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COMFORTMAKER // CSH6

What does the CSH6 rating plate say, and where does the unit go?

The values on this page are the ones COMFORTMAKER publishes.

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COMFORTMAKER // CSH6

COMFORTMAKER CSH6 outdoor unit: what its rating plate tells you

Its name decoded, the space it takes, what it needs from the panel and the refrigerant lines.

The CSH6 is the outdoor unit of COMFORTMAKER’s central heat pumps: six sizes from 2 to 5 tons, a scroll compressor and a factory R-410A charge.

Page updated November 5, 2026

This page answers

What does the CSH6 rating plate say, and where does the unit go?

AirGreen

Sold and installed by AirGreen.

We install in Montreal, Laval, Longueuil, the South Shore and the North Shore.

01 // The tool

Read the plate

Pick the size and the refrigerant line length. The tool decodes each position of the model number from the sheet’s nomenclature, then shows that size’s row.

Size

Refrigerant line length

Sheet nomenclature, p. 2: after the first eight positions come the sales code (A), the engineering revision (1) and two extra digits (01). The tool does not read the serial number: no brand document we cite gives its key. Cooling losses are those the sheet prints for the smallest permitted vapour line of each size. Charge converted to kilograms: AirGreen calculation.

CSH636GKA101

model number decoded

A101
Model number
CSH636GKA101as printed on the sheet
C
COMFORTMAKERmain line
S
Single-stage, communicating
H
Heat pumpA would be an air conditioner
6
16 SEER family
36
36,000 BTU/h nominal (3 tons)
G
Coil guard grilleA would be the standard grille
K
208/230 V, single phase, 60 Hz
Footprint D × W × H
889 × 889 × 853.5 mm (35 × 35 × 33-5/8 in)as printed, sheet p. 1
Operating weight
107.5 kg (237 lb)
MCA / max fuse or breaker
21.6 A / 35 Aoperating voltage 197 to 253 V
Factory R-410A charge
11.2 lb5.08 kg (AirGreen calculation)
Refrigerant lines: liquid / vapour
3/8 in / 3/4 inpermitted vapour sizes: 5/8, 3/4 and 7/8 in
Standard sound rating
71 dB(A)tested to AHRI Standard 270-08, sheet p. 5
Outdoor fan
3,223 CFM · 1/12 hp motor
Cooling loss at 7.6 m
0% (rating length)the sheet’s rating length, with the vapour line used for the ratings; with the smallest permitted vapour line (5/8 in), the sheet prints 1%

At 7.6 m of refrigerant line, the CSH636 sits at the length where the sheet measures its ratings.

CSH6 sheet (428 41 6400 02, April 25, 2019), pp. 1, 2, 4 and 5.

The COMFORTMAKER shop

The COMFORTMAKER products on this page, right below

Price on quotation, after the on-site assessment.

COMFORTMAKER

02 // Did you know

Three details from COMFORTMAKER’s documents

Only one tall cabinet

The 5-ton (CSH660) stands 1,199 mm tall; the other five sizes we offer, 853.5 mm.

CSH6 Product Specifications, 428 41 6400 02 (April 25, 2019), p. 1

Longer lines cost cooling capacity

The sheet publishes the cooling loss by refrigerant line length: up to 5% at 30.5 m on the 3-ton, with the smallest permitted vapour line.

CSH6 Product Specifications, 428 41 6400 02 (April 25, 2019), p. 5

Ratings measured at 7.6 m

The sheet’s ratings are measured with 7.6 m of refrigerant line.

CSH6 Product Specifications, 428 41 6400 02 (April 25, 2019), p. 4

03 // The comparison

Compared with the SoftSound® Deluxe 24,000 outdoor unit

At 24,000 BTU/h, the outdoor units of the central system and of the SoftSound® Deluxe wall unit differ in both shape and weight. Sound is not compared: the two documents do not measure it the same way.

