The Frigidaire 12,000 BTU Through-the-Wall Air Conditioner and the Keystone 12,000 BTU Through-The Wall 230V Air Conditioner - Cool/Heat side by side on one honest scale: cooling, room coverage, noise, energy rating and live price, with which one actually fits your room. Every number is the manufacturer's own or a live retailer price. We never invent a spec.
The verdict
For your 250 sq ft room, neither is an ideal fit: the Frigidaire 12,000 BTU Through-the-Wall Air Conditioner is more cooling than the room needs and the Keystone 12,000 BTU Through-The Wall 230V Air Conditioner - Cool/Heat is more cooling than the room needs. On the numbers, the Frigidaire 12,000 BTU Through-the-Wall Air Conditioner is cheaper at $629. Compare their specs side by side below, or try a different room size.
![]() Frigidaire 12,000 BTU Through-the-Wall Air ConditionerWindow In stock $629 Buy at Sylvane | ![]() Keystone 12,000 BTU Through-The Wall 230V Air Conditioner - Cool/HeatWindow In stock $649.99 Buy at Sylvane | |
|---|---|---|
| Cooling & fit | ||
| Room fit | More than you need for 23.2 m² | More than you need for 23.2 m² |
| Cooling power | 12,000 BTU · 3.5 kW | 12,000 BTU · 3.5 kW |
| Covers | up to 550 sq ft | up to 550 sq ft |
| Comfort | ||
| Indoor noise | ||
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Both units are scored on the exact same scale, from the manufacturer's own published specs and the live retailer price where we have one. Room fit uses the official ENERGY STAR sizing chart, or an estimate from cooling power when a maker publishes no coverage. Where the two efficiency scales are not comparable, we never crown a winner. Nobody can pay for placement.
Read our full methodologyNot sure which kind of AC you need? See the buying guides or the system types.
The bigger questions behind this comparison, answered from live prices and real specs.
| 58 dB(A)about as loud as a dishwasher |
| - |
| Indoor unit size | Average | Average |
|---|
| Practicalities | ||
| Heats too | Yes | Yes |
|---|---|---|
| Install | Plug and play | Plug and play |
| Outdoor unit | No | No |
| Price | ||
| Price | $629Best | $649.99 |
|---|---|---|