A “4T coil with factory-installed cabinet” refers to an indoor evaporator coil enclosed within a sheet-metal cabinet (cased coil) that comes from the factory, ready to be installed (vertical/upflow, downflow, or horizontal orientation).
Designed to pair with an outdoor condenser or heat pump using R-32 refrigerant.
The coil is typically constructed of aluminum fins and tubing (or all-aluminum construction) to resist corrosion and improve heat transfer. Many manufacturers optimize the circuitry and manifolds for R-32 use.
Goodman
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Goodman Manufacturing
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Goodman
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A factory-installed thermal expansion valve (TXV) is common, to meter refrigerant precisely under varying load conditions.
Goodman Manufacturing
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Budget Heating
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The cabinet typically includes service access panels, insulation (foil-faced or otherwise) to reduce internal condensation, and drain pans with primary and secondary drain connections.
Goodman Manufacturing
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Hacspace
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The cased coil is matched with a blower or air handler (or furnace) to move indoor air over the coil surface.