Has anyone had success installing a woodburning stove in a 1960's
bungalow fireplace. I did it last year and although not burning
wonderful it was far better than the open fire. Now it tends to spoke
more with the odd puff coming out through the air vents.
As the fireplace only had a 4 inch wide gap by 14 inches long and the
flue from the stoove was six inches I made a stainless adapter so that
the 6 inch flu goes into two four inch flues.
Any ideas please to improve it.

Thanks

Smokeyone

PS No blockage in the chimney.