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Duct Free Systems

Duct free heating and cooling systems make your home's individual rooms or other small spaces more comfortable. Remember, just like whole-home systems, the higher the SEER/SEER2 and HSPF/HSPF2 ratings, the more efficient they will be.

The DOE’s regional breakdown by state is as follows:

  • North
    • 14.0 SEER/ 13.4 SEER2
    • 8.8 HSPF/7.5 HSPF2
  • Southeast
    • 15.0 SEER/ 14.3 SEER2
    • 12.2 EER/11.7 EER2
    • 8.8 HSPF/7.5 HSPF2
  • Southwest
    • 15.0 SEER/ 14.3 SEER2
    • 12.2 EER/11.7 EER2
    • 8.8 HSPF/7.5 HSPF2
DOE Regional SEER Breakdown Map

SEER/SEER2 And HSPF/HSPF2

SEER2 is an updated rating standard introduced by the DOE. SEER2 standards are intended to provide a better gauge of typical home operating conditions whereas the older SEER rating utilized very precise protocols to determine ratings in ideal conditions. SEER2 standards include updated testing means that give a better indication of how a unit will operate in the real world.

HSPF2 is the newest type of rating system that expands on the basic HSPF scale.

Much like miles-per-gallon for a car, SEER/SEER2, EER/EER2 and HSPF/HSPF2 offer an easy way to compare efficiencies of different products – the higher the rating, the more efficient the unit. Just be sure you are comparing either SEER vs SEER or SEER2 vs SEER2 (same for EER/EER2 and HSPF/HSPF2).

EER2 vs. SEER2

EER2 and SEER2 both evaluate an air conditioner’s energy efficiency, but they’re concerned with two different types of temperature conditions:

  • EER2 measures an air conditioner’s efficiency at the peak cooling temperature of 95°F.
  • SEER2 measures an air conditioner’s efficiency throughout an entire cooling season, with temperatures ranging from 65°F to 104°F.

Call SERVICE 1 PLUMBING, HEATING & A/C, INC. To Find Out If Duct-Free Systems Are Right For You.

We offer a variety of through-the-wall packaged terminal air conditioners (PTAC) and duct free heating and cooling systems to meet any individual room's needs. Call us now at (815) 254-1449.

LG Indoor Ductless Heat Pump Units

Art Cool Premier Wall Mount

Art Cool Premier Wall Mount Indoor Unit

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Model Family: Art Cool Premier Wall Mount
Purpose: Heat and Cool
Zone Capability: Single zone
Efficiency SEER2: Dependent on outdoor Unit
Efficiency EER2: Dependent on outdoor Unit
Efficiency HSPF2: Dependent on outdoor Unit
Matching Outdoor Unit: Single-Zone: KNSAL**1A
Matching Outdoor Unit: Multi-Zone:
Energy Star Certified: ENERGY STAR®
Refrigerant Type: R-32
Number of Fan Speeds: Up to 6 Fan Speeds
Sound Level: Quiet operation
Wireless Remote: Yes
Factory Warranty Parts: 5 Year Parts Warranty
Manufacturer's Stated Benefits:
  • 24-Hour on/off timer
  • 4-Way auto swing
  • Auto changeover
  • Auto restart
  • Built-in low ambient operation to 14
  • Chaos wind
  • Condensate sensor connection
  • Defrost control
  • Dehumidifying mode
  • Hot start
  • Jet cool/Jet heat
  • Self cleaning indoor coil
  • Self diagnosis
  • Sleep mode
  • Soft dry operation
  • Soft dry operation
  • Cooling only switch
  • 3M Micro Protection Filter
  • Smart AC module
High Efficiency Wall Mount

High Efficiency Wall Mounted

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Model Family: High Efficiency Wall Mount
Purpose: Heat and Cool
Zone Capability: Single Zone and Multizone
Efficiency SEER2: Dependent on outdoor unit
Efficiency EER2: Dependent on outdoor unit
Efficiency HSPF2: Dependent on outdoor unit
Matching Outdoor Unit: Single-Zone: KSUAB0**1A
Matching Outdoor Unit: Multi-Zone: Dependent on the number of inside units
Energy Star Certified: ENERGY STAR®
Refrigerant Type: R-32
Number of Fan Speeds: 6 fan speeds
Sound Level: Quiet operation
Wireless Remote: Yes
Factory Warranty Parts: 5-year parts limited warranty
Manufacturer's Stated Benefits:
  • Systems are available in 9,000, 12,000, 18,000, and 24,000 Btu/h capacities.
  • Ultra Quiet Operation - Indoor unit sound pressure 19 dB (Sleep Mode)
Art Cool Mirror High Wall Unit