ValueCSH624DLCPRAH24 (SoftSound® Deluxe)
Dimensions W × H × D889 × 853.5 × 889 mm946 × 810 × 410 mm
Weight (basis)88.0 kg operating65.8 kg net
MCA15.5 A20 A
Max fuse25 A30 A
Refrigerant lines, liquid / vapour3/8 in / 5/8 in3/8 in / 5/8 in

Same refrigerant line sizes; the CSH624 needs a lower MCA. The weights are not compared: the CSH6 sheet gives an operating weight, the brochure a net weight. DLCPRAH24 values come from the January 2023 COMFORTMAKER brochure.

CSH6 Product Specifications, 428 41 6400 02 (April 25, 2019), pp. 1 and 4; COMFORTMAKER brochure, January 2023, pp. 13 to 18

04 // Published figures

The six CSH6 sizes

ValueCSH624CSH630CSH636CSH642CSH648CSH660
Nominal size2 ton2.5 ton3 ton3.5 ton4 ton5 ton
Nominal capacity24,000 BTU/h30,000 BTU/h36,000 BTU/h42,000 BTU/h48,000 BTU/h60,000 BTU/h
Footprint D × W × H889 × 889 × 853.5 mm889 × 889 × 853.5 mm889 × 889 × 853.5 mm889 × 889 × 853.5 mm889 × 889 × 853.5 mm889 × 889 × 1,199 mm
Operating weight88.0 kg103.9 kg107.5 kg115.7 kg117.9 kg143.8 kg
MCA / max fuse15.5 / 25 A19.9 / 30 A21.6 / 35 A27.8 / 40 A31.8 / 45 A33.9 / 50 A
Factory R-410A charge7.6 lb9.75 lb11.2 lb9.92 lb9.87 lb13.0 lb
Liquid / vapour3/8 / 5/8 in3/8 / 3/4 in3/8 / 3/4 in3/8 / 7/8 in3/8 / 7/8 in3/8 / 1-1/8 in
Standard sound rating71 dB(A)70 dB(A)71 dB(A)68 dB(A)71 dB(A)69 dB(A)
Outdoor fan3,223 CFM, 1/12 hp3,223 CFM, 1/12 hp3,223 CFM, 1/12 hp3,770 CFM, 1/3 hp4,046 CFM, 1/4 hp4,400 CFM, 1/3 hp
Cooling loss at 15.2 / 24.4 / 30.5 m1 / 1 / 2%2 / 3 / 3%2 / 4 / 5%1 / 2 / 2%1 / 2 / 3%2 / 4 / 5%

Values as printed; the charge is given in pounds. On the CSH660, the vapour line used for the ratings is 1-1/8 in, for a 7/8 in connection. Cooling loss is for the smallest permitted vapour line of each size. The sound rating follows AHRI Standard 270-08. MCA: minimum circuit ampacity; max fuse: the largest fuse or breaker allowed (printed as MOCP or max fuse depending on the document).

CSH6 Product Specifications, 428 41 6400 02 (April 25, 2019), pp. 1, 4 and 5

05 // Good to know

Good to know before the on-site assessment

What’s inside, per the spec sheet

Every size has a scroll compressor on isolation grommets, with a compressor sound blanket as standard. The suction line accumulator is factory installed; the bi-flow filter-drier comes with the unit for field installation. Outside, the inlet grille is coated, with 10 mm spacing, and the galvanized steel cabinet gets a baked-on powder coat. Two screws open the control panel.

Cooling on cool days

Below 12.8 °C outdoors, cooling needs the sheet’s low-ambient package: compressor start assist, crankcase heater, evaporator freeze thermostat, isolation relay and low ambient switch, with support feet recommended. Long refrigerant lines also call for the start assist and the crankcase heater, plus a liquid line solenoid under the sheet’s “long line” rules.

