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Air Handler

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Carrier Air Handler ® Toshiba Variable Flow (VRF) 18,000 BTU Indoor Vertical Air Handler Unit

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Carrier Commercial Air Handler - MMD-UB Air Handler Repair, maintenance, and replacement planning

Technical Specifications

Product Specs

  • Model: MMD-UB0181VHN-UL
  • Manufacturer Number: MMD-UB0181VHN-UL
  • Vendor Number: MMD-UB0181VHN-UL
  • Catalog Brand: Toshiba Carrier
  • Product Family: MMD-UB
  • AHRI Usage: Indoor AHU
  • Brand: Toshiba Carrier
  • Country Of Origin: CHN
  • Cycle/Hertz: 60 Hz
  • Height: 45.8
  • Length: 19.6
  • Phase: Single
  • Prop 65: YES
  • Refrigerant: R-454B
  • Tonnage: 1.5
  • Voltage: 208-230 VAC
  • Weight: 56
  • Width: 22

Useful troubleshooting details

  • Confirm the exact model number, serial number, installed equipment type, and site voltage before service or replacement planning.
  • Match replacement equipment and accessories against current Carrier compatibility requirements, refrigerant type, capacity, airflow, and local code requirements.

Service planning

How GreenFlow handles Carrier® Toshiba Variable Flow (VRF) 18,000 BTU Indoor Vertical Air Handler Unit requests

1

Identify the equipment

Confirm the model or series name, serial number if available, photos, and whether the unit is roof, exterior, basement, or mechanical-room equipment.

2

Describe the service issue

Share no heat, no cooling, weak airflow, error codes, alarms, leaks, noise, control problems, or comfort complaints.

3

Review access and history

Include access notes, tenant or business-hour constraints, filter status, recent repairs, and maintenance records when available.

4

Plan the next step

GreenFlow can route the request for diagnostics, repair planning, maintenance, replacement scope, or related system upgrades.

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Sharad W.

Green Flow and the people who work there are terrific. Vlad and Andre are excellent. Andre was very helpful. He was punctual, respectful, efficient and knowledgeable. He did not try to sell me something I didn’t need ( as others have done before). I was charged $99 which...

Anna G.

They quickly identified the issue with the heating system and fixed it efficiently. He explained everything clearly and made sure I understood what was going on. Very professional and reliable, extremely satisfied with the service.

Jenny W.

Great service! On time, knowledgeable & professional

Neal V.

In an industry that often fraught with contractors taking advantage of homeowners, Andrey was honest with his assessment and willing to install a product acquired elsewhere (most want that margin themselves), patiently answered my questions (I’m an engineer so like to understand what’s happening), and proactively offered practical...

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