High-efficiency Category II, III, and IV condensing boilers produce corrosive condensate that eats ordinary stainless steel. Metalcraft fabricates UL 1738-listed Special Gas Vent in AL29-4C and 316L — the only materials proven to handle the chemistry of modern condensing technology over decades of service.
Our in-house engineering team provides complete design assistance, structural calculations, and drafting support for projects of any scale.
