COMFORTMAKER · SOFTSOUND · PERFORMANCE · CSH6The COMFORTMAKER space at AirGreenSoftSound Deluxe, SoftSound and Performance wall units, the CSH6 central unit and the FXM4X fan coil, sold and installed by AirGreen in Montreal, Laval, Longueuil, the South Shore and the North Shore.

Closed · opens at 8 a.m.

Comfortmaker · data checked October 13, 2026

Comfortmaker heat pumps in Montreal: three wall units, three cold limits

The DLCPRA SoftSound Deluxe heats down to -30 °C and keeps up to 75% of its capacity there. The DLCSRA SoftSound also goes down to -30 °C from 9,000 to 24,000 BTU/h. The DLCERA Performance stops at -17 °C. With ducts: the CSH6 central heat pump and its FXM4X fan coil.

Request a free quotation See the models

Lowest heating limit published by Comfortmaker (catalog, May 2018). DLCSRA 36,000 BTU/h: -25 °C.

-30 °CDLCPRA: up to 75% of capacity

24.7 dB(A)DLCSRA 9,000 BTU/h, indoor, low speed

10 yearsparts, registered wall units (2018 certificate)

4published COMFORTMAKER projects

AirGreen × COMFORTMAKERSold and installed by AirGreenDLCPRA: down to -30 °CUp to 75% of capacity at -30 °CSoftSound · Performance · CSH64 published COMFORTMAKER projectsMontreal · Laval · Longueuil · South Shore · North Shore

AirGreen × COMFORTMAKER

Comfortmaker equipment, a local team.

Comfortmaker designs the equipment. AirGreen picks the model with you and installs it. Each does what it does best.

What COMFORTMAKER brings

Three levels of wall unitsDLCPRA down to -30 °C, DLCSRA down to -30 °C from 9,000 to 24,000 BTU/h, DLCERA down to -17 °C, according to the manufacturer.
Up to 75% at -30 °CThe DLCPRA SoftSound Deluxe keeps up to 75% of its heating capacity at -30 °C.
24.7 dB(A) indoorsThe DLCSRA 9,000 BTU/h head at low speed, according to the catalog.
The central routeCSH6 heat pump and FXM4X fan coil for a home with ducts.

What AirGreen brings

Sold and installed by AirGreenIn Montreal, Laval, Longueuil, the South Shore and the North Shore.
Free quotationThe model and the size are chosen with you.
4 published COMFORTMAKER projectsChomedey, Le Sud-Ouest, Montreal and Dollard-des-Ormeaux.
RBQ 5645-9605-01Subclasses 15.8, 15.10 and 16.

The result: the right Comfortmaker, chosen with you and installed by AirGreen.

Find my Comfortmaker Request a free quotation

The Comfortmaker lineup at AirGreen

01Five families, two ways to heat

Three ductless wall series, one central heat pump and the fan coil that goes with it. Each card opens the collection that holds its models.

DLCPRA

SoftSound Deluxe

Wall unit, 9,000 to 24,000 BTU/h. Heats down to -30 °C.

4 models

DLCSRA

SoftSound

Wall unit, 9,000 to 36,000 BTU/h. -30 °C up to 24,000; -25 °C at 36,000.

5 models

DLCERA

Performance

Wall unit, 9,000 to 18,000 BTU/h. Heats down to -17 °C.

3 models

CSH6

Central heat pump

2 to 5 tons, SEER 16, for a home with ducts.

6 models

FXM4X

Fan coil

The CSH6’s indoor unit, with an electric heat kit.

6 models

Also:All Comfortmaker wall units Comfortmaker central units Our -30 °C units

Tool 1 · the cold ladder

02How far down does each series heat?

Slide the temperature. Each line shows whether the series still operates according to the manufacturer, and what Comfortmaker publishes about its capacity at that level. No figure is extrapolated.

Outdoor temperature

-25 °C

Pick a temperature

-30 °C-15 °C0 °C+10 °C

DLCPRA

SoftSound Deluxe · 9,000 to 24,000 BTU/h

100% of heating capacity at -17 °C (0 °F) · Up to 75% of heating capacity at -30 °C

Operates

DLCSRA

SoftSound · 9,000 to 24,000 BTU/h

100% of capacity at -15 °C (5 °F) at 12,000 and 18,000 BTU/h · Up to 69% of rated capacity at -30 °C

Operates

DLCSRA 36k

SoftSound · 36,000 BTU/h

Manufacturer heating range: down to -25 °C.

Operates

DLCERA

Performance · 9,000 to 18,000 BTU/h

Below the manufacturer’s limit (-17 °C): another heat source takes over.

