Westminster Branch Library Renovation

BKM provided MEP design for renovation of Westminster Branch Library located Carroll County, MD. The primary cooling and heating was provided by two air cooled variable refrigerant flow (VRF) systems with heat recovery.  The VRF heat recovery system shall allow for each space to be in either heating or cooling mode, independent of the mode of the neighboring space. The outdoor condensing units were located on a low flat roof of the existing library with refrigerant lines routed through the main library floor down to the basement ceiling and then distributed to the individual units. All individual spaces were provided with one or more indoor VRF units sized to meet the heating and cooling needs of those spaces. Outdoor air was provided to the space by an air cooled dedicated outdoor air system (DOAS). The commercial/teaching kitchen was provided with a Type 1 grease exhaust hood connected to welded and wrapped Type 1 grease duct and was routed to a grease exhaust fan located on the roof. Make up air for the kitchen was provided by a dedicated air cooled/gas fired make up air unit (MAU) located on the exterior of the space on the roof. Supply air ductwork from the MAU was routed through the existing structure/ roof/wall and into the kitchen space. Additional exhaust systems were provided for the milling and fabrication equipment located in the “maker space”. Exhaust ductwork was routed to dedicated exhaust fans located on the library roof.