An Air Barrier is a tested component or material that is installed to control the unintended movement of air into and out of a building enclosure. In order to qualify, the tested component should have an air permeance of less than 0.02 L/(s•m2) @ 75 Pa (0.004 cfm/ft2 @ 1.57 lb/ft2) or equivelant to a 1/2 […]
Substantial Completion is a term used for when a project or a specific phase of a project is essentially completed allowing for it’s use or the next phase to begin. This term is generally used & tied into payment schedules. For example, in a bathroom renovation one could be completely finished with the exception of […]
A KWh is short for Kilo Watt Hour, which is equivalent to 1000 watts being used for an hour, or a 100-watt bulb being left on for 10 hours.
AV can stand for either Audio Visual Equipment or Adjusted Volume. The Adjusted Volume is a means of determining the energy efficiency of a regular refrigerator / freezer combo. As a freezer is colder than a refrigerator and yet they use the same condenser, etc… they have to account for the additional power required. they do […]
Exfiltration describes air flowing outward through the building envelope which is the opposite of infiltration. In the summer months this area will tend to be towards the lower portion of the building due to “summer stack effect”, while during the cooler months this tends to be located up higher due to normal stack effect. For MORE
A Certificate of Occupancy is issued by the local municipality after all inspections have been passed & fees paid and is required before anyone can occupy and live within the home.
CO or Carbon Monoxide is a colorless, odorless, highly poisonous gas produced by the incomplete burning of a fuel. For More CO can also stand for Certificate of Occupancy which is required before the building can be used for it’s intended purpose.
HSPF or Heating Seasonal Performance Factor, is an efficiency rating for Heat Pumps which takes the estimated seasonal heating output in BTU’s & divides that by the amount of energy that it consumes. The higher the HSPF the better. Currently units must have a 7.7 HSPF or better with 13 being the most efficient.
Heat in it’s truest form is energy & when used in the building science field refers only to the transfer of this energy between or through items. It is not a measure of its temperature or the stored energy of the item. For More
A coil is generally used to quickly remove or add heat into the surrounding medium. The two most common ones are part of the HVAC system which has an Evaporator Coil & a Compressor Coil. Coils may also be found in Certain hot water systems, like boilers, solar thermal, etc…