliverables submitted
- Class C mechanical systems cost estimate accurate and correct
Schematic Design
- All required deliverables submitted
- Mechanical system(s) appropriate for the structure
- Energy analysis and life cycle analysis for mechanical systems selection accurate and correct
- Design narrative includes descriptions of all proposed mechanical systems (HVAC, plumbing, fire protection, fuel systems, etc.)
- Class B mechanical systems cost estimate accurate and correct
Design Development or 50% Design-Build Construction Documents
- All required deliverables submitted
- Mechanical equipment locations thoroughly coordinated with architectural and structural
- Main ductwork and piping runs thoroughly coordinated with architectural and structural
- Outline specifications for all proposed mechanical systems
- Heating and cooling load calculations accurate and correct
- Plumbing design calculations accurate and correct
- Fire protection design calculations accurate and correct
- Revised Class B mechanical systems cost estimate accurate and correct
100% Draft Construction Documents or 100% Draft Design-Build Construction Documents
General
- All required deliverables submitted
- All required specification sections provided
- Equipment and materials conform to NPS standards
- Housekeeping pads provided for all large floor-mounted equipment
- Adequate access space for equipment servicing and adequate pull space for filters, tube bundles, motors, etc. provided
- Catwalks, walkways, mezzanines, etc. provided for access to equipment
- Access doors provided as necessary for valves, equipment, trap primers, water hammer arresters, etc
- Access door locations coordinated with architectural
- Louvers, vents, hoods, etc. on exterior of building coordinated with architectural
- Louver blankoffs coordinated with architectural
- All necessary isolation valves shown
- All low point drain valves shown
- UL approved closure systems where piping penetrates fire rated assemblies
- Seismic restraints for tank type water heaters, hot water storage tanks, expansion tanks, equipment, piping, etc. in seismically active areas
- All mechanical systems power requirements thoroughly coordinated with electrical
- Specifications thoroughly coordinated with drawings
- Class A mechanical systems cost estimate accurate and correct
HVAC
- HVAC systems designed to conform to all applicable codes and standards
- Combustion air provided for fuel-burning appliances
- Proper clearances to combustibles provided for fuel-burning appliances
- Proper venting provided for fuel-burning appliances
- Ventilation air provided per ASHRAE 62
- Restroom ventilation systems provided (unless operable windows or other passive systems can provide required ventilation function)
- Ductwork and damper arrangements for air side systems correct
- Ductwork sized correctly
- Fire dampers where ductwork penetrates fire rated assemblies
- Combination smoke and fire dampers shown where necessary and coordinated with electrical
- Duct smoke detector locations shown and coordinated with electrical
- All necessary air vents shown in hydronic systems
- All balancing valve locations shown in hydronic systems
- Proper air control and system pressurization shown for hydronic systems
- Anti-freeze and anti-freeze makeup systems provided for hydronic systems that have a high probability of freezing or will be seasonally operated
- Adequate pressure rating for boilers
- Pressure setting for pressure relief valves correct
- Piping and pumping arrangements for hydronic systems correct
- Primary/secondary pumping arrangements provided for multiple boiler installations
- Properly sized diaphragm type expansion (compression) tanks for hydronic systems
- Chemical feeders (pot type) provided for hydronic systems
- Sound attenuation measures provided where necessary
- Adequate vibration isolation provided for pumps, fans, and other rotating or vibration producing equipment
- Condensate drains with vented traps shown for all cooling coil condensate drain pans
- All control device locations shown (thermostats, switches, sensors, actuators, control panels, etc.)
