Specifications include, but are not limited to: ● NO2 sensing capability needs to be added to the gas detection system. ● The air turnover and effluent capture efficiency within the service and parking areas could be improved by dropping the exhaust intake closer to the floor in additional locations. ● The temperature control for the radiant gas fired heating elements could be networked and staged with the primary ventilation heat recovery units to provide a more efficient use of the heating elements in both systems. ● The garage door unit heater should be replaced with a new non-ducted unit or a direct ducted gas fired radiant heating element with similar heating capacity. ● Combustion air for the gas fires radiant heaters can be provided either by direct ducting or with a much smaller ducted heating element interlocked with the operation of the radiant heaters ● The vehicle hose reel and welding exhaust fans should be rebalanced to produce original capacity, and motor function reviewed.