7.2-i

APPENDIX 7.2. DECODING OF MANUFACTURER MODEL NUMBERS

LIST OF TABLES

Table 7.2.1 Amana Furnace Model Number Description ........................... 7.2-1

Table 7.2.2 Carrier Model Number Description ................................. 7.2-1

Table 7.2.3 ICP Model Number Description .................................... 7.2-2

Table 7.2.4 Goodman Model Number Description ............................... 7.2-2

Table 7.2.5 Lennox Model Number Description ................................. 7.2-2

Table 7.2.6 Armstrong Model Number Description ............................... 7.2-2

Table 7.2.7 Trane/American Standard Model Number Description ................... 7.2-3

Table 7.2.8 Rheem Non-Condensing Model Number Description .................... 7.2-3

Table 7.2.9 Rheem Condensing Model Number Description ........................ 7.2-3

Table 7.2.10 York Furnace Model Number Description ............................ 7.2-4

Table 7.2.11 Nordyne Model Number Description ................................ 7.2-4
7.2-1

APPENDIX 7.2. DECODING OF MANUFACTURER MODEL NUMBERS

The Department used manufacturer model numbers, among other furnace characteristics, to

determine nominal airflow capacity. Manufacturers often code furnace specifications into their model

numbers. This appendix illuminates the furnace specifications from manufacturer model numbers.

An Amana model number is as an example of how manufacturers code furnace characteristics. 

Table 7.2.1 shows the Amana model number “GUID045CA30.” The first row of the table shows the

model number broken into eight cells. The fifth, sixth, and seventh characters of the model number are

grouped together. The tenth and eleventh characters are grouped together. The second row gives an

explanation for each character or group of characters. Row three deciphers the character or group. 

Deciphering the model number shows that this Amana furnace model is an upflow gas furnace with

induced draft, a nominal output of 45K Btuh, that it is not NOx certified, and has an airflow capability of

three tons.

Table 7.2.1 Amana Furnace Model Number Description

G U I D 045 C A 30

Product

Type

Supply Type Furnace

Type

Model

Features

Nominal

Input

Design

Series

Additional

Features

Airflow

Capability

G: Gas

Furnace

U: Upflow I: Induced

Draft (80%)

D: Air

Command

80 SV

(Category I

Venting)

045: 45,000

Btuh

C: Third

Series

A:

Standard

Unit (not

NOx

certified)

30: 3 Tons

All manufacturers have similar coding schemes for their furnace model numbers. Tables 7.2.1-

7.2.11 show model numbers from the major manufacturers and an explanation of their conventions.

Table 7.2.2 Carrier Model Number Description

58WAV 045 150 08

Furnace Series Configuration/Type Input Capacity

 (btu/h)

Series Number Nominal Cooling Size (Airflow)

(400 CFM per 12,000 btu/h)

58WAV = High Efficiency Induced

Combustion Upflow Furnace

045 = 44,000

070 = 66,000

091 = 88,000

111 = 110,000

136 = 132,000

155 = 154,000

08 = 800 CFM

12 = 1200 CFM

14 = 1400 CFM

16 = 1600 CFM

20 = 2000 CFM
7.2-2

Table 7.2.3 ICP Model Number Description

N 9 MP 2 075 F 12 A #

Brand

Identifier

Model

Identifier

Installation

Configuration

Major Design

Feature

Heating

Input

(mbtu/h)

Cabinet

Width 

(inches)

Cooling

Airflow

Marketing

Digit

Engineerin

g Rev.

N = NonBrand Specific

(Generic)

T = Tempstar

8 = NonCondensing

9 = Condensing

MP = Multiposition

UP = Upflow

DN = Downflow

UH = Uplfow/

Horizontal

HZ = Horizontal

DH = Downflow/

Horizontal

1 = One pipe

2 = Two pipe

D = 1 or 1 pipe

L = Low Nox

N = Single Stage

P PVC Vent

T = Two Stage

V = Variable Speed

B =

15.5"

J = 22.8"

F =

19.1"

L =

24.5"

08 = 800

12 = 1200

14 = 1400

16 = 1600

20 = 2000

Denotes

minor

change

Denotes

minor

change

Table 7.2.4 Goodman Model Number Description

GMNT 040 3

Unit Type Input Capacity 

(Btu/h)

Nominal Cooling Capacity

(tons)

GMNT = Multi-position gas furnace 040 = 40,000 Btu/h 3 = 3 tons

Table 7.2.5 Lennox Model Number Description

G 40 UH 24 A 045 X

Unit Type Series Configuration Nominal AddOn Cooling

Capacity

Cabinet

Width

Heating Input

(btu/h)

CA emission

requirements

G = Gas

Furnace

40 = Merit Series 80%

50 = Elite 80%

60 = 2-stage 80%

UH = Upflow/Horizontal

DF = Downflow/Horizontal

24 = 2 Tons

36 = 3 Tons

48 = 4 Tons

60 = 5 Tons

A = 14-1/2

B = 17-1/2

C = 21

D = 24-1/2

045 = 44,000

070 = 66,000

090 = 88,000

110 = 110,000

135 = 132,000

155 = 154,000

X = meets

California

NOx standards

Table 7.2.6 Armstrong Model Number Description

G 1N 80 A H 100 D 20 B 1A

Product

Family

Furnace Type Nominal

AFUE

Series Configuration Heating

Input x

1000

(btu/h)

