Risk of sick leave associated with outdoor air supply
rate, humidification, and occupant complaints.
ISSUE PARALLEL SERIES Low Temperature Air Poor Control Available Option Dedicated Outdoor Air Supply
Poor Control Available Option First Cost Increased Unchanged Operating Costs Increased Unchanged 90.1 Requirement to Count Motor No Yes Horsepower Increased Air Handler Horsepower Yes No Noise Levels Variable Constant Comfort Levels Variable Constant 62.1 Allows Credit for No Yes Recirculated Air Reducing Outdoor Air Requirements Potential Savings with ECM Motors No Yes
The outdoor air supply
rate was maintained constant at approximately 3.5 times the 7.1 L/sec per person minimum requirement in California (California Energy Commission 2008); the flow rate was monitored continuously with a venturi flow meter (model VWF 555 - 4"; Gerand Engineering Co, Minneapolis, MN).
In the device, the outdoor air supply
is combined with cooling of recirculated room air.
* Adding outdoor air economizers and controls: These systems increase the outdoor air supply
when the additional ventilation will reduce the need for air conditioning.
Should woodstoves and fireplaces have an outdoor air supply
, or should they draw on indoor air?
Airxchange produces energy recovery wheels that improve the efficiency of a building s heating, ventilation and air conditioning units, by preconditioning the outdoor air supply
. The company sells its products to most of the major HVAC manufacturers, including Carrier, Lennox and Trane, Steele said.
Fifty percent energy recovery effectiveness shall mean a change in the enthalpy of the outdoor air supply
equal to 50% of the difference between the outdoor air and return air enthalpies at design conditions.
Effects of temperature and outdoor air supply
rate on the performance of call center operators in the tropics.
However, specific outdoor air supply
amounts were not available for each sampling site, and we used carbon dioxide concentrations as a surrogate for outdoor air supply
(20) In residential buildings in particular, installing high-efficiency particle filtration on the outdoor air supply
of a mechanical ventilation system has advantages over the alternatives of relying on infiltration air through the building enclosure or relying on unfiltered natural ventilation through open windows.
The field studies show an opportunity to save energy by reducing the rate of outdoor air supply
rate because of the high value of contaminant removal effectiveness associated with DV systems in heating season.