Owner's manual

106 — ITI SHEET METAL/HVAC PRO
FanLaw1Formula
FanLaw2Formula
FanLaw3Formula
After a Full Reset/Clear All, your calculator will return to the following
settings:
SETTING IMPERIAL
On-Center Spacing 16 Inches
Fractional Resolution 1/16
Area Display Standard
Volume Display Standard
Desired Riser Height 7-1/2 Inches
Desired Tread Width 10 inches
Stairway Headroom 6 Feet 8 Inches
Floor Thickness (Stairs) 10 Inches
Jack Rafters Descending
Irregular Jack Spacing OC-OC
Exponent On
Meter Linear Rounding 0.000
Degree Rounding Float
Mathematical Operations Order of Operations Method
APPENDIXF—DEFAULTSETTINGS
where,
BHP = Brake Horsepower
CFM = Feet
3
per Minute
S
S
where,
SP = Static Pressure
CFM = Feet
3
per Minute
where,
CFM = Feet
3
per Minute
RPM = Revolutions per Minute
APPENDIX E — FAN LAW FORMULAS