Historic Church Building


HVAC System Retrofit

Luther Memorial Entrance Luther Memorial Altar


Historic Luther Memorial Church Building (Madison, Wisconsin)

he retrofitted HVAC system accommodates twelve different functions in this 40,000-square-foot 1923 Gothic cathedral

  • Concurrent with renovation, including new heating, ventilation, air conditioning
  • The 60 ton chiller operates during off-peak electrical rates (storing 760 ton-hours of ice for peak cooling needs), and is a decoupled system with variable speed pumping throughout
  • Three 94% efficient sealed-combustion boilers utilizing re-circulating pump only during occupied hours
  • Five single zone air handling units (four pipes each) have large face area cooling coils and small fan motors with excess air relief through economizer cycles rather than return fans
  • Direct Digital Control system is easily programmed by staff for ultimate comfort, optimal start, variable flow of fans and pumps without shutoff of individual terminals, functional ice storage and melting, and optimal boiler operation