GREE GJC08BU-A6DRNJ2A
window air conditioner · 8,300 BTU cooling · fits ~415 sq ft
A window AC rated 8,300 BTU — enough cooling for a room of roughly 415 square feet (the 20-BTU-per-square-foot rule).
Buy this unit
Sold on Amazon — 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 could not confirm a listing for this exact model number, so this opens an Amazon search for a GREE window AC of this capacity — one we checked returns real results. Compare whatever you find against the certified specs above.
Sized for ~415 sq ft — measure your room and check your window type before you buy.
See matching units on Amazon →Affiliate link. We may earn a commission — it never changes your price or our specs. Opens a search, not a specific listing — we have not verified any individual result is this exact model.
At a glance
Who it's for
Cooling a single room of about 415 sq ft — a bedroom, office or apartment — that you install yourself, no contractor.
The standout number
CEER 16 — 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 2024-11-25
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 · ~389 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 91%
of the 420 room ACs with a published CEER
Cooling capacity
8,300 BTU
Sized for a room of about 415 sq ft at 20 BTU per square foot.
Brand, warranty & reliability
Gree is the world's largest residential AC maker and OEM behind many US-facing brands, with good reliability when properly sized and professionally installed, but coverage is tiered and not all contractors are familiar with Gree systems.
Reliability is our read of published brand assessments (source), not a certified rating — real-world dependability hinges on a correct install more than the brand. Warranty terms are the manufacturer's (policy) and almost always require online registration within 60–90 days for the full length.
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 GREE GJC08BU-A6DRNJ2A cool?
It puts out 8,300 BTU of cooling. The common rule of thumb is 20 BTU per square foot, so it suits a room of about 415 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 GREE GJC08BU-A6DRNJ2A?
It is rated CEER 16. 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 47% less energy than the federal minimum for its size.
What does the GREE GJC08BU-A6DRNJ2A cost to run?
We estimate about $73 a year to run it — roughly 389 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 GREE GJC08BU-A6DRNJ2A fit my window?
Measure your window opening first — it needs to be at least 21" wide (the cabinet width), and the unit is about 13" tall and 18" deep, roughly 61 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 GREE GJC08BU-A6DRNJ2A?
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.