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
The Frigidaire 12,000 BTU Through-the-Wall Air Conditioner and the Keystone 12,000 BTU Through-The Wall 230V Air Conditioner - Cool/Heat are close alternatives: the Frigidaire 12,000 BTU Through-the-Wall Air Conditioner is cheaper at $629. Set your room size to see which one fits it better.
![]() 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 | ||
| 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 | 58 dB(A)about as loud as a dishwasher | - |
| Indoor unit size | Average | Average |
| Practicalities | ||
| Heats too | ||
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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.
| Yes |
| Yes |
| Install | Plug and play | Plug and play |
|---|
| Outdoor unit | No | No |
|---|
| Price | ||
| Price | $629Best | $649.99 |
|---|---|---|