--- Centrifugal & Cross-Flow Blower Assemblies for Unit Heaters and Warm-Air Furnaces
LONGWELL supplies gas heater blower fan assemblies - centrifugal and cross-flow blowers with certified gas valves, high-temperature motors and durable housings for unit heaters, warm-air furnaces, combustion and infrared heating systems.
We offer a complete range of gas heater blower models to meet different heating and airflow requirements. Please click to view or download the catalog for detailed specifications and selection guidance. If you need technical support or have any questions, feel free to contact us at sales@longwellfans.com or call +86-18358274663.
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● Designed for gas-fired heating systems, providing stable airflow and reliable heating performance.
● Suitable for industrial and commercial gas heater applications.
● Integrates AC gas blower and AC cross flow fan for efficient combustion and uniform hot air distribution.
● Improves overall gas heater blower system efficiency.
● Equipped with pressure switch, thermostat, and thermal cutoff protection.
● Ensures safe operation of gas heater blower assemblies.
● Constructed with high-temperature-resistant components and steel pipe assemblies.
● Supports long-term operation in industrial gas heating systems.
We provide flexible customization based on your heating system requirements:
● Airflow and static pressure adjustment
● Motor voltage: 110V / 220V / 380V
● Motor power selection
● Fan size and structure design
● Control component configuration
● OEM and ODM support
● Our engineering team can match the blower assembly precisely to your heater design.
● The combustion blower supplies controlled airflow for gas burning.
● The gas valve regulates fuel input based on system demand.
● The heat exchanger generates hot air after combustion.
● The cross flow fan distributes heated air evenly into the outlet duct.
● The thermostat and thermal cutoff continuously monitor operating temperature to prevent overheating.
● This coordinated operation ensures high heating efficiency and system safety.
● Stable combustion airflow for reliable ignition
● Uniform hot air distribution through cross flow fan design
● High temperature resistance for continuous operation
● Accurate pressure control using pressure switch
● Long service life AC motor
● Low vibration and stable performance
● Suitable for industrial and commercial duty cycles
1. Die-cast Aluminum or Sheet Metal Housing
● Offers excellent corrosion resistance, lightweight properties, and good structural integrity
● Seal joint treatment, high strength
2. Steel or Aluminium Impellers
● Ensuring structural strength and resistance to creep under high temperatures
● Features forward-curved blades
● Generates high airflow and static pressure at relatively low speeds
● Offering high efficiency and relatively low operational noise
3. Intelligent Integration and Control
● Can be equipped with pressure sensors and impulse transmitters to monitor flue pressure or fan status in real-time
● Signals are fed back to the boiler’s main control system, enabling airflow fault
● alarms, or interlocked control, enhancing system automation and safety
4. AC Shaded Pole Motor
● Stable Operating Motor
● Effectively prevents motor overheating and shortened lifespan due to prolonged heat exposure
● Reduces the transmission of vibration and noise from the fan unit to the building structure, significantly lowering operational noise
We serve as your single-source supplier, offering OEM components, full kits, and technical support, which streamlines your procurement process and ensures perfect compatibility.
We have rigorously validated all components for heater applications, including fans, pressure relief valves, thermostats, gas valves, PCB control boards, and more. Through precise calibration and integration, these components are perfectly matched to work in harmony, achieving optimal control, extended service life, maximum efficiency, and superior stability.
Engineered for compact heating units, our blower assemblies deliver precise combustion air while quietly distributing warmth. They fit tight chassis designs and ensure high thermal efficiency, making them the standard choice for residential and light-commercial wall heaters.
Optimizes thermal transfer for electric heating elements. The integrated AC cross-flow fan creates a wide, uniform air curtain that distributes heat evenly without the noise, making it suitable for quiet indoor environments requiring rapid electric heating.
Built for high-ceiling environments like warehouses and workshops. These blowers provide the high static pressure needed to drive heat across large volumes, ensuring rapid air turnover and consistent temperature stratification in industrial spaces.
Designed for the road. These assemblies are ruggedized to withstand vibration and mobile voltage fluctuations. They provide rapid cabin heating and defrosting capabilities for buses, trains, and specialized vehicles.
Critical for livestock health. Our blowers provide precise ventilation and uniform heat distribution, eliminating dangerous drafts while maintaining the stable temperatures required for optimal poultry growth and feed conversion.
Supports uniform crop growth. These assemblies circulate air effectively to eliminate micro-climates, ensuring consistent humidity and temperature levels essential for commercial agriculture and research facilities.
A drop-in solution for the aftermarket. Designed to match standard mounting footprints, our assemblies allow technicians to easily upgrade or repair existing gas and electric heaters, restoring original performance with minimal downtime.
The combustion blower supplies air for gas burning, while the circulation fan distributes heated air into the application space.
Yes. Airflow, pressure, motor specifications, and system configuration can all be customized.
Yes. The assembly is designed for stable operation under high-temperature industrial environments.
Product certificates cover only the models listed on each document — ask which ones apply to your model. ISO certificates cover management systems, not products. Declaration of Conformity for your model and destination on request.
All document scans and what each coversSpecified and drawn by LONGWELL, built to our drawings by qualified partner factories, inspected and released to LONGWELL standards.
