Keystone - 8,000 - 14,000 BTU Through the Wall Heat/Cool Air Conditioner - KSTAT08-1HC

• Through-the-wall installation (Not suitable for window installation)
• Standard, universal interior trim kit for existing wall sleeve included (New wall sleeve sold separately: KSTSLV1)
• Special 230-volt/20-amp electrical outlet required (Unit will not work with a standard 115V outlet)
• 14,000 BTU cooling capacity / 10,600 BTU supplemental heating capacity
• 12,000 BTU cooling capacity / 10,600 BTU supplemental heating capacity
• 10,000 BTU cooling capacity / 10,600 BTU supplemental heating capacity
• 8,000 BTU cooling capacity / 4,200 BTU supplemental heating capacity
• Supplemental heat capability provides an additional heat source to your main heat source when outdoor temperatures are above 45°F
• Designed for a room up to 450 sq. ft.
• Dehumidification up to 2.3 pints per hour
• Electronic controls with LED display allows you to easily select options with the touch of a button
• Temperature sensing LCD remote control allows you control the temperature from across the room
• Auto-restart saves your settings for when power is restored to the unit
• Adjustable 4-way air flow direction allows you to easily control the direction of the cool air
• 3 cooling speeds, 3 fan speeds, and 1 heat speed
• Auto function determines the fan speed depending on the set temperature
• Programmable 24-hour on/off timer cools on your schedule
• Energy-saver mode conserves energy and saves you money
• Sleep mode gradually increases room temperature after being activated
• Easy-clean mesh filter with Check Filter alert on the unit
• 6.5 ft. power cord with NEMA 6-15P grounding plug makes extension cords unnecessary

Downloads

• Specification Sheet
• Product Manual
• Warranty Guide
• Energy Guide
• Miscellaneous
• CA Prop 65 Warning Label
• CA Prop 65 Retail POP

What our Experts Think

• All‑Season Comfort: Combined heating and cooling in one unit adds versatility for year‑round use.

• Flexible Capacity Range: 8,000–14,000 BTU suits small to medium rooms — efficient performance across varied spaces.

• Through‑the‑Wall Design: Permanent installation reduces noise and vibration while freeing up window space.

• Customizable Comfort: Multiple modes and fan speeds let users dial in precise temperature and airflow.

• Energy‑Smart Operation: Balanced cooling/heating helps manage energy use and operating costs.

• Low Maintenance: Washable filter and accessible panels make upkeep quick and simple.

• Reliable Build: Durable design delivers consistent performance and long‑term value.

Q&A

Q: What cooling and heating capacities does this unit offer?
A: The range covers 8,000 to 14,000 BTU cooling and up to 10,600 BTU supplemental heating — versatile year‑round climate control.

Q: What size room is this designed for?
A: Suitable for medium to large rooms, typically 350–700 sq ft depending on BTU capacity.

Q: What installation type is required?
A: Designed for through‑the‑wall installation (not for standard window mounting). A wall sleeve is sold separately.

Q: Does it include a remote and controls?
A: Yes — features electronic controls with LED display and a temperature‑sensing LCD remote for convenient adjustments.

Q: What comfort and energy‑saving features are included?
A: Includes energy‑saver mode, sleep mode, programmable 24‑hour timer, and auto‑restart, plus adjustable 4‑way airflow to customize comfort.

Q: Does it help with humidity control?
A: Yes — built‑in dehumidification removes excess moisture to improve overall comfort.

Q: Is it quiet?
A: Engineered for quiet operation, making it suitable for living spaces and bedrooms.

Maintenance Tips

• Clean or rinse the washable air filter every 2–4 weeks to maintain airflow and efficiency

• Wipe the front grille and vents regularly to prevent dust buildup

• Inspect and clear the condensate drain and ensure wall sleeve seals are tight to avoid moisture issues

• Use heat/cool mode appropriately and set thermostat wisely to reduce runtime and wear

• Keep surrounding area clear for proper ventilation and airflow

• Schedule an annual professional service to clean coils and check refrigerant and electrical components