Additions and Renovations to Harrisonburg Mennonite Church (2017); this project involved a 5,300 square foot addition and renovation work in various parts of the 35,000 square foot existing building. The architect for the project was Blue Ridge Architects and Harman Construction performed the general construction work. Blauch Brothers provided design and installation (known as design/build) of the plumbing and HVAC systems as well as controls. Trumbo Electric designed and upgraded (also design/build) the electrical system including a new underground primary service and new main electrical room.
Blauch Brothers plumbing work consisted of domestic and sanitary piping and fixtures for the addition, which included a pair of three-stall restrooms for men and women. A new high efficiency condensing gas water heater was installed to serve the addition and kitchen hot water needs. This water heater replaced the electric water heater that was limited in capacity for the kitchen. Several roof drains were installed on the existing flat roof that was walled off by the new construction. In the existing building, a main water shutoff valve was replaced and a water cooler was replaced with a sink with a large gooseneck just right for filling coffee percolators.
Blauch Brothers mechanical work consisted of HVAC (heating, ventilating and air conditioning) controls, HVAC ductwork, equipment, and mechanical piping. Blauch Brothers in house controls department installed a new Honeywell web-based control interface to replace an aging BAS (building automation system). This control system operates the 2 boilers, 4 rooftop units and 11 split system HVAC units throughout the facility with drag and drop scheduling, the ability for remote troubleshooting and trending graphs, and advanced energy saving strategies. Three new rooftop units for the addition were selected based on efficiency and serviceability. For example, the office area is served by a 17 SEER Trane rooftop with VAV terminal units to provide control for 10 different zones. Rooftop units were provided with hail guards, improved filtration, and hinged doors. The sanctuary and entry lobby received a facelift with all new architectural floor grills and ductwork modifications. The renovated classrooms received two new split system heat pumps and all new ductwork. Mechanical piping included a new upgraded natural gas meter at 2-psi service with a new main line concealed in the building for 100 feet and then passing onto the roof to serve two existing boilers, 3 new rooftop units, and the water heater. Provisions were also made for future gas capacity including a proposed addition and a possible kitchen renovation. Several hot water coils and radiant floor heat were piped from the existing hot water system.
In all, 11 of the 15 HVAC systems in the church were modified in some way! Future information will show whether this added square footage results in more energy usage or if the changes and selections noted above result in enough savings to keep overall usage the same. Comfort for the occupants in the new offices should be much better that before with individual control. Improved core components such as gas piping and controls system provide value by being selected for the long-term needs of the church.