Heating, Gas & Air Calculators
Gas usage, diesel heater fuel, heater sizing and ventilation.
Free heating, gas & air calculators for van heating, gas & ventilation
Quick, accurate tools to help you plan, size and budget the heating, gas & air side of your van conversion. Pick a calculator below to get started.
Gas bottle
Days a propane/butane bottle lasts from your usage.
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Diesel heater
Litres per night and tank life on a diesel heater.
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Heater sizing
kW heat output needed for your van's volume and ΔT.
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Ventilation
Fan CFM/m³h needed for your van volume and air changes.
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Why van heating, gas & ventilation planning matters
Avoid costly mistakes
Sizing your heating, gas & air correctly up front saves money, weight and time. Use these calculators before you buy components or commit to a layout.
Built for van life
Every formula is tuned for real campervan and motorhome use cases, with sensible defaults so you can get a useful answer in seconds.