Pioneer EStar 9,000 BTU 22.7 SEER2 Ductless Mini-Split Inverter++ Energy-Star Air Conditioner Heat Pump System Full Set 115V - WYS009AMFI22RL-10
- Ultra High Efficiency Inverter++ ductless mini split heat pump system
- Cooling capacity: 9,000 BTU/H with 22.7 SEER2 / 12.5 EER2 efficiency
- Heating capacity: 9,000 BTU/H with 10.0 HSPF2 / 3.86 COP2 efficiency
- Voltage: 110~120 V, 60 Hertz, 1 Ph
- High Wall Mounted Air Conditioning & Heating System
- Variable Speed DC Inverter Operation Mode
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Customizable length copper line set with flare connections
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Energy-Star Certified
- AHRI Estimated Annual Operating Costs:
- Cooling: $74.00
- Heating: $221.00
Included
- Indoor Unit
- Outdoor Unit
- Wireless Remote Control
- Various Installation Kit Options Available
- Flare Connection Leak Guard Sealer
- Installation Manual
- User’s Manual
Manuals
What our Experts Think
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Right‑sized comfort for small to medium rooms (~250–350 sq ft)
This 9,000 BTU 115 V mini‑split delivers balanced cooling and heating for bedrooms, studies, or home offices with efficient performance tailored to moderate‑sized spaces.
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Ultra‑high efficiency (22.7 SEER2 + Energy‑Star)
Standout SEER2 rating and Energy‑Star certification help lower year‑round electricity costs, with AHRI estimates around ~$74 cooling / ~$221 heating annually under typical use.
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Inverter++ DC technology for smooth comfort
The advanced variable‑speed inverter continuously adjusts output for precise temperature control, quieter cycling, and faster comfort recovery compared with fixed‑speed systems.
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All‑season heat pump system
Functions as both cooling and heating with strong HSPF2 performance, eliminating the need for a separate heater or AC unit in many climates.
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115 V standard power (easy setup)
Operates on common household 110–120 V power, avoiding expensive electrical upgrades in many homes.
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Quiet, comfortable airflow
Indoor sound levels can drop to ~23 dB on low fan, keeping operation unobtrusive, while airflow across fan speeds ensures comfort without noise distractions.
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Complete full‑set with accessories
Includes indoor/outdoor units, wireless remote, installation kit options, leak guard sealer, manuals, and warranty—everything needed for a standard installation.
Q&A
Q: What room size is this 9,000 BTU mini split ideal for?
A: Perfect for small rooms (approx. 250–400 sq. ft.), such as bedrooms, home offices, or compact living areas.
Q: Does it provide both cooling and heating?
A: Yes, this inverter++ heat pump delivers efficient year-round cooling and heating.
Q: Is this unit Energy Star certified?
A: Yes, it is Energy Star certified, ensuring high energy efficiency and lower operating costs.
Q: How energy-efficient is the 22.7 SEER2 rating?
A: With 22.7 SEER2, it provides excellent energy savings while maintaining consistent comfort.
Q: What voltage does it require?
A: Designed for standard 115V single-phase power, suitable for most residential circuits.
Q: What is included in the full set?
A: Includes indoor high-wall unit, outdoor condenser, and pre-charged installation kit for easy setup.
Q: Does it support Wi-Fi or smart control?
A: Wi-Fi support may be available with compatible modules for remote operation and scheduling.
Q: How quiet is the indoor unit?
A: Operates quietly, typically 30–40 dB, ideal for bedrooms, offices, or living spaces.
Q: What comfort and usability features are included?
A: Turbo mode, ECO mode, sleep mode, self-cleaning, auto restart, timer, and multi-directional airflow for consistent comfort.
Q: Is professional installation required?
A: Yes, professional installation is recommended; the pre-charged kit covers standard connections, with extra piping needed for longer runs.
Maintenance Tips
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Clean washable air filters every 2–4 weeks – Maintains optimal airflow and 22.7 SEER2 Energy Star efficiency for 250–350 sq ft areas
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Run self-clean function regularly – Prevents mold, bacteria, and odor buildup inside the indoor unit
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Keep indoor & outdoor units free of dust and debris – Ensures consistent airflow and peak heat exchange
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Check and clear condensate drain line – Prevents leaks and water damage
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Maintain 2–3 ft clearance around outdoor unit – Supports efficient cooling/heating performance
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Inspect refrigerant lines annually – Ensures leak-free operation and reliable capacity
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Use ECO, Sleep & Wi-Fi smart modes (if available) – Reduces compressor wear and lowers energy consumption
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Schedule yearly professional servicing – Maximizes inverter efficiency and extends system lifespan
Damage 
Loss 
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