LF24 Lennox Garage Heaters

User Manual: LF24

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LF24 and TUA ◆ Up to 75,000 Btuh and Up to 81% Thermal Efficiency

LF24 and TUA
Garage Heaters
Easy, innovative solutions for making your
garage more usable and comfortable

Innovation never felt so good.™

Garage Heaters
30,000 to 75,000 Btuh for
almost any size garage or
utility area
Low-profile cabinet design
with a choice of configurations
Separated combustion heater
available* for hard-to-heat
applications where excessive
dust, dirt, humidity or
­negative pressure is a concern
Shipped completely
assembled with controls
factory-installed and wired
Natural or propane gas**
Warranty***
10-year limited warranty
on heat exchanger.
5-year limited warranty
on remaining covered
components.
*Contact your Lennox dealer for
information on the T-Class™ (TUA)
­separated combustion heaters.
**Optional conversion kit available
for propane applications.
***Applies to residential applications
only. See actual warranty
certificate for details.

Easy, innovative solutions for making your garage
more usable and comfortable
Comfort for Your Family

Protection for Your Car

Getting in and out
of the car is more
comfortable when
you have a garage
heater. Plus, you
can avoid the carbon monoxide
buildup that comes from letting your
car idle to warm up.

A warm garage
puts an end to
cold starts, which
can wreak havoc
on engine components. A garage heater helps improve
vehicle reliability by preventing cold/
hard starts at low temperatures.

Warmth for Your Pets

Space for Your
Projects

For pets kept
in the garage
on cold days,
a garage heater
provides a safer
and more reliable alternative to a
portable space heater.

A garage heater
helps keep winter
from getting in
the way of home projects. It also
allows you to store items that would
otherwise freeze, like bottled sodas
and potted plants.

Advanced features for efficiency and durability
Low-profile Cabinet Design with Hanging
Brackets – Allows more overhead space for increased
installation flexibility.

Aluminized, Tubular Heat Exchanger – Provides
excellent heat transfer and enhanced durability.

Direct-spark Ignition – Improves unit operation and
efficiency. No standing pilot flame.

Self-diagnostic Board with LED Display –
Improves troubleshooting e
­ fficiency and accuracy.

Single-piece Burner Assembly – Easily r­emovable
for fast maintenance and service.

Sidewall Venting – Eliminates roof penetrations.
Gas Heating Performance
Model
LF24-30A

© Lennox Industries Inc. 2014
Visit us at www.lennox.com, or
contact us at 1-800-9-LENNOX.
(30W46) Garage Heater 05/14 PC78562

Heating Capacity
Input Btuh (kW)
30,000 (8.8)

Physical Data

Heating
Temp. Rise
Dimensions
Application†
Output Btuh (kW)
°F (°C)
H x W x L (in.)
24,300 (7.1)
42 (6)
1 to 1-1/2 Car Garage 13 x 25 x 24

Shipping Wt.
(lbs.)
60

LF24-45A

45,000 (13.2)

36,500 (10.7)

45 (7)

2 to 2-1/2 Car Garage

13 x 25 x 24

63

LF24-60A

60,000 (17.6)

48,000 (14.1)

55 (13)

3 to 3-1/2 Car Garage

18 x 25 x 25

87

LF24-75A

75,000 (22.0)

60,000 (17.6)

60 (16)

4+ Car Garage

18 x 25 x 25

91

TUA045S

45,000 (13.2)

36,200 (10.6)

45 (7)

2 to 2-1/2 Car Garage

13 x 26 x 25

84

All models are 115 volts- 60 hertz-1 phase.
†Sizing information is provided as an example only. Consult your local Lennox dealer for actual requirements.
Note: D ue to Lennox’ ongoing commitment to quality, all specifications, ratings and dimensions are subject to change without notice.
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