RunTru 18 SEER Single-Zone Low Ambient Ductless System

Item No. M4TLS18/M4MLW18
RunTru’s single-zone low-ambient ductless system performs efficiently under extreme conditions. It can cool interior spaces even when outdoor ambient temperatures fall as low as 0° F, or generate heat when they’re as low as -13° F.
  • Available for installations in all regions
  • Quiet operations (39-52 db)
  • Handheld remote control included
  • 9000, 12000, 18000, 24000 BTUH models available


Ductless System
  • Available for installations in all regions (18 SEER)
  • 9000, 12000, 18000 & 24000 BTUH models available
  • Outdoor sound range (39-52 db)
  • Cooling capabilities at outdoor ambient temperatures as low as 0° F & heating capabilities at outdoor ambient temperatures as low as -13° F.
  • Inverter driven (Variable Speed Compressor) for efficiency and consistent comfort
  • Includes base pan heaters to protect the condenser against ice
  • Blue Fin Coastal coating for durability and protection against the elements
  • AHRI Certified Systems

Product Specs

18 SEER Single-Zone Low Ambient Ductless System

Outdoor Indoor SEER HSPF EER Cooling Capacity (BTUH) Heating Capacity (BTUH) Voltage Gas Line Liquid Line Max Overcurrent Protection
M4TLS1809A11N M4MLW1809A1N0 18.5 10.2 10.6 9200 10000 208-230/60/1 3/8" 1/4" 15
M4TLS1812A11N M4MLW1812A1N0 18.5 9.2 10.4 12100 12900 208-230/60/1 3/8" 1/4" 15
M4TLS1818A11N M4MLW1818A1N0 18.0 9.2 9.9 17800 20000 208-230/60/1 1/2" 1/4" 25
M4TLS1824A11N M4MLW1824A1N0 18.4 10.5 11.0 22800 25000 208-230/60/1 5/8" 1/4" 25

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.

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RunTru Installation

Installed by a Preferred RunTru Dealer
  • Systems are installed by trained service technicians who know your equipment best.
  • Trained service technicians will also ensure that the installation confirms to local, state and national building codes.
Peace of Mind
  • Prior to installation, your RunTru service technician will perform a thorough evaluation of your home to ensure the perfect system fit.
  • After installation, your service technician will walk you through the features and functions of your new system, and answer any questions you might have.

Warranty Information

Relax. RunTru is backed by a Warranty you can trust.
  • RunTru offers coverage and peace of mind where it counts- with the hardest-working components of the system covered for the long haul.
Limited Parts Warranty
  • Equipment: Base Limited Warranty Period: 5 years Functional parts
  • If you do not register your RunTru system, it will be covered by our Base Limited Parts Warranty.
Registered Limited Parts Warranty
  • Equipment: Registered Limited Warranty Period: Functional Parts - 10 years; Heat Exchanger - 20 years
  • Cased Coils: 10 year Functional Parts Warranty, no registration required
  • Registered Limited Warranty terms are applicable if the products are registered within 60 days of installation.