Expert: James Ball - 11/6/2008

Question
i have a blaze king wood insert mod k ff-402 built in 1980 i think i keep talking to people about if i should install it the guy i got it from said just push it in the fireplace and use it but i am getting a lot of opinions on vent or no vent one thing that i cant figure is the opening that vents out is 3" wide and 20 " long where would i find an adapter for that i dont see how it can set down tight on it as it would have to have notches on it to set there also how would you be able to get back in there to clean behind it and hook up the vent  i have been a plumber  for 30 years  now retired and have done a lot of vent work but never have messed with wood stove vents i know some say at least go to the first tile than does it need to be sealed around that if so how. and if i can adapt it to round what size id or od pipe and kind do i need sorry this is so long but you are the expert James and i would appreciate any help or ideas you can give me thanks Robert

Answer
Hello Robert, It is code to install a pipe to the first flue tile (I recommend lining all the way to the top and insulating the SS liner. Makes it easier to clean and less build up) With out the correct installation it is called "Slamming" and the build up and fire hazard would be very dangerous.
the adapter size 3 X 20 = 60 sq inches if that number is correct then you would need an 9" round liner
you should know some one who could make this 3X20 box that will fit (metal fabricators)
if there is no room to install the adapter and liner after the unit is slid into the fireplace then this unit will not fit.
This unit is 28 years old you have no manual, replacement parts tech support, this 3 X 20 adapter and it does not sound as if it will fit and work SAFELY...As "the expert" I would say do not take a chance with this unit and look into a new unit
James Ball