Ductless Systems
The flexible answer for zoned climate control
Single-zone and multi-zone ductless systems deliver warm or cool air right where you need it. Whether you want to improve temperature control in specific rooms or to replace inefficient window units and space heaters, a ductless system offers a solution that’s not only flexible—it’s quiet, efficient, economical, and easy to install.

23 SEER2 Single-Zone Ductless System
Energy Star
- Available for installations in all regions (23 SEER2)
- 9000, 12000, 18000, and 24000 BTUH models available
- Outdoor sound range of 50-52 dB
- Handheld remote controller included
- Heating capability down to -22°F (-30°C)
- Inverter driven (variable speed compressor)
- Includes base pan heaters
- Blue Fin Coastal coating
- Meets Energy Star® requirements
- AHRI Certified Systems
Ductless Systems
23 SEER HP Single Zone Ductless Systems
Outdoor | Indoor | SEER | HSPF | EER | Cooling Capacity (BTUH) | Heating Capacity (BTUH) | Voltage | Gas Line | Liquid Line | Max Overcurrent Protection | Low ambient heating capability |
M4THS2309A11NA | M4MHW2309A1N0A | 23 | 11 | 14.3 | 9100 | 11000 | 208‑230/60/1 | 3/8" | 1/4" | 15 | -22°-86° F (-30°-30° C) |
M4THS2312A11NA | M4MHW2312A1N0A | 23 | 11 | 13 | 12000 | 12000 | 208‑230/60/1 | 1/2" | 1/4" | 15 | -22°-86° F (-30°-30° C) |
M4THS2318A11NA | M4MHW2318A1N0A | 23 | 11 | 13 | 18200 | 18200 | 208‑230/60/1 | 5/8" | 1/4" | 20 | -22°-86° F (-30°-30° C) |
M4THS2324A11NA | M4MHW2324A1N0A | 23 | 11 | 13 | 22000 | 24000 | 208‑230/60/1 | 5/8" | 1/4" | 25 | -22°-86° F (-30°-30° C) |
SEER, or Seasonal Energy Efficiency Ratio, measures how efficiently a unit can cool your home in the summer. The higher the SEER number, the less energy you'll use.
RunTru Limited Warranty: 5-year limited warranty for functional parts 10-year warranty for functional parts with registration 20-year warranty for heat exchanger
Find out more about the RunTru Limited Warranty here.

19 SEER2 Multi-Zone Ductless System
- Mix and match up to 5 indoor units to achieve 42K BTUH heating and cooling
- Low ambient heating down to -22° F
- Energy Star® certified—eligible for rebates
- Outdoor unit sound levels as low as 56 dB
- Port adapters included
- 9000, 12000, 18000, & 24000 BTUH high wall mounted indoor models available
- Handheld remote controller included with each indoor unit
- Blue Fin Coastal coating
Ductless Systems
Ductless Systems

17 SEER2 Single-Zone Ductless System
- Excellent entry level single zone ductless system for contractors and quick turn projects
- 9000, 12000, 18000, & 24000 BTUH models available
- Outdoor sound range of 50-58 dB
- Matches with current indoor highwall models
- Blue Fin Coastal coating
- Port adapters included
- Heating capability down to -4ºF (-20ºC)
- Handheld remote controller included
Ductless Systems
17 SEER HP Single Zone Ductless Systems
Outdoor | Indoor | SEER | HSPF | EER | Cooling Capacity (BTUH) | Heating Capacity (BTUH) | Voltage | Gas Line | Liquid Line | Max Overcurrent Protection |
M4THS1709A11NA | M4MHW1709A1N0A | 17 | 9 | 10.25 | 9100 | 9500 | 208‑230/60/1 | 3/8" | 1/4" | 15 |
M4THS1712A11NA | M4MHW1712A1N0A | 17 | 9 | 9.25 | 12000 | 13000 | 208‑230/60/1 | 3/8" | 1/4" | 15 |
M4THS1718A11NA | M4MHW1718A1N0A | 17 | 9 | 8.53 | 17400 | 18000 | 208‑230/60/1 | 1/2" | 1/4" | 20 |
M4THS1724A11NA | M4MHW1724A1N0A | 17 | 10 | 11.25 | 22000 | 24000 | 208‑230/60/1 | 5/8" | 1/4" | 30 |
17 SEER AC Single Zone Ductless Systems
Outdoor | Indoor | SEER | HSPF | EER | Cooling Capacity (BTUH) | Heating Capacity (BTUH) | Voltage | Gas Line | Liquid Line | Max Overcurrent Protection |
M4TCS1709A11NA | M4MCW1709A1N0A | 17 | - | 10.9 | 9100 | - | 208‑230/60/1 | 3/8" | 1/4" | 15 |
M4TCS1712A11NA | M4MCW1712A1N0A | 17 | - | 9.55 | 12000 | - | 208‑230/60/1 | 3/8" | 1/4" | 15 |
M4TCS1718A11NA | M4MCW1718A1N0A | 17 | - | 9.2 | 17400 | - | 208‑230/60/1 | 1/2" | 1/4" | 20 |
M4TCS1724A11NA | M4MCW1724A1N0A | 17 | - | 10.95 | 22000 | - | 208‑230/60/1 | 5/8" | 1/4" | 30 |
SEER, or Seasonal Energy Efficiency Ratio, measures how efficiently a unit can cool your home in the summer. The higher the SEER number, the less energy you'll use.
RunTru Limited Warranty: 5-year limited warranty for functional parts 10-year warranty for functional parts with registration 20-year warranty for heat exchanger
Find out more about the RunTru Limited Warranty here.