Art Cool High Wall Mirror Series

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Model Family: Art Cool Mirror High Wall Unit
Purpose: Heat and Cool
Zone Capability: Single Zone and Multizone
Efficiency SEER2: Up to 23.8 SEER2
Efficiency EER2: Up to 14.95 EER2
Efficiency HSPF2: Up to 10.9 HSPF2
Matching Outdoor Unit: Single-Zone: KUSAB**1A
Matching Outdoor Unit: Multi-Zone: Dependent on the number of inside units
Energy Star Certified: Energy Star Rated
Refrigerant Type: R-32
Number of Fan Speeds: Up to 6 Fan Speeds
Sound Level: Quiet operation
Wireless Remote: Yes
Factory Warranty Parts: 5 Year Parts Warranty
Manufacturer's Stated Benefits:
  • 4-Way auto swing
  • 24-Hour on/off timer
  • Auto restart
  • Auto changeover
  • Chaos wind
  • Condensate Sensor Connection
  • Inverter (variable speed compressor)
  • IDU compatible with Multi F ODU
  • Jet cool/Jet heat
  • 3M Micro Protection Filter
  • Self-cleaning indoor coil
  • Sleep mode
  • Cooling only function
Standard Efficiency Wall Mounted

Standard Efficiency Wall Mounted

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Model Family: Standard Efficiency Wall Mounted
Purpose: Heat & Cool
Zone Capability: Single Zone
Efficiency SEER2: Up to 18 SEER2
Efficiency EER2: Up to 12EER2
Efficiency HSPF2: Up to 8.7 HSPF2
Matching Outdoor Unit: Single-Zone: KUSAE**1A
Matching Outdoor Unit: Multi-Zone:
Energy Star Certified: No
Refrigerant Type: R-32
Number of Fan Speeds: 6 Fan Speeds
Sound Level: Quiet Operation
Wireless Remote: Yes
Factory Warranty Parts: 5-Year Parts Warranty
Manufacturer's Stated Benefits:
  • Built-in Wi-Fi – Control your system remotely with the ThinQ® app for convenience and flexibility.
  • Jet Mode – Delivers powerful airflow and high-speed compressor operation for maximum cooling performance without time limits.
  • Auto Fan Speed – Adjusts airflow automatically based on cooling demand for consistent comfort.
  • Smart Care – Uses sensors to predict temperature changes as room usage shifts, adapting operation for enhanced comfort.

LG Outdoor Duct Free Units

Art Cool™ Premier Single Zone Outdoor Inverter

Art Cool™ Premier Single Zone Outdoor Inverter

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Model Family: Art Cool™ Premier Single Zone Outdoor Inverter
Purpose: Heat & Cool
Zone Capability: Single Zone
Efficiency SEER2: Up to 24 SEER2
Efficiency EER2: Up to 14.4 EER2
Efficiency HSPF2: Up to 11 HSPF2
Energy Star Certified: ENERGY STAR®
Refrigerant Type: R-32
Sound Level: Quiet operation
Compressor: Variable Speed Compressor
Factory Warranty Parts: 5 Year Parts Warranty
Factory Warranty Compressor: 7 Year Compressor Warranty
Manufacturer's Stated Benefits:
  • 24-Hour on/off timer
  • Auto changeover
  • Auto restart
  • Condensate sensor connection
  • Defrost control
  • Dehumidifying mode
  • Hot start
  • Self cleaning indoor coil
  • Soft dry operation
High Efficiency Outdoor Heat Pump

High Efficiency Outdoor Heat Pump

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Model Family: High Efficiency Outdoor Heat Pump
Purpose: Heat and Cool
Zone Capability: Single zone
Efficiency SEER2: 22.5 SEER2
Efficiency EER2: 12.80 EER2
Efficiency HSPF2: 10.5 HSPF2
Energy Star Certified: ENERGY STAR®
Refrigerant Type: R-32
Sound Level: Quiet operation
Compressor: variable speed compressor
Factory Warranty Parts: 5 Year Limited Warranty
Factory Warranty Compressor: 7-Year Limited Warranty on the compressor
Manufacturer's Stated Benefits:
  • Factory-Installed Refrigerant Leak Detection – Monitors for leaks to enhance safety and system protection.
  • Active Energy Control (AEC) – Helps homeowners optimize energy use based on their usage patterns.
  • Jet Mode – Delivers powerful airflow and high-speed compressor operation for maximum cooling performance.
  • Low Refrigerant Detection – Helps prevent potential system damage by detecting low refrigerant levels early.
  • Auto Clean+ – Helps maintain performance by periodically drying the heat exchanger to reduce moisture buildup
Multi F MAX LGRED

Multi F Max Heat Pump

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Model Family: Multi F MAX LGRED
Purpose: Heat and Cool
Zone Capability: Multi Zone
Efficiency SEER2: Up to 20.5 SEER2
Efficiency EER2: Up to 12.5 EER2
Efficiency HSPF2: Up to 9.5 HSPF2
Energy Star Certified: Select models are ENERGY STAR® labeled
Refrigerant Type: R-32
Sound Level: Quiet operation
Compressor: Variable-speed compressor
Factory Warranty Parts: 5 Year Parts Warranty
Factory Warranty Compressor: 7 Year Compressor Warranty
Manufacturer's Stated Benefits:
  • Defrost / De-icing capabilities
  • Restart delay of three minutes
  • Self diagnosis capabilities
  • Soft start reduces power surges to electrical systems
  • Available LGRED° Heat Technology: Ensures reliable heating performance in extreme winter weather.
Standard Efficiency Single Zone Outdoor Unit

