Core TradesQuestion 101 of 700
A high-efficiency (condensing) furnace produces acidic condensate. This condensate must be:
a.Drained to an approved location, often with neutralization, and not allowed to damage materials
b.Vented up the flue with the exhaust gases
c.Left to evaporate inside the cabinet
d.Piped into the return air duct
Explanation
Condensing furnaces generate acidic condensate that must be routed to an approved drain, often neutralized, to avoid corroding materials and clogging. It cannot go up the flue, evaporate in the cabinet, or enter the return air where it would spread moisture and corrosion.
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