Calor gas heater is smaller than recommended room

[WaterTight]

What is the reason they give a minimum recommended room size? Are there any dangers involved in putting in a room that's smaller than recommended?

This sort of thing

https://www.calorgas-heaters.co.uk/...-seasons-warmth-portable-calor-gas-heater.jpg

Thanks

[thread title should read Calor Gas Heater IN Smaller Than Recommended Room]

 

[Last Plumber]

What is the reason they give a minimum recommended room size? Are there any dangers involved in putting in a room that's smaller than recommended?

This sort of thing

https://www.calorgas-heaters.co.uk/...-seasons-warmth-portable-calor-gas-heater.jpg

Thanks

[thread title should read Calor Gas Heater IN Smaller Than Recommended Room]

Yes. It is a flueless appliance. It needs the correct ventilation.
Without that, the air will become vitiated and CO will be produced. On top of that the CO2 levels could become too high.
Both are a danger.

 

[WaterTight]

Thanks, very helpful.

My mum just downsized her house and wants to use one in a much smaller living room. Have told her not to use until we check the size against minimum room volumes in manual