15 SEER Multi-Zone Ductless System
- Mix and match up to 5 indoor units to achieve 42K BTUH heating and cooling
- Outdoor sound range of 56-59 dB
- Port adapters included
- 9000, 12000, 18000, & 24000 BTUH high wall mounted indoor models available
- Hand held remote controller included with each indoor unit
- Inverter driven (Variable Speed Compressor)
- Blue Fin Coastal coating
- AHRI Certified System
Ductless Systems
15 SEER Multi-Zone Outdoor Heat Pump
Outdoor | SEER | HSPF | EER | Cooling Capacity (BTUH) | Heating Capacity (BTUH) | Voltage | Number of Ports | Gas Line | Liquid Line | Max Overcurrent Protection |
M4THM1518A12N | 15 | 8.2 | 10.00 | 18000 | 19000 | 208‑230/60/1 | 2 | 3/8" (2) | 1/4" (2) | 20 |
M4THM1524A13N | 15 | 8.2 | 8.00 | 26000 | 29000 | 208‑230/60/1 | 3 | 3/8" (3) | 1/4" (3) | 30 |
M4THM1530A14N | 15 | 8.2 | 8.00 | 29000 | 30400 | 208‑230/60/1 | 4 | 3/8" (4) | 1/4" (4) | 45 |
M4THM1536A14N | 15 | 8.2 | 7.75 | 34000 | 35800 | 208‑230/60/1 | 4 | 3/8" (2) 1/2" (1) 5/8" (1) | 1/4" (3) 3/8" (1) | 45 |
M4THM1542A15N | 15 | 8.2 | 9.1 | 40000 | 44500 | 208‑230/60/1 | 5 | 3/8" (2) 1/2" (2) 5/8" (1) | 1/4" (4) 3/8" (1) | 50 |
15 SEER High Wall Mounted Indoor Unit
Indoor | Nominal Capacity (BTUH) | Voltage | Gas Line | Liquid Line |
M4MHW1509A1N0 | 9000 | 208‑230/60/1 | 3/8" | 1/4" |
M4MHW1512A1N0 | 12000 | 208‑230/60/1 | 3/8" | 1/4" |
M4MHW1518A1N0 | 18000 | 208‑230/60/1 | 1/2" | 1/4" |
M4MHW1524A1N0 | 24000 | 208‑230/60/1 | 5/8" | 1/4" |
SEER, or Seasonal Energy Efficiency Ratio, measures how efficiently a unit can cool your home in the summer. The higher the SEER number, the less energy you'll use.
RunTru Limited Warranty: 5-year limited warranty for functional parts 10-year warranty for functional parts with registration 20-year warranty for heat exchanger
Find out more about the RunTru Limited Warranty here.
Ductless Systems

115 Volt Single-Zone Ductless System
- 9000 and 12000 BTUH models available
- Outdoor sound range of 50-52 dB
- Meets Energy Star Requirements
- Matches with current indoor highwall models
- Blue Fin Coastal coating
- Port adapters included
- Heating capability down to -13ºF (-25ºC)
- Handheld remote controller included
Ductless Systems
115 Volt Single Zone Ductless Systems
Outdoor | Indoor | SEER | HSPF | EER | Cooling Capacity (BTUH) | Heating Capacity (BTUH) | Voltage | Gas Line | Liquid Line | Max Overcurrent Protection |
M4THS2209A91N* | M4MHW2209A9N0* | 22 | 9.8 | 13.2 | 9000 | 9500 | 115/60/1 | 3/8" | 1/4" | 30 |
M4THS2212A91N | M4MHW2212A9N0 | 20 | 9.6 | 12 | 12000 | 13000 | 115/60/1 | 3/8" | 1/4" | 30 |
Energy Star rated system*
SEER, or Seasonal Energy Efficiency Ratio, measures how efficiently a unit can cool your home in the summer. The higher the SEER number, the less energy you'll use.
RunTru Limited Warranty: 5-year limited warranty for functional parts 10-year warranty for functional parts with registration 20-year warranty for heat exchanger
Find out more about the RunTru Limited Warranty here.