Square Footage	Furnace BTU
1,000-1,200 sq. ft. Home	40,000 - 60,000 BTU
1,200-1,500 sq. ft. Home	60,000 BTU
1,500-1,800 sq. ft. Home	60,000 - 80,000 BTU
1,800-2,500 sq. ft. Home	80,000 - 100,000 BTU
2,500-3,500 sq. ft. Home	100,000 to 120,000 BTU

Coleman LX Series Z9ET Review: High-Efficiency Heating with Dual-Stage Performance

Average Price (Installed): $4,500 – $5,250
AFUE Rating: 97%
BTU Input: 60,000 – 120,000
BTU Output: 58,000 – 116,000
Burner Type: Two-Stage
Blower Motor: Variable-Speed ECM
ENERGY STAR® Certified: No
Warranty: Base – 5 years (Parts), 20 years (Heat Exchanger); Registered – 10 years (Parts), Lifetime (Heat Exchanger)

Top Features

97% AFUE: High-efficiency design converts nearly all fuel into usable heat.
Dual-Stage Burner: Adjusts heat output to maintain precise indoor temperatures.
Variable-Speed ECM Blower: Optimizes airflow for even heat distribution and quieter operation.
Strong Warranty Coverage: Extensive protection for parts and heat exchanger.

The Bottom Line

The Coleman LX Series Z9ET is a high-efficiency furnace offering dual-stage operation and a variable-speed blower, providing reliable comfort and energy savings. While it lacks ENERGY STAR® certification, its 97% AFUE rating ensures substantial fuel efficiency, and the robust warranty adds peace of mind for homeowners.

In-Depth Review

Heating Efficiency

The Z9ET delivers nearly all the energy it consumes as heat, reducing waste and keeping energy bills low. Key efficiency features include:

Dual-Stage Burner: Automatically adjusts output based on demand for precise temperature control.
Variable-Speed ECM Blower: Ensures consistent airflow and even heat distribution.
Advanced Heat Exchanger: Enhances heat transfer and overall system efficiency.

Comfort and Performance

Two-Stage Operation: Runs at lower capacity most of the time for steady temperatures; ramps up when extra heating is needed.
Variable-Speed Blower: Provides smoother airflow, reduces noise, and improves indoor air quality and humidity control.

Noise Reduction

While not ultra-quiet, the Z9ET benefits from:

Variable-Speed ECM Blower: Runs at lower speeds during normal operation.
Sealed Cabinet Design: Reduces sound transmission for quieter performance compared to single-stage furnaces.

Safety Features

Coleman incorporates essential safety mechanisms:

Automatic Shutoff: Activates in case of overheating.
Sealed Combustion System: Minimizes carbon monoxide risk.
Pressure Switches: Monitor airflow and system operation to ensure safe performance.

Warranty Information

The Z9ET comes with strong coverage for long-term peace of mind:

Base Warranty: 5 years on parts, 20 years on the heat exchanger
Registered Warranty: 10 years on parts, lifetime on the heat exchanger
Unit Replacement Warranty: 5 years

Registering the unit within the required period is essential to access the full benefits of the extended warranty.

Installation and Sizing

The Z9ET supports flexible installation, including upflow, horizontal, and downflow setups. Its compact design allows it to fit in basements, utility rooms, or other tight spaces with ease.

Final Verdict

The Coleman LX Series Z9ET is a high-efficiency, dual-stage furnace that delivers consistent comfort, energy savings, and reliable performance. With a 97% AFUE rating, variable-speed blower, and comprehensive warranty coverage, it’s an excellent choice for homeowners seeking a cost-effective and dependable heating solution.