Furnace Specifications

GMS8[040-100]BB GMS81205D*BA GMS81405DNCC

M O DEL

Btuh Input (US) High Fire

Output (US) High Fire

A.F.U.E.

Rated External Static (" w.c.)

Temperature Rise (°F)

High Stage Pressure Switch

Trip Point (" w.c .)

Blower W heel (D" x W ")

Blower Horsepower

Blower Speeds

Max CFM @ 0.5 E.S.P.

Power Supply

Minimum Circuit Am pacity (MCA)(1)

Maximum Overcurrent Device(2)

Transformer (VA)

Heat Anticipator (Amps)

Primary Limit Setting (°F)

Auxiliary Limit Setting (°F)

Rollout Limit Setting (°F)

Gas Supply Pressure (Natural/Propane) (" w.c.)

Manifold Pressure (Natural/Propane) High Stage (" w.c.)

Orifice Size (Natural/Propane)

Number of Burners

Vent Connector Diameter (inches)(3 )

Shipping W eight (lbs.)

GMS80403A*BB	GMS80603A*BB	GMS80604B*BB	GMS80804B*BB	GMS80805C*BB	GMS81005C*BB	GMS81205D*BA	GMS81405DNCC

40,000	60,000	60,000	80,000	80,000	100,000	120,000	140,000
32,000	48,000	48,000	64,000	64,000	80,000	96,000	112,000
80%	80%	80%	80%	80%	80%	80%	80%
.20 - .50	.20 - .50	.20 - .50	.20 - .50	.20 - .50	.20 - .50	.20 - .50	.20 - .50
25 - 55	25 -55	20 - 50	35 - 65	35 - 65	35 - 65	40 - 70	40 - 70
-0.70	-0.75	-0.75	-0.70	-0.75	-0.70	-0.80	-0.80
10 X 6	10 x 6	10 x 8	10X8	10x10	10X10	11x10	11x10
1/3	1/3	1/2	1/2	1/2	1/2	3/4	3/4
4	4	4	4	4	4	4	4
1298	1157	1883	1725	1960	1974	2131	2131
115-60-1	115-60-1	115-60-1	115-60-1	115-60-1	115-60-1	115-60-1	115-60-1
8.5	8.5	12.9	12.9	12.9	12.9	15.2	14.7
15	15	15	15	15	15	15	15
40	40	40	40	40	40	40	40
0.7	0.7	0.7	0.7	0.7	0.7	0.7	0.7
210°	150°	150°	150°	160°	150°	160°	160°
120°	120°	120°	120°	120°	120°	120°	120°
300°	300°	300°	300°	300°	300°	300°	300°
7 / 11	7 / 11	7 / 11	7 / 11	7 / 11	7 / 11	7 / 11	7 / 11
3.5 / 10	3.5 / 10	3.5 / 10	3.5 / 10	3.5 / 10	3.5 / 10	3.5 / 10	3.5 / 10
#45 / #55	#45 / #55	#45 / #55	#45 / #55	#45 / #55	#45 / #55	#45 / #55	#43 / #55
2	3	3	4	4	5	6	6
4	4	4	4	4	4	4	4
84	88	98	106	114	118	130	130

(1)Wire size should be determined in accordance with National Electrical Codes. Extensive wire runs will require larger wire sizes.

(2)Maximum Overcurrent Protection Device: May use Time Delay Fuse or HACR type Circuit Breaker of the same size as noted.

(3)See Installation Instructions for appropriate vent diameter, length and number of elbows.

1.These furnaces are manufactured for natural gas operation. Optional Kits are available for conversion to propane gas operation.

2.For elevations above 2000 ft. the rating should be reduced by 4% for each 1000 ft. above sea level. The furnace must not be derated, orifice changes should only be made if necessary for altitude.

3.The total heat loss from the structure as expressed in TOTAL BTU/HR must be calculated by the manufactures method in accordance with the "A.S.H.R.A.E. GUIDE" or "MANUAL J-LOAD CALCULATIONS" published by the AIR CONDITIONING CONTRACTORS OF AMERICA. The total heat loss calculated should be equal to or less than the heating capacity. Output based on D.O.E. test procedures, steady state efficiency times output.

4.Minimum Circuit Ampacity calculated as: (1.25 x Circulator Blower Amps) + I.D. Blower Amps.

Unit specifications are subject to change without notice. ALWAYS refer to the unit's serial plate for the most up-to-date general and electrical information.

RT6621031r2, GMS8 33-3/8 GAS FURNACE UNITS specifications

Goodman Manufacturing is renowned for delivering reliable and efficient HVAC systems, and the RT6621031R2 GMS8 Gas Furnace is no exception. This gas furnace is specifically engineered for residential heating needs, ensuring comfort in various climates. Its design is both effective and energy-efficient, making it a popular choice among homeowners.

One of the main features of the GMS8 furnace is its two-stage heating capability. This technology allows the unit to operate at two different levels of heating output, which helps maintain a more consistent temperature within the home. During milder temperatures, the furnace can operate at a lower stage, saving energy while still delivering adequate warmth. On colder days, it seamlessly transitions to the higher stage, ensuring maximum comfort.

The GMS8 boasts a multi-speed blower motor, which enhances its overall efficiency and performance. This allows for variable airflow adjustments, improving air distribution throughout the home. The result is not only increased comfort but also reduced noise levels, making the operation of this furnace pleasantly quiet.

An important characteristic of the GMS8 is its durable construction, featuring a heavy-gauge steel cabinet designed to withstand harsh operating conditions. The integrated insulated blower compartment further ensures that the unit operates efficiently while minimizing heat loss. Its compact design allows for easier installation in various home configurations.

In terms of energy efficiency, the GMS8 is equipped with a 80% Annual Fuel Utilization Efficiency (AFUE) rating. This means that 80% of the gas consumed translates into usable heat, making it a cost-effective option for heating your home. Additionally, it is compatible with a range of programmable thermostats, allowing homeowners to optimize their heating schedules and further enhance energy savings.

The GMS8 furnace is also designed with safety in mind. It includes features such as an integrated self-diagnostic control board and a flame rollout switch for enhanced operational safety. The extended warranty options available also provide peace of mind, ensuring that homeowners feel secure in their investment.

In summary, the Goodman RT6621031R2 GMS8 Gas Furnace is an efficient, reliable, and durable heating solution for homes. With its two-stage heating capabilities, multi-speed blower motor, and a robust design, it stands out as a trusted choice for families seeking comfort and energy savings during the chilly months.

Goodman Mfg GMS8 33-3/8 GAS FURNACE UNITS, RT6621031r2 service manual Furnace Specifications, Del

Models: RT6621031r2 GMS8 33-3/8 GAS FURNACE UNITS