Motor

Type

Nominal

Maximum

CFM x

100

Cabinet

Width

Low 

NOx

Model

Series

1N = Single Stage

Heat, Non-Direct Vent

1D = Single Stage Heat,

Direct Vent

2D = Two Stage Heat,

Direct Vent

H = Horizontal

U = Upflow

T = Upflow/

Horizontal

R = Downflow/

Horixontal

D = Direct

Drive

A = 13-

1/2

B = 17

C = 20-

1/2

L =

Low

NOx

Model
7.2-3

Table 7.2.7 Trane/American Standard Model Number Description

T U Y 080 R 9 V3 V 0

Brand

Identifier

Furnace

Configuration

Type Heating

Input

(mbtu/h)

Major Design

Change

Power

Supply

and

Fuel

Airflow

Capacity for

Cooling

(400 CFM/Ton)

Minor

Design

Change or

Service

Digit

T = Trane

A = American

Standard

U = Upflow/

Horizontal

D = Downflow/

Horizontal

C = Condensing

D = Induced Draft

E = Electronic

Ignition

X = Direct Vent

Condensing

Y = Direct Vent

Condensing Variable

Speed

C = Single Stage

R = Two-Stage

All other =

Standard system

115

Volt/

Natural

Gas

3 = 3 Tons

V3 = 11⁄2-3 Tons,

Variable Speed

Motor (ICM)

V4 = 2 - 4 Tons,

Variable Speed

Motor (ICM)

V5 = 3 - 5 Tons,

Variable Speed

Motor (ICM)

H = Upflow/

Horizontal

V = Variable

Speed Motor

Table 7.2.8 Rheem Non-Condensing Model Number Description

R G P J 07 E A U E R

Brand

Identifier

Fuel Type NonCondensing

Furnace Type

Design Series Heating

Input

(kbtu/h)

Ignition

Type 

Variations Blower

Size

Cooling

Designation

(CFM)

Natural Gas

Fuel Code

R = Rheem

U = Ruud

W =

Weatherking

G = Natural

Gas

D = Upflow

L = Downflow

P = Upflow/

Horizontal

J = Acclaim

A = Acclaim

II

K = Acclaim

II Plus 2

L = Acclaim

II Plus 2 LXE

04 = 45

05 = 50

06 =

67.5

07 = 75

10 = 100

12 = 125

15 = 150

E =

Electric

Ignition

N =

Electric

Ignition -

NOx Model

A =

Standard

B= Wide

Cabinet

U = 11x6

M = 11x7

R = 11x10

S = 500-1200

E = 1100-

1300

G = 1450-

1750

J = 1900-

2075

R = US

A = Canada

Table 7.2.9 Rheem Condensing Model Number Description

R G T J 07 E M A E S

Brand

Identifier

Fuel Type Condensing

Furnace

Type

Design Series Heating

Input

(kbtu/h)

Ignition

Type 

Blower

Size

Variations Cooling

Designation

(CFM)

Natural Gas

Fuel Code

R = Rheem

U = Ruud

W =

Weatherking

G = Natural

Gas

T = 

Downflow/

Horizontal

R = Upflow

M = Upflow

Modulating 

J = Classic 90

A = Classic 90

Plus

D = Classic 90

Plus

Modulating

04 = 45

06 = 60

07 = 75

09 = 90

10 = 105

12 = 120

E =

Electric

Ignition

N =

Electric

Ignition - 

(Low NOx)

M = 11x7

R = 11x10

Z = 12x11 

Y = 12x7

A =

Standard

B= Wide

Cabinet

C =

Single/Mul

ti Zone

E = 1100-1300

G = 1500-1700

J = 1900-2100

K = 600-1200

M = 1200-

2000

S = US

B = Canada
7.2-4

Table 7.2.10 York Furnace Model Number Description

P4 HU A 12 N 032 01

Furnace

Configuration

Cabinet Size Width Design Series Output Capacity

(btu/h)

HU = Upflow

Horizontal

A = 14-1/2

B = 17-1/2

C = 21

D = 24-1/2

12 = 1200 CFM

16 = 1600 CFM

20 = 2000 CFM

032 =32,000

Table 7.2.11 Nordyne Model Number Description

G 6 R A 144 C 20 C

Furnace

Fuel Type

Design

Series

Furnace Type Furnace Configuration Heating Input

(btu/h)

Certification

Type

Nominal CFM Cabinet

Width

G, FG,

KG, L =

Gas

6 or 1 R = Residential

T = Residential, twostage

A = Upflow

C = Upflow, Condensing

K = Downflow

L = Downflow,

condensing

045 = 45,000

060 = 60,000

072 = 72,000

096 = 96,000

120 =

120,000

144 =

144,000

C = US/Canada

N = NOx US

08 = 800 CFM

12 = 1200 CFM

V = Variable

Speed

A = 14-

1/4

B = 19-

3/4

C = 22-

1/2

The Department used this information along with product literature and installation manuals to

develop a detailed database of furnace characteristics for models that are currently being sold. The

database is available on the DOE website at:

http://www.eere.energy.gov/buildings/appliance_standards/residential/furnaces_boilers.html.