A by-product of natural gas combustion that is not harmful.
A colorless, odorless, highly poisonous gas produced when carbon burns without sufficient air nearby.
A device that draws air in axially and discharges it radially.
A class of refrigerants. Generally refers to the Chlorofluorocarbon family of refrigerants. Sometimes called Freon.
Computational Fluid Dynamics is a computer-based mathematical model of fluids in a space. In the HVAC industry CFD is used to simulate the direction, velocity, and temperature of air in a building.
CFM (Cubic Feet per Minute)
A standard measurement of airflow that indicates how many cubic feet of air pass by a stationary point in one minute. The higher the number, the more air is being forced through the system.
Amount of refrigerant placed in a refrigerating unit.
Chilled beams are a form of radiant cooling commonly used in europe. Chilled beams can be "passive" (no external source of air is provided) or "active" (some amount of air is provided from an external source...usually the ventilation air required for a space). Chilled beams are linear in nature normally measuring about 12" across and extending the length of a room. Chilled beams are installed in the ceiling.
A device that opens an electric circuit when an overload occurs.
A reaction called rapid oxidation or burning produced with the right combination of a fuel, oxygen, and heat.
The range of temperatures, humidities and air velocities at which the greatest percentage of people feel comfortable.
Pump of a refrigerating mechanism which draws a low pressure on cooling side of refrigerant cycle and squeezes or compresses the gas into the high pressure or condensing side of the cycle.
The moisture collected on an evaporator coil.
A small pump used to pump condensate to a higher level.
Part of the outdoor portion of a split-system air conditioner or heat pump. By converting refrigerant that is in a gas form back to a liquid, the coil transfers heat carried by the refrigerant to the outside air.
The temperature at which a vapor changes to a liquid.
Part of a refrigerating mechanism which pumps vaporized refrigerant from the evaporator, compresses it, liquefies it in the condenser and returns it to the refrigerant control.
The transfer of heat through a solid material.
The movement of heat by fluid flow(e.g. air, water).