Out of range

Tool 2 · the comparator

03Deluxe, SoftSound or Performance: the same size, side by side

Pick a measure and a size. Values are the manufacturer’s (SEER and HSPF of the period, not SEER2 or HSPF2).

Measure

Size

DLCPRA

SoftSound Deluxe

9,000 BTU/h

40.0

SEER

Best value

DLCSRA

SoftSound

9,000 BTU/h

24.7

SEER

DLCERA

Performance

9,000 BTU/h

17.6

SEER

Sources: Comfortmaker catalog of May 2018 (DLCPRA 9,000 and 12,000, DLCSRA, DLCERA); specification sheet 328-22-0482-00 (©2020) for DLCPRA 18,000 and 24,000 BTU/h. Max heat at -15 °C = maximum capacity published at 5 °F. DLCPRA 18,000 and 24,000 indoor sound: not published in these documents.

Tool 3 · the right system

04Three questions, one lead

A first direction, not a sizing: the size is decided at the quotation.

1. Does the home have air ducts?

Our lead

Answer the questions

The lead appears here after the first answer.

The central route

05CSH6 and FXM4X fan coil: for a home with ducts

The CSH6 is the outdoor heat pump; the FXM4X is the indoor unit that blows air through the ducts. Backup electric heat comes from a kit installed in the FXM4X.

CSH6 outdoors: single-stage heat pump, SEER 16, R-410A.
Refrigerant lines between the two units.
FXM4X indoors: fan coil, with a 5 to 30 kW EHK electric kit.
Ducts warm or cool air goes through the whole house.

The FXM4X is sold on our site as an “electric furnace”: the manufacturer describes it as a multi-position fan coil with an ECM motor and a factory TXV.

At AirGreen: CSH6 and FXM4X fan coils from 2 to 5 tons. The manufacturer does not publish a minimum heating temperature for the CSH6.

Size	Model	HSPF	Outdoor
2 tons	CSH624	8.5	71 dBA
2.5 tons	CSH630	9.0	70 dBA
3 tons	CSH636	8.5	71 dBA
3.5 tons	CSH642	8.5	68 dBA
4 tons	CSH648	9.0	71 dBA
5 tons	CSH660	8.5	69 dBA

SEER 16 and EER 13 for every size, R-410A. Sources: Comfortmaker Product Specifications CSH6, 428 41 6400 02 (April 25, 2019); Product Specifications FXM4X, 496 41 5402 04 (July 2, 2019).

CSH6 collection FXM4X collection

Tool 4 · the manufacturer’s warranty

06What Comfortmaker covers, according to its documents

Pick the type of unit and the registration. Only the manufacturer’s written terms are shown.

Unit

Registered on time?

10 years

Parts, original owner

Registration within 90 days of installation.

5 years

Parts, later owners

According to the certificate’s table.

Manufacturer labour

The certificate excludes labour (diagnosis, repair, installation).

In Québec: the certificate states that the registration condition does not apply in California, Québec and other jurisdictions that prohibit tying warranty benefits to registration.

Source: Limited Warranty Certificate, Ductless Split Units (DLF, DLC), 401 06 4316 04, January 2018 (Canada included). Accessed Oct. 13, 2026.

Tool 5 · LogisVert, system by system

07LogisVert: what Hydro-Québec’s list says

Hydro-Québec publishes the list of eligible heat pumps. We checked every AHRI number on our Comfortmaker sheets on October 13, 2026.

ENERGY STAR required

Since November 26, 2025, the heat pump must be ENERGY STAR certified (guide v1.10).

$50 or $120 per 1,000 BTU/h

Based on capacity at -8 °C: $120 if the unit is ENERGY STAR “cold climate”. Outdoor unit of at least 12,000 BTU/h.

Claim within 9 months

The claim is filed no later than 9 months after installation, never more than 100% of the pre-tax cost.

Search a model or an AHRI number

System (our sheets)AHRIENERGY STARLogisVert

DLCPRA 9,000201835554Not certifiedOn quotation

DLCPRA 12,000201835555Not certifiedOn quotation

DLCPRA 18,000202463644Not certifiedOn quotation

DLCPRA 24,000202463645Not certifiedOn quotation

DLCSRA 9,000201835563Not certifiedOn quotation

DLCSRA 12,000201835564Not certifiedOn quotation

6 system(s) shown out of 17 AHRI numbers. None appears on Hydro-Québec’s list of October 13, 2026.

Sources: list behind Hydro-Québec’s “Efficient heat pump search” tool (file of Oct. 13, 2026, owner, existing home); ENERGY STAR dataset w7cv-9xjt (updated Oct. 8, 2026); LogisVert guide v1.10 of Sept. 15, 2026.

Our installations

084 published COMFORTMAKER projects

The articles in our “Our projects” blog about a Comfortmaker unit.

