LABORATORY FUME HOOD ENERGY MODEL

Laboratory fume hoods are energy-intensive. They are intended to provide adequate protection for workers conducting experiments or manufacturing activities within the hoods. The typical fume hood in US climates uses 3.5-times as much energy as a home. This web calculator estimates annual fume hood energy use and costs for user-specified climates and assumptions about operation and equipment efficiencies. To create comparative energy-use scenarios, vary inputs (in blue) in the Assumptions panel as desired.

Location
Hood 1Hood 2 
Energy Prices 1 ]
  Electricity$/kWh
  Electricity Demand$/kW-yr
  Fuel$/million BTU
Operation 2 ]hr/day
Hood Opening (Horizontal)inches
Hood Opening (Vertical)inches
Face Velocityft/min
Fan Power (supply/exhaust) 3 ]W/CFM
Cooling Plant EfficiencykW/ton
Heating System Efficiencypercent
HVAC Supply Air Setpoints
  Heating°F
  Cooling°F
Reheat Energy 4 ]
  Delivery Air Temp.°F
  Energy Type
Hood 1Hood 2Difference 
Flow Rate1,2491,2490CFM
Cooling & Air-handling
   Chiller Energy 5 ]7,9667,9660kWh/year
   Fan Energy19,68819,6880kWh/year
   Total27,65427,6540kWh/year
   Total Power6.76.70.0kW/hood
      of which Fan2.22.20.0kW/hood
      of which Chiller4.54.50.0kW/hood
Heating
   Supply Load 5 ]41410million BTU
   Reheat Load1181180million BTU
   Total Load1591590million BTU
   Energy (fuel)2272270million BTU
   Energy (electric)000kWh
      Average Reheat Power0.00.00.0kW
Total Per-Hood Costs4,2244,2240$/year
   Cost Per CFM3.383.380.00$
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