
At Keystone, your family’s comfort starts here. Keystone
offers a full assortment of budget-friendly Home Comfort
Solutions for every room in the house. Whatever air
conditioner type you need – window, window/wall,
thru-the-wall, or portable – Keystone has you covered. We
even have AC models with heating options! Keystone’s
assortment of flexible Window/Wall Air Conditioners is
designed with a removable chassis so you can install
them either in a window or through an exterior wall. Our
two-in-one installation marvel includes an adjustable
window kit for convenient window installation. For wall
installation, you can use an existing compatible wall
sleeve or purchase one of ours separately. Coveted
features include a programmable timer, sleep mode,
and energy saver mode.
Window Air Conditioners
MODEL
PERFORMANCE
BTU Capacity (Cool/Heat)
Heat/Cool Unit
Dehumidication (pints/hour)
Cooling Area
EER
ELECTRICAL
Volts
Amps (Cool/Heat)
Watts (Cool/Heat)
Power Cord Length (Feet)
Plug Type (NEMA)
FEATURES
Control Type
Number of Fan Speeds
Energy Saving Mode
Sleep Mode
Check Filter Indicator
Programmable Timer
Energy Star Rated
Remote Control
Air CFM (Fan Speeds)
Air Direction Control
Filter Type
Warranty
KSTHW08A KSTHW12A
8,000/3,500 BTU 12,000/11,000 BTU
Yes Yes
1.9 2.5
350-sq. ft. 550-sq. ft.
10.9 10.9
115V 230V
6.4/11.7 5.0/15.2
734/1220 1100/3450
7 7
NEMA 5-15P NEMA 5-15P
Electronic Electronic
3 3
Yes Yes
Yes Yes
Yes Yes
Yes Yes
No No
Yes Yes
202/231/248 223/255/279
4-way 4-way
Washable Washable
1 year parts and labor 1 year parts and labor
SPECIFICATIONS
Refrigerant
Product Dims (WxHxD) inches
Product Weight (lbs.)
Shipping Dims (WxHxD) inches
Shipping Weight (lbs.)
R410A R410A
22.6x16.1x23 22.6x16.1x23
75.4 84
28.4x16.9x25 28.4x16.9x25
87.5 95