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Carrier Heat Pump Ductless 18000 Btuh High Wall Indoor Heat Pump Unit (less Sensor) R-454B (208/230-1)

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Carrier Residential Heat Pump - 45MHHAQ Heat Pump Repair, maintenance, and replacement planning
Carrier Ductless 18000 Btuh High Wall Indoor Heat Pump Unit (less Sensor) R-454B (208/230-1) product image

Technical Specifications

Product Specs

  • Model: 45MHHAQ18XC3
  • Manufacturer Number: 45MHHAQ18XC3
  • Vendor Number: 45MHHAQ18XC3
  • Catalog Brand: Carrier®, Bryant®, Payne®
  • Product Family: 45MHHAQ
  • AHRI Usage: Indoor AHU
  • Blower Motor HP: 1/30
  • Blower Motor RPM: 1,200
  • Blower Motor Speeds: 4
  • Blower Motor Type: ECM (Electronically Commutated Motor)
  • Blower Motor Watts: 70
  • Blower Wheel Diameter: 3 9/10
  • Blower Wheel Width: 29 4/5
  • Brand: Carrier®, Bryant®, Payne®
  • CFM: 271-400
  • CFM Heating: 270.7-400.2
  • COP: 2.3
  • Color: White
  • Cooling Capacity: 18,600
  • Cooling Rated Capacity Btu/h: 18000
  • Country Of Origin: CHN
  • Cycle/Hertz: 60 Hz
  • Drain Connection Size: 5/8"
  • EER2: 12.5
  • Energy Star Rated: YES
  • Evaporator Coil Fins Per Inch (FPI): 20
  • HSPF: 11
  • HSPF2: 10
  • Heating Capacity: 19,200-19,200
  • Height: 12.6
  • Length: 8.9
  • Liquid Line Fitting Type: Flare
  • Liquid Line Size (OD): 1/4"
  • Metering Device: EEV - Electronic Expansion Valve
  • Mounting Type: Wall-Mount
  • Multi Zone: NO
  • Number Of HVAC Zones: 1
  • OPT Code: 1P45MHHAQ18XC3
  • Phase: Single
  • Prop 65: YES
  • Refrigerant: R-454B
  • Remote Control Included: YES
  • SEER2: 23-24
  • Sound Level (dBA): 19-45
  • Stages Cooling: Variable
  • Stages Heating: Variable
  • Suction Line Fitting Type: Flare
  • Suction Line Size (OD): 1/2"
  • Tier: Comfort™
  • Tonnage: 1.5
  • Voltage: 208-230 VAC
  • Weight: 32.8
  • Width: 38.2

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 Ductless 18000 Btuh High Wall Indoor Heat Pump Unit (less Sensor) R-454B (208/230-1) 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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Our Happy Customers

Michael C.

always available, easy to get a hold of, as a property manager I get lots no heat emergency, usually get to it same day or next day

Michele Z.

Andrey was professional, prompt, smart, thorough and exceedingly pleasant. We are likely switching our current HVAC company to Green Flow.

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

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