Why is my lounge cold and draughty?
Why do I not feel warm when my heating is on?
Why is my back cold when I sit in front of the fire?
reason is that
The chimney is sucking heat out and pulling draughts in.
You will suffer constant draught & heat loss
Seal your chimney when not in use with a Fireplace Heatsaver
chimney draught excluder
Your house will be warmer,
your heating bills will be lower