Terms
This process uses an adjustable frame to cover the door of the home and measures house leakage.
Blower Door Testing
This is a tool that is often used to measure the difference in pressure between two spaces, and is the original "U-tube"
Manometer
The best type of pressure to have at the base of a chimney, or base of a fireplace, to establish good draft and flow.
Negative Pressure
You feel cold air entering the living room CAZ through the fireplace. You would need to measure the pressure difference between the living room CAZ and where else?
The outdoors.
True or false. Corbels, offsets, and burn habits have no affect on draft and flow.
False
This term is used when referring to the pressure difference between the inside and outside of the chimney vent.
Draft
The two ports at the top of a digital manometer.
Input and Reference
The term used to refer to the energy generated when molecules vibrate.
Temperature
True or false. Taller homes and taller chimney experience greater wind loading.
For products of combustion to adequately flow up a flue, this MUST be present in the flue.
Draft
This term is used in reference to byproducts of combustion entering the home instead of rising through the chimney or vent.
Spillage
A term of measurement used to measure air pressure, and is somewhat equivalent to Water Column.
Pascals
The term used to describe how energy is transferred directly from one molecule to the next.
Conduction
The area between the upper and lower pressure zones.
Neutral Pressure Plane, NPP
Air leaking from the building shell through an open window is an example of a ____________ component in air flow.
Passive
This is the process by which heated air rises and moves away from the heat source, cools as it moves, falls as it cools and gets pulled back to the heat source.
Convective Loop
The measurement used to refer to the volume of air flowing through a system.
The term used to describe heat traveling in a straight line and converting into energy when it strikes a solid object.
Radiation
The customer has complained smoke is spilling into the basement through a basement fireplace. Would you measure the pressure difference WRT the outside, or WRT another interior zone?
WRT another interior zone. In this case, the main floor above, or potentially another room in the basement.
True or false. Sealing and weatherproofing the home raises the Neutral Pressure Plane.
False
This term is used to describe the natural rising of warm air within a building or structure creating a lower pressure in the lower parts of the building or structure.
Stack Effect
This test measures how hard HVAC blowers work, and helps to identify leaks in duct work.
The term used to describe the transfer of heat in a liquid or gas.
Convection
The process used by a technician where the home is set up in winter condition and is used to determine the differential between certain conditions and the base pressure measurement.
Worst Case CAZ Testing
Typically the minimal amount of pressure difference from the CAZ WRT outdoors to cause a fireplace to have poor draft and flow.
10 delta Pa