- Control system diagrams coordinated with what is shown on the plans
- Control system points list accurate and correct (DDC systems)
- Control systems sequence coordinated with what is shown on the plans and what is shown on the control systems diagrams and points list
- Control systems logic coordinated, correct, and unambiguous
Plumbing
- Plumbing systems designed to conform to all applicable codes and standards
- Building domestic water and sewer services coordinated with civil utility plan
- Pressure reducing valve(s) installed if water supply pressure > 80 psi
- Booster pump(s) provided as necessary to maintain a minimum of 25 psig at the furthest plumbing fixture at design flowrate conditions
- Water meters on domestic water services of each building
- All fixtures properly trapped and vented
- All necessary cleanouts shown
- Trap primers or "trap guards" provided for infrequently used floor drains
- Low-flow fixtures and fittings specified
- Sump pumps and sewage ejectors where necessary
- Combustion air provided for fuel-burning domestic water heaters
- Proper clearances to combustibles provided for fuel-burning domestic water heaters
- Proper venting provided for fuel-burning domestic water heaters
- Domestic hot water expansion tank (if pressure reducing valves or check valves are installed on the domestic water service)
- Double-wall heat exchangers with leakage path open to atmosphere for indirect-fired domestic water heaters
- Proper discharge routing and termination for domestic water heater temperature and pressure relief valves
- Cross connection control (vacuum breakers on all hose connections, backflow preventers on hydronic system makeup water connections, irrigation system connections, etc.)
- Airgap fittings with outlets routed to floor drain or sink for all reduced pressure zone backflow preventers installed indoors
- Water hammer arresters provided for domestic water systems with quick-closing valves
- Exterior wall hydrants or hose bibbs
- Hose bibbs in public restrooms
- Hose bibbs in mechanical spaces
- Domestic water piping sized correctly
- Drain, waste, and vent (DWV) piping sized correctly
- Oil/water separators for floor drains in automotive repair facilities
- Secondary (overflow) roof drains or scuppers provided (if roof drains are used)
- Earthquake shutoff valves in fuel gas services in seismically active areas
- Gas meters provided in building fuel gas services (except where a single building is served by a single LP-gas tank)
- Primary-secondary pressure regulation on LP-gas vapor services
Fire Protection
- Fire protection systems designed to conform to all applicable codes and standards
- Proper hazard classification(s) used
- Building fire protection water service coordinated with civil utility plan
- Fire department connection and inspector's test valve locations shown
- Risers and floor control valve stations locations shown where necessary
- Locations of fire pumps and fire pump controllers shown where necessary
- Locations of pressure tanks, air compressors, nitrogen bottles, etc. shown where necessary
- Locations of standpipes and hose valves shown where necessary
- Locations of sprinklers coordinated with architectural reflected ceiling plans
- Double check valve assembly provided on fire protection water service
- Tamper switches for supervised valves coordinated with electrical
- Flow switches for sprinkler activation alarm(s) coordinated with electrical
- Piping and valving arrangements correct for fire protection systems
- Supervised control valves provided in branch lines feeding elevator machine room, elevator hoistway, computer network room, and telecommunications equipment room sprinklers
- High/low air pressure switches provided in dry pipe valve trim, connected to fire alarm panel
- Tamper switches on alarm silence valves provided in wet pipe alarm check valve trim and dry pipe valve trim, connected to fire alarm panel
- Provision made for flow testing of backflow prevention device at design flow conditions (bypass around fire department connection check valve with supervised shutoff valve)
Fuel Systems
- Fuel systems designed to conform to all applicable codes and standards
- Proper clearances provided between fuel storage tanks, buildings, ignition sources, and public ways
- Vehicular impact protection for aboveground fuel storage tanks
- Fire resistant (protected) fuel storage tanks specified for aboveground liquid fuel storage
- Overfill spill containers, overfill protection, secondary containment, fire resistant construction, continuous leak detection monitoring, tank level monitoring (inventory control), normal vents, emergency vents, vapor recovery, anti-siphon measures, etc. provided as necessary for liquid fuel storage
- Emergency shutdown switch provided for gasoline dispensing facilities
- Shear valves provided for vehicular fuel dispensers
- Containment sumps provided for vehicular fuel dispensers
- Vapor recovery provided for vehicular fuel dispensers as necessary
- Secondary containment with continuous leak detection monitoring for pressurized underground fuel piping
- Line leak detection system provided for pressurized fuel piping
- Excess flow valves, emergency shutoff valves, etc. provided for LP-gas fuel storage
- Adequate ballast and hold-downs for underground fuel storage tanks in high groundwater areas
- Adequate corrosion resistance or corrosion protection for underground fuel storage tanks
- Proper piping materials and piping corrosion protection to suit the particular fuel system application
100% Complete Construction Documents or 100% Complete Design-Build Construction Documents Submitted for Final Approval
- Required deliverables submitted
- All review comments from 100% Draft Review satisfactorily resolved