Air Changes

Calculates room air changes per hour from supplied ventilation airflow and room volume. The template provides a deterministic closed-form ventilation rate check using ACH = supply airflow / room volume.

inputs

2 fields

context

2 archetypes

engine

with-tool

outputs

1 scored fields

contract fields

Parameter Map

2 inputs to 1 scored outputs

supply_airflow_m3_h
float
Supply ventilation airflow rate
10 to 200000m3/h
room_volume_m3
float
Room air volume
5 to 100000m3

air_changes_per_htol 0.03

Air changes per hour

visibility contract

Difficulty Ladder

all_giveneasy

All parameters given for a small ventilated room

all fields visible

all_givenmedium

All parameters given across small and large ventilated spaces

all fields visible

all_givenhard

All parameters given for larger process ventilation checks

all fields visible

scenario bands

Archetype Atlas

small_plant_room

2 contexts

Small mechanical or electrical plant room ventilation check

supply_airflow_m3_h200 to 2500

room_volume_m330 to 500

mechanical-plant-room / electrical-switchroom

large_process_space

2 contexts

Large process or utility space with dilution ventilation

supply_airflow_m3_h3000 to 80000

room_volume_m31000 to 30000

water-treatment-process-hall / industrial-utility-building

rendered task

Generation Preview

water-treatment-process-hall-large-process-space-preview

difficulty: hard
visibility: all_given
archetype: large_process_space
site context: water-treatment-process-hall

instruction excerptair-changes_calc.py

visible fields

supply_airflow_m3_h3000 to 80000 m3/h
room_volume_m31000 to 30000 m3

withheld schema

air_changes_per_h

Large process or utility space with dilution ventilation. water-treatment-process-hall. Required outputs: air_changes_per_h