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Heat pump condensing unit

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Day & Night Heat pump condensing unit D5CUHAH18AAK

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Day & Night Day & Night AHRI Outdoor - QuietComfort Compact Crossover Heat Pump Heat pump condensing unit Repair, maintenance, and replacement planning
Day & Night D5CUHAH18AAK product image

Technical Specifications

Product Specs

  • AHRI unit role: Outdoor
  • AHRI model/pattern: D5CUHAH18AAK
  • AHRI records represented: 170
  • AHRI equipment type: Central HP
  • AHRI tonnage: 1.5
  • AHRI refrigerant: R-454B
  • Verified catalog model: D5CUHAH18AAK
  • Verified product family: QuietComfort Compact Crossover Heat Pump
  • Verified catalog brand: Day & Night
  • Verified model family: D5CUHAH
  • AHRI model/pattern: D5CUHAH18AAK
  • Nominal capacity: 1.5 ton
  • Nominal cooling capacity: 18,000 BTU nominal cooling capacity
  • Cooling efficiency: up to 19 SEER2
  • Heating efficiency: up to 10.8 HSPF2
  • Compressor: variable-speed compact crossover
  • Refrigerant: R-454B
  • Sound level: as low as quiet performance
  • Capacity range: 1.5-5 tons within the official family
  • Official product page: https://www.dayandnightcomfort.com/en/us/products/crossover-solutions/d5cuha

Useful troubleshooting details

  • Confirm the installed model and serial number, matched indoor or outdoor equipment, voltage, refrigerant, controls, and AHRI certificate before service or replacement planning.
  • Use the linked AHRI certificates to verify matched-system combinations, rebate conversations, and equipment eligibility before quoting replacement work.
  • Collect photos of the nameplate, equipment access, recent fault history, and comfort symptoms before dispatch or proposal planning.

Certification match

AHRI certificates

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Eligible Central HP <5.4 tons

AHRI 215318943

AHRI 215318943 identifies a Mass Save qualified Central HP <5.4 tons from DAY & NIGHT with outdoor unit D5CUHAH18AAK and indoor unit D5FUAAH18XAK.
Eligible Central HP <5.4 tons

AHRI 215318957

AHRI 215318957 identifies a Mass Save qualified Central HP <5.4 tons from DAY & NIGHT with outdoor unit D5CUHAH18AAK and indoor unit D5FUHAH24XAK.
Eligible Central HP <5.4 tons

AHRI 217399836

AHRI 217399836 identifies a Mass Save qualified Central HP <5.4 tons from DAY & NIGHT with outdoor unit D5CUHAH18AAK+TIC2025-0016 and indoor unit FTMA5X24L0B*.
Eligible Central HP <5.4 tons

AHRI 217399847

AHRI 217399847 identifies a Mass Save qualified Central HP <5.4 tons from DAY & NIGHT with outdoor unit D5CUHAH18AAK+TIC2025-0016 and indoor unit FMA5X24**AL*.
Eligible Central HP <5.4 tons

AHRI 217399858

AHRI 217399858 identifies a Mass Save qualified Central HP <5.4 tons from DAY & NIGHT with outdoor unit D5CUHAH18AAK+TIC2025-0016 and indoor unit FMA5X18**AL*.
Eligible Central HP <5.4 tons

AHRI 217399869

AHRI 217399869 identifies a Mass Save qualified Central HP <5.4 tons from DAY & NIGHT with outdoor unit D5CUHAH18AAK+TIC2025-0016 and indoor unit FM(C,U)5Z30**AL*.
Eligible Central HP <5.4 tons

AHRI 217399880

AHRI 217399880 identifies a Mass Save qualified Central HP <5.4 tons from DAY & NIGHT with outdoor unit D5CUHAH18AAK+TIC2025-0016 and indoor unit FM(C,U)5Z24**AL*.
Eligible Central HP <5.4 tons

AHRI 217399891

AHRI 217399891 identifies a Mass Save qualified Central HP <5.4 tons from DAY & NIGHT with outdoor unit D5CUHAH18AAK+TIC2025-0016 and indoor unit FM(C,U)5Z18**AL*.
Eligible Central HP <5.4 tons

AHRI 217399912

AHRI 217399912 identifies a Mass Save qualified Central HP <5.4 tons from DAY & NIGHT with outdoor unit D5CUHAH18AAK+TIC2025-0016 and indoor unit FHMA5*18L*A*.
Eligible Central HP <5.4 tons

AHRI 217399924

AHRI 217399924 identifies a Mass Save qualified Central HP <5.4 tons from DAY & NIGHT with outdoor unit D5CUHAH18AAK+TIC2025-0016 and indoor unit FEVB0024**+NAVA53601CK.
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Service planning

How GreenFlow handles D5CUHAH18AAK 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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Michele Z.

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

Dev W.

I had a breakdown of my cooling system and Hanna at Green Flow responded to my request right away. They scheduled me same day. The team at Green Flow was easy to communicate with over phone and text. They kept me updated on delays on arrival of the...

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.

Terry S.

Excellent service from best tech!

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