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Compact units with induced combustion, hot surface ignition, and aluminized tubular heat exchangers for residential and commercial applications.
Highlights include easy installation, self-diagnostics, low amp requirements, propane conversion, and safety features.
Details on cabinet sizes and duct connection dimensions for various models, including weights.
Provides input/output ratings, AFUE, temperature rise, blower specs, and wire size recommendations.
Approved method for horizontal venting using an auxiliary power vent for specific installation scenarios.
Airflow capacity data is shown without filters; field-installed filters are required externally.
Specifies recommended filter sizes (e.g., 16x25, 20x25) based on cabinet size and CFM.
Defines required clearances from furnace surfaces to combustible materials for various installation configurations.
Lists optional accessories for propane conversion, filter racks, chimney kits, floor base kits, and pressure switches.
Table detailing airflow (CFM) for different models across various static pressures and speed settings.
Compact units with induced combustion, hot surface ignition, and aluminized tubular heat exchangers for residential and commercial applications.
Highlights include easy installation, self-diagnostics, low amp requirements, propane conversion, and safety features.
Details on cabinet sizes and duct connection dimensions for various models, including weights.
Provides input/output ratings, AFUE, temperature rise, blower specs, and wire size recommendations.
Approved method for horizontal venting using an auxiliary power vent for specific installation scenarios.
Airflow capacity data is shown without filters; field-installed filters are required externally.
Specifies recommended filter sizes (e.g., 16x25, 20x25) based on cabinet size and CFM.
Defines required clearances from furnace surfaces to combustible materials for various installation configurations.
Lists optional accessories for propane conversion, filter racks, chimney kits, floor base kits, and pressure switches.
Table detailing airflow (CFM) for different models across various static pressures and speed settings.
This document describes a range of compact, gas-fired residential furnaces, specifically the TM8X/TMLX models, designed for single-stage, multi-position operation. These units are suitable for both standard and low NOx applications, with natural gas inputs ranging from 60 to 120 MBH.
The primary function of these furnaces is to provide heating for residential and light commercial spaces. They achieve this through induced combustion, utilizing reliable hot surface ignition and high heat transfer aluminized tubular heat exchangers. The units are factory-shipped for installation in upflow or horizontal configurations and can be easily converted for downflow applications, offering flexibility in installation. They are designed for various residential settings such as basements, closets, alcoves, attics, recreation rooms, or garages, and are also suitable for commercial use. Each unit is factory assembled, wired, and tested to ensure safe, dependable, and economical operation. These furnaces are Category I listed and can be common vented with other gas appliances in accordance with the National Fuel Gas Code.
These furnaces offer significant versatility and ease of use. They can be easily applied in upflow, horizontal left or right, or downflow installations with minimal conversion required. Their compact design, with an ideal height of 33 inches, makes them easy to install in various spaces.
For cooling applications, a blower-off delay feature is included to improve SEER (Seasonal Energy Efficiency Ratio). Access to controls for power and control wiring is straightforward. The integrated control module incorporates built-in, high-level self-diagnostics with a fault code display, ensuring reliable operation and simplifying troubleshooting.
The units have a low amp requirement, making them suitable for easy replacement applications. All models are convertible to use propane (LP) gas, providing flexibility for different fuel sources. The electronic hot surface ignition system enhances fuel cost savings, dependability, and reliability. For safety, a 100% shut-off main gas valve is included.
The furnaces are equipped with a 5-speed direct drive, X13 style high-efficiency DC motor, contributing to lower electrical power usage and improved A/C SEER ratings. A 24V, 40 VA control transformer and blower relay are supplied for add-on cooling. The hi-tech tubular aluminized steel primary heat exchanger ensures efficient heat transfer.
Comfort is enhanced by a timed-on, adjustable-off blower capability. A blower door safety switch is integrated for user protection. The solid removable bottom panel allows for easy conversion between different configurations. Low NOx models are specifically designed to meet stringent code requirements.
Airflow leakage is less than 1% of the total airflow at ductblaster conditions, ensuring efficient operation. The design eliminates knockouts, simplifying installation. Movable duct connector flanges provide application flexibility. The inducer operation is quiet, and its ability to rotate allows for easy conversion of venting options. The fully supported blower assembly provides easy access and removal for maintenance.
External air filters are used, offering maximum flexibility to meet customers' indoor air quality (IAQ) needs. Venting applications can involve common venting with other gas-fired appliances or use a masonry chimney. For convenience, 1/4 turn knobs are provided for easy door removal. The blower compartment is insulated for both thermal and acoustic performance, contributing to quieter operation and energy efficiency.
The design of these furnaces incorporates features that simplify maintenance and ensure long-term reliability. The easy access to controls and the fully supported blower assembly facilitate inspection and servicing. The built-in self-diagnostics with fault code displays on the integrated control module aid in quickly identifying and resolving operational issues.
The removable bottom panel and 1/4 turn door knobs allow for straightforward access to internal components for cleaning or repair. The use of external air filters means that filter maintenance is separate from the furnace cabinet, preventing the need to open the furnace itself for routine filter changes. It is explicitly stated that filters should not be installed inside the furnace, which simplifies filter replacement and prevents potential damage to internal components.
The robust construction with aluminized tubular heat exchangers and a 100% shut-off main gas valve contributes to the durability and safety of the unit, reducing the frequency of major repairs. The ability to convert to LP gas also means that the unit can be adapted to different fuel sources if needed, potentially extending its useful life in various settings.
General| Efficiency | 80% AFUE |
|---|---|
| Heat Exchanger Material | Aluminized Steel |
| AFUE Rating | 80% |
| Stages | Single Stage |
| Fuel Type | Natural Gas |
| Configuration | Upflow, Horizontal |
| Heating Capacity | 40, 000 to 120, 000 BTU/h |
| Warranty | 10-Year Heat Exchanger Limited Warranty, 5-Year Parts Limited Warranty |
