With negative pressure in the room where the wood-burning stove is located, smoke problems can occur as the smoke seeps out when you open the door – it simply does not get sucked up into the chimney. With extreme negative pressure in the room, smoke may come out even when the door is closed.
If you live in a newer house with a ventilation system, there will be less pressure in the house than if you live in an older house. Negative pressure can also occur if the kitchen extractor fan is running.
You can alleviate the negative pressure by opening a window slightly or turning down the extractor fan. You can also buy a fresh air system for your wood-burning stove – ask your local retailer for more information.
It is recommended that the negative pressure in the house does not exceed 4Pa – this can be checked by the local heating engineer.