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Day & Night Gas furnace F80CSU-40,000 BTU/h input

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Day & Night Day & Night AHRI Furnace - Ion 80 Ultra Low NOx Gas Furnace Gas furnace Repair, maintenance, and replacement planning
Day & Night F80CSU-40,000 BTU/h input product image

Technical Specifications

Product Specs

  • AHRI unit role: Furnace
  • AHRI model/pattern: *80CSU0401712A*
  • AHRI records represented: 64
  • AHRI equipment type: Central HP
  • AHRI tonnage: 1.9
  • AHRI refrigerant: R-454B
  • Verified catalog model: *80CSU0401712A*
  • Verified product family: Ion 80 Ultra Low NOx Gas Furnace
  • Verified catalog brand: Day & Night
  • Verified model family: F80CSU
  • AHRI model/pattern: *80CSU0401712A*
  • Nominal input: 40,000 BTU/h input
  • AFUE family: 80%
  • Heating stages: single-stage
  • Blower: variable-speed
  • NOx classification: ultra-low NOx
  • Cabinet width code: 17
  • Application: matched gas furnace for split-system air conditioner or heat pump combinations
  • Official product page: https://www.dayandnightcomfort.com/en/us/products/gas-furnaces/ion-80-ultra-low-nox-gas-furnace

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 215666970

AHRI 215666970 identifies a Mass Save qualified Central HP <5.4 tons from DAY & NIGHT with outdoor unit C5H0V24*K*AAA* and indoor unit EA*5X24M17A*+WALLCON.
Eligible Central HP <5.4 tons

AHRI 215667153

AHRI 215667153 identifies a Mass Save qualified Central HP <5.4 tons from DAY & NIGHT with outdoor unit C5H0V24*K*AAA* and indoor unit EA*5X25M17A*+WALLCON.
Eligible Central HP <5.4 tons

AHRI 215667370

AHRI 215667370 identifies a Mass Save qualified Central HP <5.4 tons from DAY & NIGHT with outdoor unit C5H0V24*K*AAA* and indoor unit EA*5X30M17A*+WALLCON.
Eligible Central HP <5.4 tons

AHRI 215667568

AHRI 215667568 identifies a Mass Save qualified Central HP <5.4 tons from DAY & NIGHT with outdoor unit C5H0V24*K*AAA* and indoor unit EA*5X36M17A*+WALLCON.
Eligible Central HP <5.4 tons

AHRI 215667728

AHRI 215667728 identifies a Mass Save qualified Central HP <5.4 tons from DAY & NIGHT with outdoor unit C5H0V24*K*AAA* and indoor unit EA*5X37M17A*+WALLCON.
Eligible Central HP <5.4 tons

AHRI 215667816

AHRI 215667816 identifies a Mass Save qualified Central HP <5.4 tons from DAY & NIGHT with outdoor unit C5H0V24*K*AAA* and indoor unit EA*5X37M21A*+WALLCON.
Eligible Central HP <5.4 tons

AHRI 215668536

AHRI 215668536 identifies a Mass Save qualified Central HP <5.4 tons from DAY & NIGHT with outdoor unit C5H0V36*K*AAA* and indoor unit EA*5X37M17A*+WALLCON.
Eligible Central HP <5.4 tons

AHRI 215668632

AHRI 215668632 identifies a Mass Save qualified Central HP <5.4 tons from DAY & NIGHT with outdoor unit C5H0V36*K*AAA* and indoor unit EA*5X37M21A*+WALLCON.
Eligible Central HP <5.4 tons

AHRI 215668792

AHRI 215668792 identifies a Mass Save qualified Central HP <5.4 tons from DAY & NIGHT with outdoor unit C5H0V36*K*AAA* and indoor unit EA*5X42M21A*+WALLCON.
Eligible Central HP <5.4 tons

AHRI 215668952

AHRI 215668952 identifies a Mass Save qualified Central HP <5.4 tons from DAY & NIGHT with outdoor unit C5H0V36*K*AAA* and indoor unit EA*5X43M21A*+WALLCON.
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Service planning

How GreenFlow handles F80CSU-40,000 BTU/h input 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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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

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...

John F.

I needed 2 new AC units and decided to go with high efficiency heat pumps. I chose Greenflow because of the equipment they offered, and the price (2nd lowest quote and much cheaper than the average of all quote we received). Their technicians were very detail oriented and...

Anna F.

They showed up within an hour of me making the call on a Sunday. They fixed our system and taught us how to replace the fuse in the future. We would definitely call again.

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