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The R-410A LETO: a warranty that depends on the model-number ending.

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Previous generation
Senville · LETO Series · R-410A

Senville LETO R-410A wall heat pump: the warranty by model ending

At Senville, the warranty on an R-410A LETO is read from its model-number ending: 5 years on the compressor in every case, but 2 years on parts for IX / OX, against 5 years for IY / OY. Only one of our four R-410A LETO listings, the 18,000 BTU/h, has an AHRI certificate: 10,100 BTU/h at −15 °C, no ENERGY STAR record, so no LogisVert.

LETO Series · R-410AIX, OX, IY, OY endings9,000 to 24,000 BTU/h1 AHRI certificate across 4 listings
Decode your model endingBook my free estimate
Updated October 26, 2026 · NEEP, ENERGY STAR, Hydro-Québec and the Senville help centre
LETO 18,000 BTU/h · rated heat
At 18,000 BTU/h, the R-454B keeps more heat below freezing
18,80018,800
11,50014,000
10,10011,500
8.3 °C−8.3 °C−15 °C
R-410A · IY / OYR-454B · ILL / OL

BTU/h. NEEP, AHRI certificates 207613967 (R-410A) and 215735290 (R-454B), read October 14, 2026 and re-checked unchanged October 26, 2026.

5 yearson the compressor, IX / OX and IY / OY endings alike
2 or 5 yearson parts: 2 for IX / OX, 5 for IY / OY
1 of 4of our R-410A LETO listings has an AHRI certificate: the 18,000 (207613967)
10,100BTU/h at −15 °C, COP 2.10, for that certified LETO 18,000

This page answersR-410A LETO owners, and buyers still choosing one: which Senville warranty applies by IX / OX or IY / OY ending, what the one certified pair really delivers, and why none of them earns LogisVert.

The R-410A LETO shop

The 4 R-410A LETO units in our catalogue, further down.

Four sizes, 9,000, 12,000, 18,000 and 24,000 BTU/h; prices on quotation. The R-454B LETO has its own page, with an AHRI certificate for every size.

See the R-454B LETO
SENVILLE
01 · Warranty by ending

Which warranty for which ending: the R-410A LETO decoder

Senville publishes two tables: one says which series and refrigerant each ending belongs to, the other which warranty goes with it. Here they are side by side for the LETO, with nothing added.

  • SENLPrefixLETO series
  • 18Numbersize: 18,000 BTU/h
  • CDMiddle lettersnot explained by Senville
  • IYEndinggeneration and unit type

Example: the indoor unit of our R-410A LETO 18,000, as NEEP lists it. Senville puts the grey label on the right flank of the indoor unit and on a flank of the outdoor unit; for a manual or an error code, it asks for the indoor number.

IXOX
R-410ALETO wall unit · “Earlier generations” row
Compressor5 years
Parts2 years
Manualsuser IX/OX · installation IX/OX · service L/IZ/OZ/MOZ/IX/OX
IYOY
R-410ALETO wall unit · “Current models” row
Compressor5 years
Parts5 years
Manualsuser IY/OY · installation IY/OY · service L/IQ/OQ/MOQ/IY/OY
ILLOL
R-454BLETO wall unit · the current LETO
Compressor5 years
Parts5 years
Manualsuser, installation and service ILL/OL · R-454B LETO page

Our four R-410A LETO listings, placed on the decoder

LETO R-410A · 9,000 BTU/hSENL-09CDNo ending on our listingparts: 2 years (IX / OX) or 5 years (IY / OY), per the labelLETO R-410A · 12,000 BTU/hSENL-12CDNo ending on our listingparts: 2 years (IX / OX) or 5 years (IY / OY), per the labelLETO R-410A · 18,000 BTU/hSENL/18CD/OY + SENL/18CD/IYIY / OY: 5 years compressor, 5 years partsper the certificate on our listing; the label decidesAHRI certificate 207613967LETO R-410A · 24,000 BTU/hSENL-24CDNo ending on our listingparts: 2 years (IX / OX) or 5 years (IY / OY), per the label
And the law?

The ending settles the Senville warranty, not the legal one. Since October 5, 2026, a new heat pump bought by a Quebec consumer carries 6 years of good working order, parts and labour, counted from delivery and with no registration, according to the fr.senville.ca “Modalités de garantie” page. An R-410A LETO sold or delivered before that date falls outside this 6-year warranty, Senville writes; sections 37 and 38 of Quebec’s Consumer Protection Act then apply. All warranty terms

The 2019 catalogue writes SENL-09CD/1 to SENL-24CD/1, and the “2023 Residential” brochure (© 2019) uses /I, /O and /X suffixes: none of these forms appears in Senville’s tables. Only the label settles it. Senville help centre: the endings page, the warranty table and the LETO manuals page, all three modified October 8, 2026 and re-read by us October 26, 2026.

