These TWO calculations are required for the home’s “CONDITIONED SPACE”
What are AREA and VOLUME
100
Air changes per Hour (House volume/hour).
What is ACH?
100
The roles of and minimum requirements for mechanical and natural ventilation systems and the building envelope intended to provide acceptable indoor air quality.
What is ASHRAE Standard 62.2?
100
A2 + B2 = C2
What is the PYTHAGOREAN Theorem?
100
Uses a fan assembly to INTRODUCE air into the home at a controlled rate, but relies on building leakage or planned outlet dampers to remove moisture and contaminants
What is a Supply Only, Ventilation system?
200
What is the distance around the outer limits of any two dimensional object.
What is the PERIMETER?
200
It is a measure of force per unit area.
What is a PASCAL?
200
The INTENTIONAL ventilation that allows the homeowner some CONTROL in the amount and timing of air exchange in the home.
What is Mechanical Ventilation?
200
This is used to find the area of ANY Triangle.
A = ½ bh OR A = (b x h) / 2
200
This is the length of a straight line from a circle's center point to the edge of the circle.
What is the RADIUS?
300
This calculation can be useful for determining
rafter length when calculating sloped ceiling areas.
What is the PATHAGOREAN Theorem?
300
A guideline for determining when mechanical ventilation is required.
What is the Building Airflow Standard?
300
Depends on climate, number of occupants, building height, and and shielding from the wind by external objects (trees, other buildings, etc) through a factor called the n-value (CFMn).
What is Minimum Ventilation Requirement (MVR)?
300
2 (Length + Width) OR, written another way:
2 x Length +2 x Width
What is the the PERIMETERof a rectangle or square?
300
A fan operated system that includes inlets and outlets allowing air exchange to occur while minimizing unplanned air flow through building cavities AND
Draws outdoor air into the house and expels an equal amount of indoor air to the outdoors.
What is a Balanced System Ventilation system?
400
The unit of measure used for determining VOLUME.
What is Cubic Feet (FT3)?
400
Natural airflow in cubic feet per minute.
What is CFMn?
400
Uses a fan assembly to REMOVE air, moisture, and contaminants from the home, but relies on building leakage or planned inlet dampers to provide incoming air.
What is Exhaust Only - Whole House, ventilation?
400
Length x Width
What is AREA of a rectangle or square?
400
These are primarily used in air-conditioned homes in hot, humid climates.
What is ERV – Energy Recovery Ventilator?
500
This is a value reflecting the annual amount of energy needed to heat a building.
What is HDD (Heating Degree Day)?
500
Air flow, in cubic feet per minute, with a 50 pascal pressure difference (this is the Blower Door measurement).
What is CFM50?
500
Uses a fan assembly to REMOVE air, moisture, and contaminants from the home, but relies on building leakage or planned inlet dampers to provide incoming air.
What is Exhaust Only - POINT SOURCE, Ventilation?
500
π=Pi
C =πD OR C = 2 πR
How do you find out the Perimeter of a Circle?
500
Both types of these include a heat exchanger, one or more fans to push air through the machine, and some controls.
What is a Heat-recovery ventilators (HRV) and Energy-recovery (or enthalpy-recovery) ventilators (ERV)?