In fairness to all, we don't discuss pricing on the Wall. Thanks for your cooperation.
Was helping a friend today start her gas boiler. Flipped the switch on and the boiler lit ok. I noticed the exhaust pipe had an opening in it before the chimney. No damper in it. Warm gas seemed to be coming out and I'm thinking this is not good. I attached a few pictures. Am I correct that this is an unsafe condition?