1. Introduction
This manual provides essential instructions for the safe and efficient operation of your HearthSense IR16T-BB Ventless Dual Fuel Infrared Space Heater. This heater is designed to provide supplemental heat for indoor residential use, utilizing either natural gas or liquid propane. Please read this manual thoroughly before installation or operation and retain it for future reference.

Figure 1: Front view of the HearthSense IR16T-BB Ventless Dual Fuel Infrared Space Heater.
2. Safety Information
Your safety and the safety of others are paramount. Always adhere to the following safety precautions:
- Ventilation: This is a ventless heater, but adequate ventilation is still required. Ensure the room has sufficient air circulation.
- Oxygen Depletion Sensor (ODS): The heater is equipped with an ODS system that automatically shuts off the unit if oxygen levels in the room become too low. Do not tamper with or bypass this safety device.
- Fuel Type: This heater operates on either natural gas or liquid propane. Ensure the correct fuel type is connected and that all gas connections are secure and leak-free.
- Propane Tank Requirement: For optimal performance and consistent fuel vaporization, especially in colder temperatures, a minimum 100lb propane tank is recommended for liquid propane operation.
- Location: Do not install or use this heater in a bedroom, bathroom, recreational vehicle, or any unventilated space. Maintain proper clearances from combustible materials as specified in the installation section.
- Children and Pets: Keep children and pets away from the heater, especially when it is operating, as surfaces can become very hot.
- Flammable Materials: Never store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.
- Professional Installation: Gas connections should be performed by a qualified professional in accordance with local codes and regulations.

Figure 2: Overview of key features and safety aspects.
3. Package Contents
Carefully unpack the heater and verify that all components are present and undamaged. If any parts are missing or damaged, do not attempt to install or operate the heater. Contact customer support immediately.
- HearthSense IR16T-BB Heater Unit
- Wall Mount Bracket
- Base Feet (for freestanding installation)
- Blower (pre-installed or included separately, depending on model)
- Hardware for installation

Figure 3: Included components for installation.
4. Setup and Installation
The HearthSense IR16T-BB heater can be installed as a wall-mounted unit or used as a freestanding unit with the included base feet.
4.1 Wall Mounting
- Select a suitable wall location, ensuring proper clearances from combustible materials (refer to the heater's label for specific distances).
- Securely attach the wall mount bracket to wall studs using appropriate hardware.
- Carefully lift and hang the heater unit onto the installed wall mount bracket.

Figure 4: Heater installed as a wall-mounted unit.
4.2 Freestanding Installation
- Attach the base feet to the bottom of the heater unit using the provided screws.
- Place the heater on a level, non-combustible surface, ensuring stability and proper clearances.

Figure 5: Heater used as a freestanding unit.
4.3 Gas Connection
Connect the heater to your natural gas or liquid propane supply. This connection must be performed by a qualified gas technician. Ensure all connections are tight and tested for leaks using a non-corrosive leak detection solution.
4.4 Blower Installation (If Applicable)
If your model includes a separate blower, follow the instructions provided with the blower for installation. The blower typically requires an electrical connection to operate, while the heater itself does not require electricity for heating.
5. Operating Instructions
Follow these steps to safely operate your HearthSense IR16T-BB heater.
5.1 Lighting the Pilot
- Ensure the gas supply is turned on.
- Turn the control knob to the "OFF" position, then push it in and wait for 5 minutes to allow any accumulated gas to dissipate.
- Turn the control knob to the "PILOT" position, then push and hold it in.
- While holding the knob in, press the "IGNITOR" button repeatedly until the pilot flame ignites. You should see a small flame at the pilot burner.
- Continue to hold the control knob in for approximately 30-60 seconds after the pilot ignites to allow the thermocouple to heat up.
- Release the control knob. If the pilot flame extinguishes, repeat steps 3-5.
5.2 Adjusting Heat Output
- Once the pilot is lit, turn the control knob from the "PILOT" position to the desired heat setting (1-5).
- The heater features 5 variable heat settings, allowing you to adjust the heat output from Low to High.

Figure 6: Thermostat controls and ignitor button.

Figure 7: Detailed view of the control knob settings.
5.3 Turning Off the Heater
To turn off the main burner, turn the control knob to the "PILOT" position. To completely shut off the heater, turn the control knob to the "OFF" position and turn off the main gas supply valve.
5.4 Product Video Overview
Video 1: An official overview of the HearthSense 20,000 BTU Infrared Heater, demonstrating its features and operation.
6. Maintenance
Regular maintenance ensures the longevity and safe operation of your heater.
- Cleaning: Keep the heater's exterior clean by wiping it with a soft, damp cloth. Do not use abrasive cleaners or solvents. Ensure the air intake and exhaust vents are free from dust and obstructions.
- Pilot and Burner Inspection: Periodically inspect the pilot and main burner for proper flame appearance. The pilot flame should be steady and blue. Any yellowing or flickering may indicate a problem requiring professional service.
- Gas Connections: Annually check all gas connections for leaks using a leak detection solution.
- Storage: If storing the heater for an extended period, ensure the gas supply is turned off and the unit is clean and dry.
7. Troubleshooting
If you encounter issues with your heater, refer to the following troubleshooting guide. For problems not listed or if issues persist, contact a qualified service technician.
| Problem | Possible Cause | Solution |
|---|---|---|
| Pilot light will not light or stay lit. | No gas supply; Air in gas line; Thermocouple not heating sufficiently; ODS system activated. | Ensure gas supply is on; Bleed air from gas line; Hold control knob longer after ignition; Check for adequate ventilation. |
| Main burner does not ignite. | Pilot light not lit; Control knob not set to a heat position. | Light the pilot light; Turn control knob to a numbered heat setting. |
| Heater produces insufficient heat. | Low heat setting; Inadequate fuel supply (especially with small propane tanks). | Increase heat setting; Ensure propane tank is at least 100lb for consistent vaporization. |
| Heater shuts off unexpectedly. | ODS system activated (low oxygen); Overheat protection activated; Gas supply interrupted. | Increase ventilation; Check for obstructions around heater; Verify gas supply. |
Note on Blower: While the product description may mention an included blower, some models or specific packages may not include it, or it may be an optional accessory. Please verify the contents of your package upon receipt. If a blower is desired and not included, it may need to be purchased separately.
8. Specifications
| Feature | Detail |
|---|---|
| Model Number | IR16T-BB |
| Heat Output | 20,000 BTU (Natural Gas), 18,000 BTU (Propane) |
| Heating Coverage | Up to 950 sq. ft. |
| Fuel Type | Natural Gas or Liquid Propane (Dual Fuel) |
| Ignition Type | Piezo Ignition |
| Control Type | Manual Control with Thermostat (5 Variable Heat Settings) |
| Safety Features | Oxygen Depletion Sensor (ODS), Overheat Protection, ANSI Certified |
| Dimensions (D x W x H) | 8"D x 21"W x 26"H |
| Mounting Options | Wall-mountable, Freestanding (with included base feet) |
| Electrical Requirement | None for heating operation; Blower (if included) requires 110V outlet. |

Figure 8: Heater dimensions.
9. Warranty and Support
For warranty information, technical assistance, or to order replacement parts, please contact Hearth Sense customer support. Keep your purchase receipt and model number readily available when contacting support.
Contact information for Hearth Sense can typically be found on the product packaging or the manufacturer's official website.