Lennox G51 Manuel utilisateur

G51

Single-stage, high-efficiency furnace

Home Comfort Systems

LENNOX’ ELITE®SERIES

G51 High-Efficiency Gas Furnace ◆92.1% AFUE

Maximum comfort is yours with the Elite®Series G51 gas furnace. The G51

surrounds you in warmth, without undue noise. Its sound-absorbing,

insulated cabinet delivers smooth, quiet operation.

ENGINEERED FOR COMFORT AND EFFICIENCY

The G51 has a low-speed, continuous fan setting that provides maximum

comfort with remarkable efficiency, which means you’ll stay warm for less.

Elite®Series G51 Furnace

High efficiency can save you

hundreds of dollars each year

SureLight®Control delivers

starting reliability

Low-speed, continuous fan

setting provides a consistent

flow of air

ENERGY STAR®qualified

EFFICIENCY RATING

92.1% AFUE (Annual Fuel

Utilization Efficiency).

WARRANTY*

Limited lifetime warranty

on the heat exchanger.

5-year limited warranty

on all remaining covered

components.

Innovation never felt so good.

™

*Applies to residential applications only.

See actual warranty certificate for details.

EfficientCan give you

significant energy savings year

after year

The G51 gas furnace not only

keeps you warm—it also reduces

your energy costs. With an efficiency

rating of 92.1% AFUE (Annual

Fuel Utilization Efficiency), the

G51 offers more comfort for

your energy dollars.

ReliableDesigned and tested to ensure optimal performance

Every component of the G51 is rigorously tested in our dedicated research lab.

As a result, you can count on your new furnace to deliver the highest possible

level of reliability and performance.

This chart depicts potential energy savings you can

expect from the G51 gas furnace versus older furnaces

with lower efficiency ratings. Criteria used in this

example are 2,000 full-load heating hours, with a

60,000-Btuh heating design load and $1.281 ccf for

gas. Your actual savings will vary depending on the

weather, local fuel rates and your lifestyle.

Source: U.S. Department of Energy national average

energy rates.

AFUE

92.1

vs. 55%

92.1

vs. 65%

$4000

$3000

$2500

$2000

$1500

$1000

$500

$3378

3-YEAR HEATING SAVINGS

$2088

92.1% efficient G51 gas furnace vs.

55% and 65% equivalent AFUE units

Elite®Series G51 Specifications

G51 24B-045 36B-045 36B-070 36C-090 48C-090 60C-090

AFUE 92.1% 92.1% 92.1% 92.1% 92.1% 92.1%

Dimensions HxWxD (in.) 40 x 17-1/2 x 28-1/2 40 x 17-1/2 x 28-1/2 40 x 17-1/2 x 28-1/2 40 x 17-1/2 x 28-1/2 40 x 21 x 28-1/2 40 x 21 x 28-1/2

HxWxD (mm) 1016 x 446 x 724 1016 x 446 x 724 1016 x 446 x 724 1016 x 446 x 724 1016 x 533 x 724 1016 x 533 x 724

G51 48C-110 60C-110 60D-135

AFUE 92.1% 92.1% 92.1%

Dimensions HxWxD (in.) 40 x 21 x 28-1/2 40 x 21 x 28-1/2 40 x 24-1/2 x 28-1/2

HxWxD (mm) 1016 x 533 x 724 1016 x 533 x 724 1016 x 622 x 724

Note: Due to Lennox’ ongoing commitment to quality, all specifications, ratings and dimensions are subject to change without notice.

Lennox is proud of

the fact that these

products have

earned the Good

Housekeeping Seal.

THIS MODEL

92.1%

INNOVATIVE FEATURES FOR ENHANCED COMFORT AND EFFICIENCY

G51

92.1% AFUE

Insulated Blower Compartment –

Reduces sound for quieter operation.

Duralok Plus®Heat Exchanger –

Made of high-quality, patented ArmorTuf™

aluminized steel. Life-tested to 2-1/2 times agency

requirements (ANSI standard Z21.47) for long

life and durability.

SureLight®Igniter –

Made of silicon nitride for reliable,

long-life performance

Robust Stainless Steel

Secondary Heat Exchanger –

Time-tested design allows the furnace to achieve

high efficiency levels by capturing additional heat.

SureLight Control Board –

Controls furnace operation to

ensure reliable, efficient performance.

Durable Steel Cabinet –

Built to last and coated with high-quality, textured-

paint finish.

Many Lennox®home

comfort systems meet

ENERGY STAR®requirements

when used with appropriate

components. Ask your

dealer for details.

PC55478(48M85) G51 09/08

Visit us at www.lennox.com, or contact us at 1-800-9-LENNOX.

1Air conditioner or heat pump

2Thermostat

3Furnace or air handler

4Filtration device

5Germicidal light

6Indoor coil

7Humidifier

8HEPA bypass filtration system

9Energy recovery ventilator

 Supply duct

 Return duct

 Dehumidifier system

 Residential generator

CUSTOMIZE YOUR COMFORT

Lennox®heating, cooling and indoor air quality products are designed to

provide efficient, economical comfort—not only as individual units, but also

together as an integrated system. This combined network of products delivers

on every comfort count, from consistent temperatures and balanced humidity to improved indoor air quality. Lennox

also offers a line of residential generators, which provide safe, reliable standby power in the event of outages.

DEALERS YOU CAN COUNT ON

Choosing the right dealer for your home’s heating, cooling and air quality needs is every bit as important as choosing the

right brand. We think you’ll agree our independent dealers are a big reason you can count on quality customer service

whenever you call. Your Lennox dealer’s dedication to quality shows in his knowledge, training and expertise in designing

the right system for your home, installing it properly and keeping it running perfectly for many years to come.

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