All our projects

Installation

Installation of a Comfortmaker wall-mounted heat pump in Chomedey, Laval

June 4, 2026 · Chomedey, LavalRead the article Installation

Installation of a Comfortmaker wall-mounted heat pump in Le Sud-Ouest (Montreal)

January 25, 2026 · Le Sud-Ouest, MontrealRead the article Repair

Repair of a Comfortmaker wall-mounted heat pump in Montreal

April 4, 2025 · MontrealRead the article Installation

Installation of a Comfortmaker DLCPRA wall-mounted heat pump in Dollard-des-Ormeaux

August 11, 2023 · Dollard-des-OrmeauxRead the article

Frequently asked questions

09Comfortmaker: your questions

Search the questions

Which Comfortmaker wall heat pump heats down to -30 °C?

The DLCPRA SoftSound Deluxe (9,000 to 24,000 BTU/h), which keeps up to 75% of its capacity at -30 °C, and the DLCSRA SoftSound from 9,000 to 24,000 BTU/h (up to 69%). The DLCSRA 36,000 BTU/h goes down to -25 °C and the DLCERA Performance to -17 °C.

Is Wi-Fi included?

No. The manufacturer sells it as an optional kit: KSAIF0601AAA for the DLCPRA, KSAIF0501AAA for the DLCSRA, KSAIF0101AAA or KSAIF0201AAA (18,000 BTU/h) for the DLCERA.

Which series is the quietest?

Indoors, at low speed: DLCSRA 9,000 BTU/h at 24.7 dB(A), DLCPRA 9,000 at 29 dB(A), DLCERA 9,000 at 31 dB(A), according to the manufacturer’s catalog.

Are Comfortmaker heat pumps eligible for LogisVert?

None of the 17 AHRI numbers on our Comfortmaker sheets appears on Hydro-Québec’s list of October 13, 2026, so the amount is “on quotation”. LogisVert requires an ENERGY STAR certified unit.

Are these models ENERGY STAR certified?

None of our 17 Comfortmaker AHRI numbers appears in the ENERGY STAR dataset consulted on October 13, 2026 (updated October 8, 2026).

What is the manufacturer’s warranty on a wall unit?

The warranty certificate of January 2018 provides 10 years on parts to the original owner if the unit is registered within 90 days, otherwise 5 years. It states that this registration condition does not apply in Québec. Labour is excluded.

And on the CSH6 central unit?

According to the 2019 sheet: 5 years on parts (compressor and coil included), 5 more years with timely registration, and 5 years of No Hassle Replacement. The FXM4X has the same terms.

What is the Comfortmaker “electric furnace”?

It is the FXM4X fan coil, the CSH6’s indoor unit. Electric heat comes from a 5 to 30 kW EHK kit installed in it.

Which refrigerant do they use?

R-410A, for the three wall series and for the CSH6, according to the manufacturer’s documents.

What does it cost?

Price on quotation. The quotation is free.

Have you installed Comfortmaker before?

Our “Our projects” blog has 4 published Comfortmaker articles: Chomedey (Laval), Le Sud-Ouest, Montreal and Dollard-des-Ormeaux.

Next step

A Comfortmaker quotation for your home

Tell us what you want to heat and cool. The quotation sets out the model and the size.

Request a free quotation 514 316-2973

Phone514 316-2973

RBQ licence5645-9605-01

Showroom1370 Joliot-Curie St., Unit 712, Boucherville

Office hoursMon-Thu 8 a.m.-6 p.m. · Fri 8 a.m.-4 p.m.

Dated sources

10Sources

Comfortmaker, “Residential and Light Commercial Ductless Systems Catalog”, May 2018: DLCPRA, DLCSRA, DLCERA series (heating ranges, SEER, HSPF, sound, Wi-Fi kits). Accessed Oct. 13, 2026.
Comfortmaker, Product Specifications CSH6, 428 41 6400 02, April 25, 2019.
Comfortmaker, Product Specifications FXM4X, 496 41 5402 04, July 2, 2019.
Limited Warranty Certificate, Ductless Split Units (DLF, DLC), 401 06 4316 04, January 2018.
ENERGY STAR, Certified Air-Source Heat Pumps, dataset w7cv-9xjt, updated Oct. 8, 2026, accessed Oct. 13, 2026.
Hydro-Québec, “Efficient heat pump search” tool, list of Oct. 13, 2026 (owner, existing home).
Hydro-Québec, LogisVert program, residential participation guide, version 1.10, September 15, 2026.
AirGreen, “Our projects” blog: 4 published Comfortmaker articles, counted Oct. 13, 2026.

Price on quotationFree quotation. The Comfortmaker models are listed below.See the models

AirGreen × COMFORTMAKER