Ventilation Calculator

Calculate airflow using room volume and air changes per hour (ACH). The working formula is simple: airflow = volume × ACH.

Uses the real formula: airflow = volume × air changes per hour (ACH).

Length (m)

Width (m)

Ceiling height (m)

Room type

Typical ACH: 3–4

Air changes per hour (ACH)Reserve (%)

Simple instruction

Next step after ventilation

Once airflow is clear, the next useful move is usually lighting or the broader engineering budget.

Lighting Calculator

Check the lighting load for the same room while its size and function are already defined.

Budget Planner

Combine ventilation, lighting and related engineering costs in one estimate.

Volume

Volume = length × width × height. Measure the room wall to wall.

ACH

Typical values: living rooms 3–4 ACH, kitchens 6–10, bathrooms 6–8.

Reserve

Add 10–15% to account for duct losses and general tolerance.

Bathroom Hub

Keep bathroom ventilation, tile, lighting, and layout guidance in one place.

Underfloor Heating

Estimate power, cable length and energy usage for heated floors.

Budget Planner

Add engineering work and equipment costs to your renovation plan.