The units can be individually serviced through access doors for easy maintenance. These units economically vary the quantity of air to each space to meet the load saving operating fan power costs. Fully conditioned fresh outside air is introduced at a constant level to the facility in sufficient quantity for a healthy environment and to pressurize the cracks around windows and doors against the infiltration of drafts and leaks. Return air ductwork was eliminated and the machine room itself is kept immaculate for a low maintenance cost with occasional vacuuming and wet mopping. The boiling of the water destroys bacteria and distills out impurities for a dust-free, hygienic atmosphere.
Computerized controls cycle the boilers to consume just enough fuel to precisely meet the load.
These extremely compact units can each fire up to one million BTUs and wring out so much heat from the products of combustion that the gases condense to a liquid requiring only a six inch wall vent rather than an expensive, large chimney to the roof. An exterior 200-ton capacity York International Corporation chiller cools the facility. The outside location saves expensive emergency refrigerant gas purging ventilation required for code safety, eliminates the need for vibration and noise containment and saves valuable floor space. Two sets of compact in-line chilled and hot water pumps are mounted overhead above the space needed for the coil removal area using the same square footage of the floor for both the coil and pump servicing. The pipe and fittings on the pumps are conveniently laid out horizontally for ease of preventive maintenance and service.