You know, I just spent the entire day with state air regulators, senior EPA staff, a group hell bent on making it difficult to sell wood stoves. I think that was less difficult than this thread. So the question is; do air leaks damage cats. In short yes. Clearly more dramatically in cordereite substrates but also metal.
Anytime a substrate is heated, it expands, as it cools, it contracts.
The binding agent (washcoat) can develop fractures from rapid expansion and contraction as well as rapid temperature changes (thermal shock).
Try to keep air leaks and rapid temperature changes to a minimum.
Superstar, I'd be happy to accept your combustors and will test them for efficacy. If you send them to me, I'll get them checked out.
Incidentally, I will only be in my office 2 or 3 days each month between now and end of July. So please...don't expect rapid turn around.
Off the Las Vegas for International Builders Show, then MEM, KOP, NOL, MSP, FAI,MCO, ANC, MSP again, BOI and one great bourbon town Louisville. I'll post March and April later....
Be nice to one another...