Standard Efficiency Single Zone Outdoor Unit

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Model Family: Standard Efficiency Single Zone Outdoor Unit
Purpose: Heat and Cool
Zone Capability: Single Zone
Efficiency SEER2: 18 SEER2
Efficiency EER2: 12 EER2
Efficiency HSPF2: 8.5 HSPF2
Energy Star Certified: Energy Star Rated
Refrigerant Type: R-32
Sound Level: Quiet operation
Compressor: Variable speed compressor
Factory Warranty Parts: 5 Year Parts Warranty
Factory Warranty Compressor: 7 Year Compressor Warranty
Manufacturer's Stated Benefits:
  • Built-in Wi-Fi – Control your system remotely with the ThinQ® app for convenience and flexibility. Active
  • Active Energy Control (AEC) – Helps homeowners optimize energy use based on their usage patterns.
  • Jet Mode – Delivers powerful airflow and high-speed compressor operation for maximum cooling performance without time limits.
  • Auto Clean+ – Helps maintain system performance by periodically drying the heat exchanger to reduce moisture buildup.

LG Alternate Indoor Ductless Units

4-Way Ceiling Cassette

4-Way Ceiling Cassette

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Model Family: 4-Way Ceiling Cassette
Purpose: Heat and Cool
Zone Capability: Single Zone and Multizone
Efficiency SEER2: Dependent on outside unit
Efficiency EER2: Dependent on outside unit
Efficiency HSPF2: Dependent on outside unit
Matching Outdoor Unit: Single-Zone: KUSXB**1A
Matching Outdoor Unit: Multi-Zone: Dependent on the number of inside units
Energy Star Certified: All models are ENERGY STAR® and ENERGY STAR Cold Climate certified
Refrigerant Type: R-32
Number of Fan Speeds: Up to 5 Fan Speeds
Sound Level: Quiet operation
Wireless Remote: Yes
Factory Warranty Parts: 5 Year Parts Warranty
Manufacturer's Stated Benefits:
  • Inverter variable-speed compressor on the outdoor unit for energy-saving operation
  • Many modes included, controlled through wireless remote or wired wall controller: Cooling, Heating, Dehumidifying, Fan
  • Powerful heating performance provides maximum heating capacity up to 100% of rated capacity at 5 °F for LGRED° models.
  • Factory-installed refrigerant leak detection sensor for release mitigation.
  • Wide operation range with heating down to -13 °F (LGRED° models) and cooling up to 118 °F ensures comfort throughout the year
Low Static Ducted Indoor Unit

Low Static Ducted Indoor Unit

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Model Family: Low Static Ducted Indoor Unit
Purpose: Heat and Cool
Zone Capability: Single Zone and Multizone
Efficiency SEER2: Dependent on outdoor Unit
Efficiency EER2: Dependent on outdoor Unit
Efficiency HSPF2: Dependent on outdoor Unit
Matching Outdoor Unit: Single-Zone:
Matching Outdoor Unit: Multi-Zone: Dependent on number of inside units
Energy Star Certified: No
Refrigerant Type: R-32
Number of Fan Speeds: 3 Fan Speeds
Sound Level: Quiet operation
Wireless Remote: Yes
Factory Warranty Parts: 5- Year Limited Parts Warranty
Manufacturer's Stated Benefits:
  • ESP control
  • Hot Start
  • Auto restart
  • Two-thermistor control
  • Sleep mode
Low Wall Console Indoor Unit

Low Wall Console Indoor Unit

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Model Family: Low Wall Console Indoor Unit
Purpose: Heat and Cool
Zone Capability: Single Zone and Multizone
Efficiency SEER2: Dependent on outdoor unit
Efficiency EER2: Dependent on outdoor unit
Efficiency HSPF2: Dependent on outdoor unit
Matching Outdoor Unit: Single-Zone: KUSXB**1A
Matching Outdoor Unit: Multi-Zone: Dependent on the number of inside units
Energy Star Certified: No
Refrigerant Type: R-32
Number of Fan Speeds: (Max / H / M / L)
Sound Level: Sound levels as low as 27 dB(A)
Wireless Remote: Yes
Factory Warranty Parts: 5-year parts limited warranty
Manufacturer's Stated Benefits:
  • Factory-installed refrigerant leak detection sensor for release mitigation
  • Flexible Installation: Mount low on the wall or the floor to suit your space needs
  • Jet Cool / Jet Heat: Provides rapid heating and cooling for optimal comfort.
  • Compatibility with Control Accessories: Wired Controllers, Dry Contacts, Wi-Fi Module, and Auxiliary Heat Relay Kit