02 · The certified 18,000

R-410A LETO 18,000: the only certified rating plate on this page

The SENL/18CD/OY + SENL/18CD/IY pair has an AHRI certificate and a NEEP record. Here is what it holds, figure by figure, then the gap with the R-454B LETO of the same capacity.

LETO R-410A · 18,000 BTU/h

AHRI 207613967

SENL/18CD/OY + SENL/18CD/IY
Previous generation

Certification

CertificateAHRI 207613967NEEP record modified August 24, 2026
ENERGY STARno record
RefrigerantR-410ANEEP; Senville lists IY / OY as R-410A

Efficiency

SEER2 · EER219 · 10.5
HSPF2, regions IV · V8.7 · 6.8
Rated cooling18,000 BTU/h · COP 3.08

Heating, rated capacity

8.3 °C18,800 BTU/h · COP 2.92
−8.3 °C11,500 BTU/h · COP 2.57
−15 °C10,100 BTU/h · COP 2.10
−15 °C (maximum)12,050 BTU/h · COP 2.18
Coldest published point−15 °C5 °F

Program and warranty

LogisVert, indicativenot on the list
Senville warranty (IY / OY)5 years compressor · 5 years parts
See our R-410A LETO 18,000 listingNEEP, read October 14, 2026, re-checked October 26, 2026.

Against the R-454B LETO of the same capacity

SENL-18CD-OL + SENL-18CD-ILL · AHRI 215735290

  • +2,500BTU/h more for the R-454B at −8.3 °C: 14,000 against 11,500.
  • +1,400BTU/h more at −15 °C: 11,500 against 10,100.
  • 54%of its 8.3 °C heat kept at −15 °C by the R-410A, against 61% for the R-454B; both deliver 18,800 BTU/h at 8.3 °C.
  • 6.8HSPF2 region V of the R-410A, against 7.5; SEER2 19 against 19.2.
  • $0of LogisVert for either one: neither the R-410A nor the R-454B 18,000 BTU/h has an ENERGY STAR record.

See the R-454B LETO 18,000

NEEP, AHRI 207613967 and 215735290; Hydro-Québec’s LogisVert tool; read October 14, 2026, re-checked unchanged October 26, 2026. Percentages: rated capacity at −15 °C divided by rated capacity at 8.3 °C.

The ENERGY STAR registry holds two other R-410A LETO pairs, both 9,000 BTU/h and ending in IY / OY (SENL/09CD/OY + IY and SENL/09CD220/OY + IY), without the cold-climate mention. Our listings do not tell whether our LETO 9,000 is one of them; under 12,000 BTU/h of cooling, neither earns LogisVert.

03 · Documents and conflicts

What the 2019 documents said, and what does not match

Senville’s catalogue and brochure both carry a “© 2019” notice and number the R-410A LETO differently from the IX / OX and IY / OY labels. We quote them without mixing them with the certified figures.

Senville 2019 catalogue · LETO page

An R-410A LETO numbered SENL-09CD/1 to SENL-24CD/1

Capacities9,000 · 12,000 · 18,000 · 24,000 BTU/h
RefrigerantR-410A
Printed SEER15, for all four sizes
Printed HSPF, region IV8.5, for all four sizes

R-410A charge printed, by size (BTU/h)

9,000799 g28.2 oz
12,000961 g33.9 oz
18,0001,500 g52.9 oz
24,0001,800 g63.5 oz

Functions named

“Follow Me”“46˚F Heating”“Vacation (Low Heat) Mode”“Low Ambient Cooling”“Sleep Mode”“Plasma Ionizer”“High Density Filter”“Wifi Remote Access Module (Optional)”

What does not match, and what this page does

Efficiency indices

2019 catalogue: SEER 15 and HSPF 8.5, on rows Senville labels “BTU/h”.

NEEP, 18,000 IY / OY: SEER2 19 and HSPF2 8.7 (region IV).

Two indices, two numbering schemes: we do not compare them.

Refrigerant charge

2019 catalogue: 799 to 1,800 g depending on size, for the /1 models.

Certified SENL/18CD/OY + IY pair: charge not published.

We do not carry the 2019 charge over to the certified pair.

Installation manual

The “manual” link on some senville.ca LETO pages serves a 2016 R-410A manual, code CS372I-AF, without saying which product it covers.

The help centre publishes R-410A installation manuals for “IX/OX” and “IY/OY”.

