No, chimney components from different manufacturers cannot be combined. Code dictates that a chimney system must be comprised of components as certified by one manufacturer. Futhermore, most components are designed in such a way as not to fit correctly if matched with another system's components, rendering it not only uncertified but extremely unsafe.
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An Uponor plumbing system features Engel-method crosslinked polyethylene (PEX) tubing. This is a flexible plastic tubing product that has been used for more than 35 years in radiant floor heating, plumbing and fire safety systems.
Commercial Lennox mutli-furnace installation