Apr 7, 2026 — Clifton

AHU Equipment Room Sizer

You're laying out a mechanical floor and the architect asks 'how big does the AHU room need to be?' The answer depends on the tonnage, which depends on the space type and area served, which nobody has calculated yet. This sizer does the chain: pick a space type and square footage, and it sizes the AHU, adds service clearances, and draws the room at scale. Use it to block out mechanical space before the MEP engineer is on board.

Purpose: reveals how fast equipment rooms grow with CFM — and how early you need to know the served area to hold your core.
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Total CFM
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Room (W × L)
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Room Area (sf)

Next improvement: The likeliest next improvement is adding duct penetration zones — showing where supply and return duct connections exit the room and the shaft space they require.

Future: Boiler Room Sizer — boiler footprint, flue clearances, combustion air intake, and code-required room volume for gas-fired equipment, from NFPA 54 and IMC Chapter 3.

Future: Electrical Room Sizer — switchgear, transformer, and panel clearances (NEC 110.26 working space) for a given service size, with ventilation requirements.