Why is my wood stove not as efficient as it used to be?

When stoves lose efficiency, there are a number of possible causes.

1. The wood you are burning contains too much moisture, is not as solid
or the same type as you formerly used. Compare seasoned wood
performance before you blame the stove.

2. The gasket around the stove door may not be making the tight
seal it used to. When it leaks air into the firebox, more heat is
drawn up the chimney and doesn't get transferred into the house
where you need it.

3. If the stove uses a catalyst, the catalyst may be exhausted, and
need to be replaced.