06 // Warranty

Warranty published by COMFORTMAKER

  • 5-year No Hassle Replacement limited warranty.
  • 5-year parts limited warranty, including compressor and coil.
  • With timely registration, an additional 5-year parts limited warranty, including compressor and coil.
  • Applies to original purchaser/homeowner; some limitations may apply.
  • COMFORTMAKER does not cover labour.

The sheet refers to the warranty certificate for complete details.

CSH6 Product Specifications, 428 41 6400 02 (April 25, 2019), p. 1

AirGreen // COMFORTMAKER

What COMFORTMAKER publishes, what AirGreen does

COMFORTMAKER

What COMFORTMAKER publishes

  • The units and their spec sheetsThe values shown here are the ones the brand publishes; our calculations carry the label “AirGreen calculation”.
  • The parts warrantyAs printed in its documents, with its conditions.
AirGreen

What AirGreen does

  • Sold and installed by AirGreen.Montreal, Laval, Longueuil, the South Shore and the North Shore.
  • The on-site assessmentThe series and the size are chosen in your home.
  • One clear quotationThe unit, the install and the accessories you choose, on one document.

07 // Questions

The questions we get

How do I read a CSH6 model number?

Take CSH636GKA101, the form printed on the sheet: C for COMFORTMAKER, S for single-stage communicating, H for heat pump, 6 for the 16 SEER family, 36 for 36,000 BTU/h nominal (3 tons), G for the coil guard grille and K for 208/230 V single phase, 60 Hz. Then come the sales code (A), the engineering revision (1) and two extra digits (01).

Does the serial number tell the unit’s age?

Not here. No brand document we cite publishes the serial number key, so we do not read a manufacturing date into it.

What does the sheet publish about the CSH6 in cold weather?

The brand publishes no minimum operating temperature. Its expanded tables go down to −19.4 °C (−3 °F; row read, to be confirmed on the sheet). Defrost is controlled by time and temperature. The heat of the whole system with its kit is worked out on the central heat pumps page.

What breaker does the CSH6 need?

The sheet prints the minimum circuit ampacity (MCA) and the maximum fuse or breaker for each size: from 15.5 A and 25 A on the CSH624 up to 33.9 A and 50 A on the CSH660. The unit runs on 208/230 V single phase, 60 Hz, between 197 V and 253 V. The fan coil and its heater kit have their own supply.

How loud is the CSH6?

The sheet publishes a standard sound rating of 68 to 71 dB(A) depending on size, tested to AHRI Standard 270-08; the lowest is the CSH642, at 68 dB(A). It is a standard rating: we do not compare it with any other value.

What refrigerant is in the CSH6?

R-410A, factory charged: from 7.6 lb on the CSH624 to 13.0 lb on the CSH660, according to the sheet. The liquid line is 3/8 in on every size.

What warranty does COMFORTMAKER give on the CSH6?

The sheet publishes a 5-year No Hassle Replacement limited warranty, a 5-year parts limited warranty including compressor and coil, and an additional 5 years on parts with timely registration. It applies to the original purchaser/homeowner, and some limitations may apply. COMFORTMAKER does not cover labour.

Sources checked November 5, 2026

  • CSH6 Product Specifications, 428 41 6400 02, April 25, 2019, pp. 1, 2, 4, 5, 7 to 13 and 16: shareddocs.com
  • COMFORTMAKER brochure, January 2023, pp. 13 to 18 (SoftSound® Deluxe DLCPRAH24).
  • Canadian Climate Normals 1981–2010, Environment and Climate Change Canada, station MONTREAL/PIERRE ELLIOTT TRUDEAU INTL A (7025250), read November 5, 2026: climate.weather.gc.ca

AirGreen calculations (kW conversions, sums, percentage shares) are made on the published values and labelled as such.

AirGreen // Air conditioning and heating

The outdoor unit is placed on site

We look at the spot outside, the refrigerant line route and the panel, then propose the size.

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Page updated November 5, 2026