Visit the soo's newest pub - the boiler room - now open! Warranty coverage applies only to the original problem if a new problem appears it would not be covered. Did you know that improper sizing of your boiler can make your unit run less efficiently and wear out prematurely? This means that as a owner/occupier you will now be responsible for. We offer solutions for all of your commercial plumbing needs! Parts lists and diagrams for the viessmann product line. Plumbers install, repair.