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Goodman
1.5 Ton Air Conditioner
Goodman Single-Stage, R-32 | GLXS3BN1810
$1,592.00
At 18,000 BTU, a 1.5 ton air conditioner is the smallest standard split-system size — a fit for apartments, condos, room additions, and single-zone spaces of roughly 600 to 900 square feet. Because the load is small, getting the size exactly right matters more here than on any larger unit.
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In a compact home the temptation is to round up "to be safe" — but an oversized AC is the classic small-space mistake. It cools the air fast, shuts off, and never runs long enough to pull humidity out, so the room feels cold and clammy and the compressor wears from short-cycling. A properly sized 1.5 ton unit runs longer, gentler cycles and holds humidity down.
If you're cooling a single open area or an addition rather than a whole ducted home, it's worth comparing a 1.5 ton split system against a ductless mini-split before you commit:
Tell us about the space and we'll confirm whether 1.5 tons is the right size →
For most apartments, condos, and small additions up to roughly 900 sq ft, yes. The exact fit depends on insulation, sun exposure, and ceiling height — a quick load calculation confirms it, but 1.5 tons is the go-to size for compact spaces.
18,000 BTU per hour. One ton equals 12,000 BTU/h, so 1.5 tons is 1.5 × 12,000 = 18,000 BTU/h.
For a single room, garage, or addition with no existing ductwork, a ductless mini-split is often the simpler, more efficient choice. If the space is already on a duct system, a 1.5 ton ducted split makes more sense.
Only if it's oversized for the load. Sized correctly, a 1.5 ton runs steady cycles. The risk with small spaces is going bigger than needed, which causes short-cycling and poor humidity control.
Yes. Pair the outdoor condenser with an 18,000 BTU evaporator coil or air handler so the system hits its rated efficiency and stays under warranty.