Annual Heating Demand
Result Comparison
Normalize a completed model's annual space-heating demand by its matching reference floor area and compare it with a verified project criterion.
Who it's for: energy consultants and architects checking a completed energy model at design development or post-occupancy operations against a verified heating-demand criterion.
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How to use this calculator
The formula
Difference = modeled intensity − verified maximum criterion.
No energy balance, PHPP worksheet, ISO 52016 procedure, or certification determination is performed.
Worked example
When this estimate will be off
- Does not calculate heating demand, heat loss, solar or internal gains, ventilation, infiltration, thermal bridges, schedules, climate effects, or system energy.
- Does not determine the correct reference-floor-area definition or whether total delivered energy was mistaken for space-heating demand.
- Does not select a Passive House, EnerPHit, PHI Low Energy Building, PHIUS, code, or local target.
- A result no greater than an entered criterion is not certification; complete criteria and accredited review remain outside this worksheet.
Frequently asked questions
No. It normalizes and compares a result already produced by a complete declared energy method.
No. The user must verify the applicable PHI criterion and path, and certification evaluates the complete criteria and evidence through the prescribed process.
A common mistake: Does not calculate heating demand, heat loss, solar or internal gains, ventilation, infiltration, thermal bridges, schedules, climate effects, or system energy.
Not unless the selected method and criterion explicitly use that same quantity and boundary. Delivered energy is not automatically the same as modeled space-heating demand.
Sources
- Passive House Institute — Criteria for Buildings, Version 10c — official criteria valid with PHPP Version 10 and project calculation conditions
- ISO 52016-1:2017 — official ISO scope for hourly or monthly calculation procedures for building heating and cooling energy needs
- ISO 52000-1:2017 — official holistic framework for assessing energy performance of buildings
This free Annual Heating Demand Calculator is built and maintained by DataDrivenAEC, using the relevant codes and standards. It does not substitute for professional judgment.