MEPro Mobile

Quick MEP field reference — in your pocket.

Everyday

Field Sizing

Code & Comfort

UNIT CONVERTER

RULES OF THUMB — COOLING & HEATING

Building / space type

Conditioned area (ft²)

CHW ΔT °F

HHW ΔT °F

Heat BTU/h·ft²

VELOCITY / CFM / AREA

Solve for

Airflow CFM

Velocity FPM

Round dia. in (optional)

or Area ft²

Enter a round diameter or a duct area. Diameter fills area automatically.

AIR MIXING — MIXED-AIR TEMP & % OA

Outdoor air CFM

OA temp °F

Return air CFM

RA temp °F

FAN LAWS

Design RPM

Design CFM

Design SP in w.g.

Design BHP

New operating point — set by

New RPM

PUMP AFFINITY LAWS

Design RPM

Design GPM

Design Head ft

Design BHP

New RPM

AIR CHANGES PER HOUR

Solve for

Airflow CFM

Floor area ft²

Ceiling ht ft

SOUND LEVELS — ADD & SUBTRACT (dB)

Levels to combine dB, comma-separated

DUCT SIZER — ROUND

Airflow CFM

Run length ft (opt)

Round diameter in

SIZE TABLE

PIPE SIZER

Flow GPM

Run length ft (opt)

Material

Fluid

Fluid temp °F

SIZE TABLE

GAS PIPE SIZER — NFPA 54

Connected load BTU/h

Run length ft

Pressure drop

Material

Heating value BTU/ft³

CAPACITY TABLE (CFH)

VENTILATION — ASHRAE 62.1 (SINGLE ZONE)

Space type

Rp cfm/person

Ra cfm/ft²

Floor area ft²

People Pz

Air distribution effectiveness — Ez

PSYCHROMETRICS

Dry bulb °F

Wet bulb °F

Site elevation ft above sea level