Keystone 8,000 BTU 115V Window Air Conditioner with 3,500 BTU Supplemental Heat Capability, 8000 BTUs

Keystone 8,000 BTU 115V Window Air Conditioner with 3,500 BTU Supplemental Heat Capability KSTHW08B

ByKeystone

$429.99

{BOLD_AS_LOW_AS}{BOLD_AFFIRM_REUSE_TITLE_SECTION_1}or 0% APR with Affirm

Earn $21.50 in rewards, with 5% back¹, plus more exclusive perks

BTU Cooling:

12000

BTU Cooling (BTUs):

8000 BTUs

FREE 2-Day Delivery

Get it by Fri, Jun 26

43215

(Order within 2 hrs 24 mins)

Get $40 off your qualifying first order of $100+** with the Wayfair Credit Card! Valid through 7/7/2026.**

Apply Now

Services

5 Year Protection Plan -

$75.99 ($15.20/year)

Get Everything You Need

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At a Glance

Thermostat Included

Progammable Timer

Requires Window Access

Pieces Included: Remote Control

About This Product

At Keystone, we prioritize your family's comfort. Our heat/cool window air conditioner is designed with versatile supplemental heat when outdoor temperatures exceed 23 degrees Fahrenheit. Please note that this mode is meant to complement your primary heat source and should not be relied upon as the sole heat source. It is important to have a special 230-volt/25-amp electrical outlet for optimal operation (for some models ONLY), as this unit does not function with standard 115V household outlets. Our window air conditioner is equipped with money-saving features such as an energy saver mode, sleep mode, and a programmable 24-hour timer. With the convenience of our Follow Me LCD remote control, everyone can easily adjust settings and enjoy the blissful comfort provided by our unit. Choose Keystone for the ultimate in comfort and efficiency for your family.

What's Included?

Thermostat
Air Filter Included
Remote Included
Window Adapter
Installation Kit

Not Included:

Condenser
Air Handler

Features

Window air conditioner available in a range of BTU options to fit your needs
This air conditioner offers 3 cooling speeds to customize the amount of cooling you need for comfort
Enjoy flexible comfort with this unit's temperature settings, including cooling modes like Eco mode for energy savings and Sleep mode for gradual temperature adjustments during sleep
Supplemental heat capability provides an additional heat source to your main heat source when outdoor temperatures are above 23°F
Equipped with a washable air filter that can be rinsed every few weeks to maintain peak performance and air quality
Window ac unit with dehumidifier is backed by a 1 year limited warranty for peace of mind

Keystone 8,000 BTU 115V Window Air Conditioner with 3,500 BTU Supplemental Heat Capability KSTHW08B

ByKeystone

$429.99

{BOLD_AS_LOW_AS}{BOLD_AFFIRM_REUSE_TITLE_SECTION_1}or 0% APR with Affirm

Earn $21.50 in rewards, with 5% back¹, plus more exclusive perks

BTU Cooling:

12000

BTU Cooling (BTUs):

8000 BTUs

FREE 2-Day Delivery

Get it by Fri, Jun 26

43215

(Order within 2 hrs 24 mins)

Get $40 off your qualifying first order of $100+** with the Wayfair Credit Card! Valid through 7/7/2026.**

Apply Now

Services

5 Year Protection Plan -

$75.99 ($15.20/year)

Get Everything You Need

Home Intuition 33ft Weather Stripping Seal – Self-Adhesive High-Density Foam Tape, 3/16" x 3/8", Soundproof Insulation

Four-Day Flash Sale

The Windmill Air Purifier Max 3-in-1, Medical Grade, HEPA Filter, Quiet, AHAM Verifide 450 Sq Ft, Smart - White

AM Series ANYAIR AMWS Air Conditioner Weather Strip

Lasko Desktop Air Purifier with 3-Stage Air Cleaning System, Portable House Fan

At a Glance

Thermostat Included

Progammable Timer

Requires Window Access

Pieces Included: Remote Control

About This Product

What's Included?

