Oklahoma Air Heating and Cooling - Products

Ductless Systems - Middle Static Pressure Duct

These compact units are easy to install. Internal drain pumps are factory installed.  These models can be ducted to supply conditioned air to multiple rooms.

  • R-410A refrigerant
  • Capacity 7 - 48 MBH
  • Sound pressure rating as low as 26 dBa
  • Static pressure up to 0.60"" wg for 7,9, 12, 15 and 18 MBH models
  • Static pressure up to 0.80"" wg for 24, 27, 30, 36 and 48 MBH models
  • Multi room applications
  • Factory installed condensate pump
  • Use VRF Select for system validation

Designed for single and multi room residential applications with higher static needs than the slim ducted product .

Ships with an internal drain pump standard .

Capacity ranges from 7500 BTUH to 48000 BTUH (nominal capacity).


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Variable Refrigerant Flow (VRF) Indoor Unit
Indoor variable refrigerant flow systems are available in a variety of configurations
Slim Duct Unit
Ceiling Suspended Unit
High Wall Unit
Four-Way Cassette
Mini Four-Way Cassette
Slim One-Way Cassette
Middle Static Pressure Duct
Multi Zone Multi-Split (Outdoor Systems)
Up to five individual indoor zones
4TXM22
4TXM6
4MXF8
MXZ Outdoor Unit
Variable Refrigerant Flow (VRF) Outdoor Unit
Connect multiple indoor zones or areas to one outdoor unit
VRF Outdoor Unit