![How much heat will I be losing to this vent that seems fairly open to the outdoors and how can I prevent that? : r/DIYUK How much heat will I be losing to this vent that seems fairly open to the outdoors and how can I prevent that? : r/DIYUK](https://i.redd.it/avzbun4q44381.jpg)
How much heat will I be losing to this vent that seems fairly open to the outdoors and how can I prevent that? : r/DIYUK
John Sayers on X: "Before & after #Plastering #Painting coving @Tikkurila_UK @BenjaminMooreUK paints used covering #London #Essex https://t.co/7oJA5xh5YH" / X
![How much heat will I be losing to this vent that seems fairly open to the outdoors and how can I prevent that? : r/DIYUK How much heat will I be losing to this vent that seems fairly open to the outdoors and how can I prevent that? : r/DIYUK](https://i.redd.it/1imjop4q44381.jpg)