KEYSTONE
★ 4.9 (181 reviews)

Keystone - 450 Sq. Ft. 10,000 BTU 230V Through-the-Wall Air Conditioner with 10,600 BTU Supplemental Heat Function - White

GTIN 840148726079
Original price was: $482.99.Current price is: $359.99.
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Ships free anywhere in the U.S. Ships from Aiea. Standard delivery in 4–7 business days.
With reliable air conditioning units, Keystone produces consistent cooling to keep you comfortable, even on the hottest days. Installed easily through-the-wall, this 10,000 BTU / 10,600 BTU supplemental heating capacity air conditioning unit can effectively cool rooms up to 450 square feet with dehumidification up to 2.3 pints per hour to remove moisture from the air. Perfect for smaller-sized living spaces like apartments, dorm rooms, sheds, and much more. The unit features a unique remote with a thermostat built in to sense the temperature of the room, displays it on the remote's LCD screen, and sends a signal to your AC unit every 3 minutes for accurate cooling. Money saving features include energy saver mode, sleep mode, and a programmable 24-hour timer. You'll know when it's time to easily remove and clean the mesh filter with the Check Filter alert. Keystone not only provides a 1-year warranty but ensures that you stay cool and comfortable at a cost-conscious price.
Orders processed within 24-48 hours. Standard U.S. delivery takes 4-7 business days with tracking provided via email.
Enjoy 30 days hassle-free returns. Items must be in original condition with box and accessories.
We test every product personally, offer 100% authentic items, 12-month standard warranty, and 24/7 dedicated customer service.

Customer Reviews

181 verified reviews from real customers

4.9 /5
★★★★★
181 verified reviews
5★
82%
4★
12%
3★
4%
2★
1%
1★
1%
A
Ashley T.
May 17, 2026
✓ Verified Buyer
★★★★★

Fast Shipping & Smooth Experience

Ordered this and received it in just 3 days! Tracking was updated regularly. Very satisfied with the delivery speed.

L
Laura M.
Jul 1, 2026
✓ Verified Buyer
★★★★★

Great Communication & Support

I reached out with a query regarding my order and got a polite response within minutes. Fantastic customer service!

D
David K.
Aug 14, 2026
✓ Verified Buyer
★★★★★

Top Notch Packaging

The product arrived safely with double protective packaging. Exceeded my expectations in build quality.

M
Marcus B.
Sep 02, 2026
✓ Verified Buyer
★★★★★

100% Authentic Product

Works perfectly right out of the box. Original seal intact and exactly as described on the website.

S
Sarah P.
Sep 20, 2026
✓ Verified Buyer
★★★★★

Hassle-free Purchase

Checkout was super clean and fast. Got email confirmation instantly. Will definitely buy again from ET Electronics!

J
James R.
Oct 05, 2026
✓ Verified Buyer
★★★★★

Highly Recommended Store

Reliable seller! Fast shipping, pristine packaging, and very helpful updates along the way.