Thermostat
Air Filter Included
Remote Included
Window Adapter
Installation Kit

Not Included:

Condenser
Air Handler

Features

Window air conditioner available in a range of BTU options to fit your needs
This air conditioner offers 3 cooling speeds to customize the amount of cooling you need for comfort
Enjoy flexible comfort with this unit's temperature settings, including cooling modes like Eco mode for energy savings and Sleep mode for gradual temperature adjustments during sleep
Supplemental heat capability provides an additional heat source to your main heat source when outdoor temperatures are above 23°F
Equipped with a washable air filter that can be rinsed every few weeks to maintain peak performance and air quality
Window ac unit with dehumidifier is backed by a 1 year limited warranty for peace of mind

Keystone 8,000 BTU 115V Window Air Conditioner with 3,500 BTU Supplemental Heat Capability KSTHW08B

Services

Get Everything You Need

Home Intuition 33ft Weather Stripping Seal – Self-Adhesive High-Density Foam Tape, 3/16" x 3/8", Soundproof Insulation

The Windmill Air Purifier Max 3-in-1, Medical Grade, HEPA Filter, Quiet, AHAM Verifide 450 Sq Ft, Smart - White

AM Series ANYAIR AMWS Air Conditioner Weather Strip

Lasko Desktop Air Purifier with 3-Stage Air Cleaning System, Portable House Fan

At a Glance

30-Day Return Policy

Keystone 8,000 BTU 115V Window Air Conditioner with 3,500 BTU Supplemental Heat Capability KSTHW08B

Services

Get Everything You Need

Home Intuition 33ft Weather Stripping Seal – Self-Adhesive High-Density Foam Tape, 3/16" x 3/8", Soundproof Insulation

The Windmill Air Purifier Max 3-in-1, Medical Grade, HEPA Filter, Quiet, AHAM Verifide 450 Sq Ft, Smart - White

AM Series ANYAIR AMWS Air Conditioner Weather Strip

Lasko Desktop Air Purifier with 3-Stage Air Cleaning System, Portable House Fan

At a Glance

30-Day Return Policy

Customer Reviews

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Keystone 8,000 BTU 115V Window Air Conditioner with 3,500 BTU Supplemental Heat Capability KSTHW08B

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Get Everything You Need

Home Intuition 33ft Weather Stripping Seal – Self-Adhesive High-Density Foam Tape, 3/16" x 3/8", Soundproof Insulation

The Windmill Air Purifier Max 3-in-1, Medical Grade, HEPA Filter, Quiet, AHAM Verifide 450 Sq Ft, Smart - White

AM Series ANYAIR AMWS Air Conditioner Weather Strip

Lasko Desktop Air Purifier with 3-Stage Air Cleaning System, Portable House Fan

At a Glance

Description

Specifications

Return Policy

Keystone 8,000 BTU 115V Window Air Conditioner with 3,500 BTU Supplemental Heat Capability KSTHW08B

Services

Get Everything You Need

Home Intuition 33ft Weather Stripping Seal – Self-Adhesive High-Density Foam Tape, 3/16" x 3/8", Soundproof Insulation

The Windmill Air Purifier Max 3-in-1, Medical Grade, HEPA Filter, Quiet, AHAM Verifide 450 Sq Ft, Smart - White

AM Series ANYAIR AMWS Air Conditioner Weather Strip

Lasko Desktop Air Purifier with 3-Stage Air Cleaning System, Portable House Fan

At a Glance

Description

Specifications

Return Policy

Customer Reviews

Compare Similar Items

5,000 BTU Window Air Conditioner Cools Up to 150 Sq.Ft.,Window AC Units with Cool,Fan,Washable Filter,Quiet Operation,Easy to Use for Bedroom,Small Rooms,White

LG 8000 BTU DOE 115V Through-the-Wall Air Conditioner with Remote Control LT0816CER

Durastar 8,000 BTU 115V Through the Wall Air Conditioner with 4200 BTU Supplemental Heating and Remote Control

5,000 Btu Window-Mounted Room Air Conditioner