(800)865-5931 Mon-Fri 7am-7pm, Sat 9am-2pm CT
EST. 2002
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The Comfort-Aire SMA24SB-1 has been discontinued.
Please call us for a suitable alternate product.

(800) 865-5931

Mon-Fri 7am-7pm, Sat 9am-2pm CT

Comfort-Aire's “S” Series, rated at 13 SEER, offers economical zone control because only the room or area being used is conditioned. Also, no energy is used to force air through a duct system. Since the unit is independent of any other heating or cooling system, specific comfort requirements can be set for the space. A wireless remote makes it easy to select both temperature and mode. The indoor air handler features a sleek design that extends just 9” to 12” into the room, depending on the model. For installation flexibility, the indoor section can be located up to 65 feet from the outdoor section. Not only is the air handler visually unobtrusive, it’s also so quiet you’ll forget it’s even there. Fan speed and mode can be selected so the air flow provides the comfort needed without being disruptive. The 18,000 BTU models feature four fan speeds; other models have three fan speeds. Built with quality components, the system includes a three minute delay at start-up to protect the compressor from short cycling.


  • Whisper Quiet—High tech, cross flow fan in the indoor unit delivers balanced air flow
  • Temperature Compensation—Indoor unit adjusts automatically as needed to eliminate temperature stratification between ceiling and floor temperature
  • Random Swing—Continually adjusts air direction for a gentle, breeze-like effect
  • Multiple Modes—Cooling, dehumidification only, air circulation (heating in heat pump models) plus Sleep mode, 24-hour timer, and Jet Cool for fast cool-down
  • Hot Start—On heat pump models, eliminates cool air release when unit turns on
  • Auto Operation—Automatically adjusts to maintain a constant temperature/humidity level
  • Multi-Stage Filtration—Triple filtration system includes electrostatic filter, antifungal filter and deodorizing filter
  • Auto Restart—Reverts to the last setting following a power failure

Important Addition to Installation Instructions

Complete your system by selecting a line set from the Accessories tab above.  Line sets come in 15 foot, 35 foot, and 50 foot lengths.

Total Cooling Capacity BTU

The total amount of cooling delivered by the system. This number is inclusive of all interior air handlers.

Total Cooling Capacity BTU
24000 BTU
Total Cooling Capacity
2 Ton(s)
Tons per Zone

The amount of cooling delivered into the space by each air handler rated in tons.

Tons per Zone

Seasonal Energy Efficiency Ratio (SEER) is a measure of cooling over an entire season. It is determined by comparing the amount of cooling produced in BTUs in relation to the amount of electricity used. A higher SEER means a system is more energy efficient and would provide comfort at a lower utility cost than a lower SEER system.

Maximum Ambient Temperature
113 °F

Inside air conditioning systems are liquid/gas refrigerant. There are two types of this refrigerant available for use, R-22 (more commonly known as Freon), and a newer alternative R-410A.

An air conditioning system does not consume refrigerant, but reuses it. As long as there are no leaks in the refrigerant circuit, there is no need to ever add more refrigerant to an air conditioning system.

Although R-22 is an effective refrigerant, if it is released into the atmosphere it can contribute to the depletion of the Earth’s ozone layer. The EPA has mandated the phasing out the use of R-22. It is being replaced by R-410A.

As of 2010, manufacturers are required to make all new air conditioners with R-410A. However, R-22 is still available for sale in existing pre-2010-manufactured equipment, and for use in servicing existing R-22 equipment. By 2020, R-22 will no longer be manufactured, but will still be recycled and available for sale.

Moisture Removal

The amount of water that can be removed from the air rated in pints per hour.

Moisture Removal
5.3 Pts/Hr
Factory Precharge

This unit is charged with enough refrigerant for the condensing unit evaporator coil and the length of line stated. Longer line sets can be used but would require some additional refrigerant for appropriate operation.

Factory Precharge
16 Feet
Power Usage (Cooling)
8.8 amps
Minimum Ampacity
18 Amps
Maximum Fuse/Breaker

The maximum capacity breaker that the unit can be connected to (This is the best option for consistent performance)

Maximum Fuse/Breaker
20 Amps
Wiring Requirement for Indoor Unit

The wiring recommended to connect the outdoor unit to the interior air handler.

Wiring Requirement for Indoor Unit
Line Voltage
Maximum Line Length

The maximum length of line set approved for use with this product.

Maximum Line Length
65.6 Feet
Maximum Height Difference

The maximum vertical distance between the condensing unit and the air handler.

Maximum Height Difference
32.8 Feet
Line Set Connection Type

There are two main types of connections for HVAC products brazed and flared. Brazed connections are typically used in standard split systems, and flare connections are typically used on mini splits and can be connected using a wrench.

Line Set Connection Type
Fan Speeds
ENERGY STAR® Qualified

Products earn the ENERGY STAR label by meeting the energy efficiency requirements set forth in ENERGY STAR specifications. The EPA establishes these specifications based on the following set of principles:

  • Product categories must contribute significant energy savings nationwide.
  • Qualified products must deliver the features and performance demanded by consumers, in addition to increased energy efficiency.
  • If the qualified product costs more than a conventional, less-efficient counterpart, purchasers will recover their investment in increased energy efficiency through utility bill savings, within a reasonable period of time.
  • Energy efficiency can be achieved through broadly available, non-proprietary technologies offered by multiple manufacturers.
  • Product energy consumption and performance can be measured and verified with testing.
  • Labeling would effectively differentiate products and be visible for purchasers.

ENERGY STAR® Qualified

The number of interior air handlers connected to the condensing unit. Typically one, two, or three zones.

Liquid Line Connection Size

The outside diameter of the liquid line pipe (the inside diameter of the connection on the equipment).

Liquid Line Connection Size
3/8 Inches
Suction Line Connection Size

The outside diameter of the suction line (the inside diameter of the connection on the equipment).

Suction Line Connection Size
5/8 Inches
Drain Tubing Connection
1/2 inches (I.D.)
Indoor Section Size, W x H x D
49.2 x 12.8 x 9.1 Inches
Outdoor Section Size, W x H x D
35.2 x 33.9 x 13 Inches
Indoor Section Weight
55 Lbs
Outdoor Section Weight
160 Lbs
208 / 230 Volts
60 Hz
Voltage Phase