Patent ID: 7811085

Claim:
A gas preheater comprising: an exit plate having first and second sides and a plurality of through holes; at least one body mounted adjacent said first side, said at least one body having a first end and a second end, said second end located between said body first end and said exit plate first side, at least one sidewall connecting said first and second ends, a body opening in said first end extending into said body and defining a body inner wall, and a plurality of passages extending between said at least one sidewall and said body inner wall; an entrance plate connected to said exit plate and supporting said body adjacent to said exit plate; at least one preheater sidewall connecting said entrance plate and said exit plate and defining with the entrance plate and the exit plate a preheater interior, said entrance plate including at least one hole aligned with the body opening of the at least one body; and an insert supported in said body opening by said entrance plate, said insert comprising an insert body having a first end and a second end and an insert opening extending from said first end to said second end.