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Furnace Condensate Drain: How It Works, Why It Clogs and What Happens When It Does
High-efficiency furnaces make water. Where the condensate drain goes, the trap, the pump and the neutralizer, the signs of a clog, and the shutdowns and le
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Multi-Position Furnaces: Upflow, Downflow and Horizontal in One Cabinet
What a multi-position furnace is, the difference between upflow/horizontal and downflow/horizontal models, how to tell which position your house needs, and
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Can a Furnace Go in the Attic? What Changes, What to Plan For and What to Avoid
Attic furnaces are common in the South and West. Which furnaces can go there, the freeze and drain issues with condensing models, the code basics on access
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Furnace Venting Requirements: Metal Flue, PVC, Direct Vent and What Your House Allows
How 80% and 90%+ furnaces vent, when a chimney can be reused, why condensing furnaces use PVC, direct vent vs single pipe, and the installation rules that
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Oversized vs Undersized Furnace: Why Bigger Is Not Better and What Each Mistake Feels Like
An oversized furnace short-cycles and wears out early; an undersized one runs all day and loses on the coldest nights. The signs of each, why it happens, a
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