Constant Air Volume - Refers to a type of HVAC system where air volume is constant and airstream is either heated or cooled so as to maintain a constant temperature.
Space below the flooring and above the suspended ceiling that accommodates the mechanical and electrical equipment and is used as part of the air distribution system. The space is kept under negative pressure.
A chemical which acts as a poison by temperature to meet heating and cooling needs.
Occupies most of the posterior cranial fossa; damage produces ataxia, slurring of speech.
Expansive mass of brain tissue covering the older parts of the brain including cerebral hemispheres and formed of sulci, consisting of 4 parts (frontal, parietal, occipital, temporal); 6th division of the C.N.S.; involved in vision, hearing, learning, memory, association, etc.
Made up of the basal ganglia, hippocampus and amygdala; overlaid by cerebral cortex; affects emotion, learning.
Health problems characterized by effects such as dizziness, eye and throat irritation, chest tightness, and nasal congestion that appear whenever individuals are exposed to certain chemicals. People may react to even trace amounts of chemicals to which they have become sensitized.
Characterized by rhythmic waxing and waning of the depth of ventilation, with a regular pattern of apnea, hyperventilation, etc.
Widespread arrhythmic movements of a forcible, rapid, jerky, restless type; movements are irregular and variable, but continuous. They may be simple or quite elaborate, and affect any part of body. Can be caused by damage to caudate nucleus.
A condition involving relatively long periods of time. For CO exposure, chronic is defined as an exposure of 10-15 hrs or more, and may involve one or cycles of exposure.
Those occurring after repeated long-term exposure and are seen months or years after initiation of exposure.
Short, specialized extensions of cells that appear hair-like, often arranged in rows, and present in large numbers. In the human respiratory system, cilia act to propel mucous slowly upwards, removing captured foreign particles.
Air moved through the furnace heat exchanger and then through the house to provide heating or cooling. This may not have any outside air.
Physical and/or chemical removal of scale, corrosion, biofilm, sludge, sediment and extraneous matter.
Component of HVAC system that acts as a heat exchanger, either adding heat or taking heat away from the air stream.
A colony arising from a viable unit of one bacterium or more in a clump. For statistical significance, only those plates with 30 to 300 cfu's are selected for counting.
Additional air brought into the house to allow furnaces, boilers, clothes dryers, ranges and domestic hot water heaters to burn. If the appliance has "sealed" combustion this air will not affect the air within the house.
Start-up of a building that includes testing and adjusting HVAC, electrical, plumbing, and other systems to assure proper functioning and adherence to design criteria. Commissioning also includes the instruction of building representatives in the use of the building.
Air that has been heated, cooled, humidified, or dehumidified to maintain an interior space within the comfort zone (Sometimes referred to as tempered air).
The ability of water to conduct electricity. Conductivity measurement is used for estimating the amount of total dissolved solids in water.
Refers to a type of HVAC system where air volume is constant and airstream is either heated or cooled so as to maintain a constant temperature.
Air handling systems that are designed to provide constant airflow and vary air.
Movement of molecules (gases) from a region of higher air pressure to a region of lower air pressure. Airflow can also be induced by a temperature gradient (e.g., stack effect).
Include sulfur dioxide, particulates, lead, ozone, nitrogen oxides, and carbon monoxide, all designated by the EPA and which have national standards under the National Ambient Air Quality Standards (NAAQS).
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