direct fired furnace burners
Wall Hugger Invisiflame WHI
Flat flame furnace burner with Ultra Low NOx emissions of 20 ppm or less.
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Overview
WHI Wall Hugger Invisiflame® burner is designed for applications requiring even heat distribution with no flame impingement and low NOx emissions. The flame hugs the wall, even at high turndown ratios, allowing the burner to be placed close to the load.
Features & Benefits:
Features & Benefits:
- Capacity range: 2000 to 6000 kBTU/h (580 to 1760 kW)
- Ultra low NOx emissions of 20 ppm or less
- Low CO emissions even on cold start
- 8:1 on-ratio turndown
- Flat flame burner with flat flame profile throughout firing range with even heat distribution and no flame impingement
- Low excess air operation (5%) for maximum fuel efficiencyCold or preheated air up to 900ºF (480ºC)
- Direct spark or pilot ignition
- Stable operation at ratio in cold furnace
- Adjustable flange for ease of installation
- Single air and fuel connections
- Available in round or square tile versions
Specifications
Air & Combustion Air Specifications
- Air Temperature Range
- Cold or preheated air up to 900 deg F (480 deg C)
- Excess Air Operation
- Low excess air operation: ~5%
Performance, Flow & Capacity
- Turndown Ratio
- 8:1 on-ratio
Control, Logic & System Behavior
- Operating Modes
- Firing mode (visible flame) and Invisiflame® mode (flameless‑type operation)
Processing & Performance Metrics
- NOx Emissions
- Ultra‑low NOx: 20 ppm or less
- Capacity Range
- 2 to 6 MMBtu/hr (580 to 1,760 kW), depending on air preheat
- CO Emissions
- Low CO emissions, including during cold start
Combustion/Furnace/Chamber Temperatures
- Minimum Furnace Temperature
- 1600 deg F (870 deg C) Invisiflame® Mode
Installation & Mounting Specifications
- Installation Orientation
- Burner can be placed close to the load
- Wall‑mounted
Fuel, Gas & Media Specifications
- Fuel Type
- Clean industrial fuel gas ≥ 500 Btu/ft³ (19.7 MJ/nm³)
Ignition, Flame & Supervision Specifications
- Flame Stability
- Stable operation on‑ratio, including in cold furnaces
- Flame Profile
- Flat flame throughout firing range, even heat distribution, no impingement
- Flame Detection
- UV Scanner (flame detection in Firing mode only)
- Flame Behavior
- Flame hugs wall, suitable for close placement to load
Combustion, Mixing & Fuel Dynamics
- Combustion Principle
- Three‑stage air injection design; flame hugs the furnace wall
Combustion Air, Blower & Emissions Specifications
- Combustion Air
- Cold or preheated air up to 900 deg F (480 deg C)
Overview
- Burner Type
- Wall‑hugging, flat‑flame gas burner
Product Design & Configuration
- Burner Family
- Wall Hugger Invisiflame® (WHI)
Air & Combustion Air Specifications
- Air Temperature Range
- Cold or preheated air up to 900 deg F (480 deg C)
- Excess Air Operation
- Low excess air operation: ~5%
Performance, Flow & Capacity
- Turndown Ratio
- 8:1 on-ratio
Control, Logic & System Behavior
- Operating Modes
- Firing mode (visible flame) and Invisiflame® mode (flameless‑type operation)
Processing & Performance Metrics
- NOx Emissions
- Ultra‑low NOx: 20 ppm or less
- Capacity Range
- 2 to 6 MMBtu/hr (580 to 1,760 kW), depending on air preheat
- CO Emissions
- Low CO emissions, including during cold start
Combustion/Furnace/Chamber Temperatures
- Minimum Furnace Temperature
- 1600 deg F (870 deg C) Invisiflame® Mode
Installation & Mounting Specifications
- Installation Orientation
- Burner can be placed close to the load
- Wall‑mounted
Fuel, Gas & Media Specifications
- Fuel Type
- Clean industrial fuel gas ≥ 500 Btu/ft³ (19.7 MJ/nm³)
Ignition, Flame & Supervision Specifications
- Flame Stability
- Stable operation on‑ratio, including in cold furnaces
- Flame Profile
- Flat flame throughout firing range, even heat distribution, no impingement
- Flame Detection
- UV Scanner (flame detection in Firing mode only)
- Flame Behavior
- Flame hugs wall, suitable for close placement to load
Combustion, Mixing & Fuel Dynamics
- Combustion Principle
- Three‑stage air injection design; flame hugs the furnace wall
Combustion Air, Blower & Emissions Specifications
- Combustion Air
- Cold or preheated air up to 900 deg F (480 deg C)
Overview
- Burner Type
- Wall‑hugging, flat‑flame gas burner
Product Design & Configuration
- Burner Family
- Wall Hugger Invisiflame® (WHI)
- Air Temperature Range : Cold or preheated air up to 900 deg F (480 deg C)
- Turndown Ratio : 8:1 on-ratio
- Operating Modes : Firing mode (visible flame) and Invisiflame® mode (flameless‑type operation)
- NOx Emissions : Ultra‑low NOx: 20 ppm or less
- Minimum Furnace Temperature : 1600 deg F (870 deg C) Invisiflame® Mode
- Installation Orientation : Burner can be placed close to the load|Wall‑mounted
- Fuel Type : Clean industrial fuel gas ≥ 500 Btu/ft³ (19.7 MJ/nm³)
- Flame Stability : Stable operation on‑ratio, including in cold furnaces
- Flame Profile : Flat flame throughout firing range, even heat distribution, no impingement
- Flame Detection : UV Scanner (flame detection in Firing mode only)
- Flame Behavior : Flame hugs wall, suitable for close placement to load
- Excess Air Operation : Low excess air operation: ~5%
- Combustion Principle : Three‑stage air injection design; flame hugs the furnace wall
- Combustion Air : Cold or preheated air up to 900 deg F (480 deg C)
- Capacity Range : 2 to 6 MMBtu/hr (580 to 1,760 kW), depending on air preheat
- CO Emissions : Low CO emissions, including during cold start
- Burner Type : Wall‑hugging, flat‑flame gas burner
- Burner Family : Wall Hugger Invisiflame® (WHI)
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