Diversity Factor Cooling Load Calculator

Inputs

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Compute the factor from a known coincident block, or apply a factor to a connected sum.
Each zone's individual peak cooling load added together (non-coincident).
Btu/h
The building's simultaneous peak — from a coincident load calculation or trend data.
Btu/h

Results

Default result
Edit inputs
Diversity factor(DF)
0.798
Pass

Zone equipment is still sized to each zone peak — diversity applies to the central plant and mains only.

Block ÷ sum of peaks; ≤ 1 by definition.

Also computed

Block load(Q_blk)95.88Btu/h

Capacity reduction(ΔQ)24.23Btu/h

Reduction20.2%

Method notes 4 notes
  • Diversity exists because zones peak at different hours (east glass in the morning, west in the afternoon, interior at occupancy). Plant and mains are sized to the coincident block; terminal units to their own zone peaks.
  • The DF VALUE must come from a coincident load calculation (hour-by-hour), trend data or documented experience for the building type — this page does the arithmetic, not the judgment.
  • Do not stack diversity with safety factors invisibly: state both explicitly or sizing reviews become archaeology.
  • Heating diversity behaves differently (morning warm-up can be nearly coincident) — be careful borrowing cooling DFs.

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