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Garage Heater

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Lennox Garage Heater LS25 Unit Heater

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Lennox Garage heaters Garage Heater Repair, maintenance, and replacement planning
Lennox LS25 Unit Heater product image

Technical Specifications

Product Specs

  • Equipment type: separated-combustion gas unit heater
  • Capacity note: 125-400 kBtuh models support rotatable fresh-air intake
  • Efficiency note: LS25-250 through LS25-400 kBtuh models are listed as up to 5% more efficient than standard efficiency direct-fired unit heaters
  • Lennox model family: LS25
  • Product category: Garage Heater
  • System role: garage or utility-space unit heater
  • Brand: Lennox
  • Model or series: LS25 Unit Heater
  • Product group: Garage heaters
  • Application: Residential, light-commercial, or managed-property comfort applications
  • Compatibility check: Verify exact model, serial number, capacity, voltage, controls, and installation configuration.
  • Verified source: lennox.com

Useful troubleshooting details

  • Confirm the unit heater model and serial number, gas type, venting, combustion air, thermostat, voltage, and space served.
  • Share no heat, ignition, flame, inducer, venting, blower, lockout, noise, or thermostat symptoms.
  • For replacement planning, include ceiling height, mounting location, vent path, combustion-air setup, and access notes.

Service planning

How GreenFlow handles LS25 Unit Heater requests

1

Identify the equipment

Confirm the model or series name, serial number if available, photos, and whether the unit is roof, exterior, basement, or mechanical-room equipment.

2

Describe the service issue

Share no heat, no cooling, weak airflow, error codes, alarms, leaks, noise, control problems, or comfort complaints.

3

Review access and history

Include access notes, tenant or business-hour constraints, filter status, recent repairs, and maintenance records when available.

4

Plan the next step

GreenFlow can route the request for diagnostics, repair planning, maintenance, replacement scope, or related system upgrades.

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Jack B.

Andrey always does a great job.

Neal V.

In an industry that often fraught with contractors taking advantage of homeowners, Andrey was honest with his assessment and willing to install a product acquired elsewhere (most want that margin themselves), patiently answered my questions (I’m an engineer so like to understand what’s happening), and proactively offered practical...

Randy J.

Thanks to Andrey for an amazingly quick response to my request for a service call. He diagnosed and fixed my issue within 24 hours of my asking for help. Excellent service. Thanks.

Anna G.

They quickly identified the issue with the heating system and fixed it efficiently. He explained everything clearly and made sure I understood what was going on. Very professional and reliable, extremely satisfied with the service.

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