Lab / Systems

Air · gas · energy · safety

Room loads, duct friction, fuel-gas capacity, PV strings, battery packs, teaching ampacity, LOTO, and embedded pinouts. Every number prints what it is not.

Not Manual J, not Manual D, not IFGC, not NEC 690, not a LOTO program. Identities and teaching tables only.

Room load (sensible sketch)

Wall UA W/K

Window UA W/K

ΔT K

People

Lights W

Volume m³

ACH

Envelope 560 W · people 210 W · lights 120 W · infil 502.5 W · total 1392.5 W (0.3959340347 ton)

UA = U × A you measured. No solar, no latent, not Manual J.

Duct Darcy friction

Length m

Diameter m

Velocity m/s

11.52 Pa · 0.04624648735 in. w.c.

f = 0.02 teaching. No fittings. Not Manual D.