Use the help-centre manual that names your ending.

Sources: Senville “2019 Residential Air Conditioners Heat Pumps” catalogue and “2023 Residential” brochure (© 2019), senville.ca LETO pages and manual CS372I-AF (2016), read October 14, 2026; help-centre manuals checked October 26, 2026; ounce conversion: grams divided by 28.35.

Questions

Manual, voltage, parts, Follow Me: four questions from R-410A LETO owners

Which manual fits my R-410A LETO?

The one for its ending. On the “LETO Series Installation & Service Manuals” page, Senville publishes for R-410A a user manual and an installation manual for “IX/OX”, the same for “IY/OY”, and two service manuals covering “L/IZ/OZ/MOZ/IX/OX” and “L/IQ/OQ/MOQ/IY/OY”. Read the indoor unit’s number: that is the one Senville asks for, for manuals and error codes.

Senville pages “LETO Series Installation & Service Manuals” and “How do I find my model number and the right manual?” (modified October 8, 2026, read October 26, 2026).
Is my 9,000 or 12,000 BTU/h R-410A LETO a 115 V unit?

According to Senville’s “2023 Residential” brochure (© 2019), yes: 115 V for these two sizes, 208–230 V for the 18,000 and 24,000. The unit’s label decides, and we check it before preparing a quote.

Senville “2023 Residential” brochure (© 2019), read October 14, 2026; airgreen.ca product listings, re-read October 26, 2026.
Can I still find parts for an IY or OY LETO?

Yes, fan motors at least. fr.senville.ca sells the “Moteur de Ventilateur Intérieur – Séries AURA et LETO (SENL/18CD/IY - SENL/18CD/IX - SENA/18HF/IQ)” (indoor fan motor), which also names the IX ending, and the “Moteur de Ventilateur Extérieur – Série LETO (SENL/09CD/OY - SENL/12CD/OY)” (outdoor fan motor). Match the number on your label with the one in the title before ordering.

fr.senville.ca, “Moteurs” category, read October 26, 2026.
Does my R-410A LETO have Follow Me?

Senville’s 2019 catalogue names “Follow Me” among the R-410A LETO’s functions. The help centre confirms that AURA and LETO remotes have it (press SET until the icon flashes, then OK), but names no remote; its remote article covers only the CR322 (ILL) and the CR333 (IGG, IAA), no R-410A ending.

Question published by Senville: “Do AURA and LETO remote controls have Follow Me?”, and its remote article (modified October 8, 2026, read October 26, 2026); 2019 catalogue.
AirGreen
AirGreen × SENVILLE

Your R-410A LETO: the ending first, the quote second.

Before any quote, we read the grey label on both units on site: the ending tells which Senville warranty still runs. If a replacement is needed, we show you the R-454B LETO of the same capacity, AHRI certificate in hand.

Book my free estimate514 316-2973

Sources

  1. Senville help centre (modified October 8, 2026, read by us October 26, 2026): “LETO Series Installation & Service Manuals”, “How do I find my model number and the right manual?”, the “What is the warranty on Senville products?” table, “Do AURA and LETO remote controls have Follow Me?” and the remote article; fr.senville.ca, “Modalités de garantie”, read October 26, 2026.
  2. Senville, fr.senville.ca, “Moteurs” category: “Moteur de Ventilateur Intérieur – Séries AURA et LETO (SENL/18CD/IY - SENL/18CD/IX - SENA/18HF/IQ)” and “Moteur de Ventilateur Extérieur – Série LETO (SENL/09CD/OY - SENL/12CD/OY)”, read October 26, 2026.
  3. NEEP (ashp.neep.org): AHRI certificate 207613967, record modified August 24, 2026, and certificate 215735290; read October 14, 2026, re-checked unchanged October 26, 2026.
  4. ENERGY STAR, data.energystar.gov dataset w7cv-9xjt: all 116 Senville records, including 2411794, 2411795 and 3996085; read October 14, 2026, re-checked unchanged October 26, 2026.
  5. Hydro-Québec, list of LogisVert-eligible heat pumps (search tool): no R-410A LETO; file read October 14, 2026, re-checked unchanged October 26, 2026.
  6. Senville, “2023 Residential” brochure (© 2019) and “2019 Residential Air Conditioners Heat Pumps” catalogue, LETO page, read October 14, 2026.
  7. Senville, senville.ca LETO pages and installation manual CS372I-AF (20160620) served by their link, read October 14, 2026.
  8. airgreen.ca: our four R-410A LETO listings (model number, voltage), re-read October 26, 2026.

LogisVert amounts are indicative: Hydro-Québec confirms them when you apply. Prices on quotation.