Chamber & Recirculation
Chamber volume—ft³
Interior surface area—ft²
Recirc / squirrel-cage CFM (@ target ACM)—CFM
Range: 6 ACM / 10 ACM— / —
Burner Sizing (BTU/hr)
Panel transmission loss—
Product/mass load—
Exhaust/ventilation loss—
Steady-state total—
Recommended burner size (w/ margin)—
NFPA 86 — Direct-Fired Safety Ventilation
Pre-ignition purge volume (4× chamber)—ft³
Purge time @ recirc fan CFM—
Combustion ventilation (products of combustion)—SCFM
Formula used: combustion ventilation = (burner BTU/hr ÷ 1,000,000) × 183 SCFM. This is separate from recirc CFM and sized off the burner output above — true it up once your supplier confirms the actual burner unit.
Zone Velocity Profile (advisory)
Front runs low to protect uncured powder from blow-off. Back runs high to finish cure. Adjust % per zone on your VSD/damper controls — this is a starting profile, not a fixed rule.