K�hl+ KHVS12B33B
window air conditioner · 12,600 BTU cooling · fits ~630 sq ft
A window AC rated 12,600 BTU — enough cooling for a room of roughly 630 square feet (the 20-BTU-per-square-foot rule).
Buy this unit
Sold online — DIY install
A window AC is a self-install unit: you set it in the window (or wall sleeve), no contractor or refrigerant charge needed. We link a live Amazon search for this exact brand and model so you see current prices and sellers.
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At a glance
Who it's for
Cooling a single room of about 630 sq ft — a bedroom, office or apartment — that you install yourself, no contractor.
The standout number
CEER 15.8 — the room-AC efficiency number; higher means a lower summer electric bill.
The catch
Window units only fit windows in their size range — measure your window width and height against the dimensions below before you buy.
The Verified Label — every certified spec
certified 2026-06-17
status: Active
Cooling & efficiency — source: ENERGY STAR / DOE
Fit & install — does it fit your window?
Operating cost — computed by Verified HVAC Data
Estimated annual running cost
per year at U.S. average electricity prices · ~598 kWh
Efficiency tier
ENERGY STAR Most Efficient — top tier
Running cost falls as CEER rises and as you run it fewer hours. Your climate and local electricity price change the total.
Refrigerant & identity
How it ranks
Where this unit sits among the 420 window and through-the-wall air conditioners we track, on CEER — the efficiency number that decides its running cost. Percentiles are computed from our corpus (higher = better).
CEER efficiency
Better than 85%
of the 420 room ACs with a published CEER
Cooling capacity
12,600 BTU
Sized for a room of about 630 sq ft at 20 BTU per square foot.
Rebates & incentives
This unit meets ENERGY STAR Most Efficient, the top room-AC tier some utility rebates require. The federal 25C credit expired December 31, 2025, and it never covered room ACs anyway; the live money is state and utility programs. Check what applies where you live on our rebates page.
Compare similar room ACs
Frequently asked questions
What size room does the K�hl+ KHVS12B33B cool?
It puts out 12,600 BTU of cooling. The common rule of thumb is 20 BTU per square foot, so it suits a room of about 630 square feet with 8-foot ceilings. Sunny rooms, kitchens or spaces with many people need a bit more; heavily shaded rooms a bit less.
How efficient is the K�hl+ KHVS12B33B?
It is rated CEER 15.8. CEER (Combined Energy Efficiency Ratio) is the DOE test number for room air conditioners — the higher it is, the less electricity the unit uses for the same cooling. This model uses about 61% less energy than the federal minimum for its size.
What does the K�hl+ KHVS12B33B cost to run?
We estimate about $113 a year to run it — roughly 598 kWh, at U.S. average electricity prices and a typical cooling season. Your climate and local power price move the number; running it fewer hours costs less.
Will the K�hl+ KHVS12B33B fit my window?
Measure your window opening first. This unit's cabinet is about 26" wide and 16" tall, 29" deep, and weighs roughly 115 lb. Most double-hung windows fit units in this range with the included side panels, but confirm your window's inside width and minimum height.
Where can I buy the K�hl+ KHVS12B33B?
Room air conditioners are self-install and sold online. Our "Find it on Amazon" button opens a live search for this exact brand and model so you can compare current prices and sellers. It sets in the window (or wall sleeve) yourself — no contractor and no refrigerant charge.
Sources. Certification and CEER from ENERGY STAR room-AC data and the DOE compliance certification database. Cooling capacity, dimensions and refrigerant are the manufacturer-certified values. Annual running cost, suggested room size and the percentile are computed by Verified HVAC Data from published ratings and EIA U.S. average electricity prices — see our methodology. Refrigerant GWP is the IPCC value. We publish no star ratings and take no payment for placement. "Not published" means the source registry doesn't disclose it — we never fill a spec with a guess.