The Lennox 27K44 MMDD018S6-1P mini-split medium static ducted air handler is designed for applications where concealed installation and ducted air distribution are preferred. With a nominal 1.5 ton capacity, this indoor unit delivers quiet, efficient airflow while maintaining a clean, low-profile appearance behind ceilings or within conditioned spaces. It is engineered to pair with compatible Lennox mini-split outdoor units, making it a reliable solution for residential and light commercial HVAC systems requiring flexible duct layouts.

This medium static ducted air handler supports higher external static pressure than low-static models, allowing it to serve multiple supply outlets while maintaining consistent airflow. Its slim cabinet design helps simplify installation in tight spaces such as soffits, attics, or mechanical closets. Built to Lennox quality standards, the MMDD series is designed for long-term reliability, efficient operation, and seamless system integration.

Product Overview
The Lennox MMDD018S6-1P ducted air handler provides hidden comfort with the performance advantages of modern mini-split technology. It is ideal for applications where wall-mounted or ceiling cassette units are not desired, offering a discreet solution with uniform air distribution. Designed for medium static pressure applications, this unit is well suited for short to moderate duct runs while maintaining quiet operation and efficient airflow control.

 

Specifications:

Manufacturer: Lennox
Catalog Number: 27K44
Model Number: MMDD018S6-1P
Cooling Capacity: 1.5 Ton
Voltage: 208–230 VAC
Phase: 1 Phase
Frequency: 60 Hz
System Type: Mini-Split Indoor Air Handler
Configuration: Medium Static Ducted
Installation Type: Concealed ducted indoor unit
Application: Residential and light commercial HVAC systems