Data reference · Tier B · screening reference · Generated 2026-09-02 · verify against the governing standard, equipment nameplate or manufacturer manual.

Outdoor design conditions

Browse Manual J winter and summer design temperatures by US city.

HVAC Calculator ProReference dataUpdated 2026-09-02

Browse the reference set

PurposeOpen a specific reference page for the full table, source notes and use boundaries.
Last verified2026-09-02