AirTS | Recirculated Air Electric Heating Unit

Working Principle Technical comparison Specification Application Download Inquire Now

PTC Electric Heating Solution for High-Bay Industrial Spaces

Designed for factories, warehouses, hangars and other buildings with high ceilings. AirTS electric recirculated air heating units recover warm air from the upper space and deliver it downward to the occupied zone, helping reduce temperature stratification and cold spots.

Installation height: 4–17 m for standard models
Circulating air volume: Up to 9,700 m³/h
Power supply: 380 V, 3-phase
Adjustable air volume and outlet angle
Wireless and centralized control available
Heating capacity and system layout can be customized

Why Choose This Electric Recirculated Air Heater?

● Electric heating option for large-space HVAC: Unlike gas or hot water systems, this recirculated air electric heater uses PTC-type electric heating elements—ideal for facilities where hot-water or steam is unavailable but a clean, efficient heating system is required.

● Effective recirculation of high-bay air: The unit draws warm air from the upper region of the facility, re-pressurises it via a high static pressure axial fan, then distributes it downward through converging nozzles and louvers for even temperature in the occupied zone.

● Optimised for large volume spaces (4-30 m high): Suitable for large-space warehouses, manufacturing plants, hangars, exhibition halls where the volume is significant and conventional electric heaters cannot provide sufficient throw or uniformity.

● Energy-efficient electric heating for recirculated air systems: By recirculating air rather than heating entirely fresh outside air, this system reduces energy input and heat losses—making it a smart choice for energy-saving electric recirculated air heating solutions.

● Flexible installation & control: Variable frequency fan drive, wireless or linked control, automatic monitoring of data and safety features like fall-protection alarms, filter-self-cleaning—makes it part of smart industrial HVAC system.

● Improved comfort and productivity: Even, consistent warmth in the working zone means fewer cold spots, no large temperature gradients, better employee comfort and safer operations—in turn improving productivity.

Recirculated Air Electric Heating Unit Benefits

Feature	Benefit
PTC electric heating elements	Clean, rapid heat without combustion.
High static-pressure axial fan & converging nozzle	Long air-throw (up to ~16 m) and even distribution.
Recirculated air strategy	Reduces heat loss, improves energy efficiency, lowers running cost.
Smart controls and self-monitoring	Automated operation, reduced manual oversight, lower maintenance.
Wide installation height (4 m-30 m)	Versatile for varied industrial spaces.
Uniform thermal comfort in large spaces	Better worker comfort, reduced cold spots and stratification.

Recirculated Air Electric Heating Unit Working Principle

When PTC heater starts working, the efficient heat exchanger in the equipment is used to achieve rapid heating of the air.

The large wind pressure axial fan installed on the top is used to forcedly press the hot air down. Then the air is subject to pressure boost twice through the silencer sponge and the lower trapezoidal convergence, swirls out from the nozzle through the guide vane and is distributed throughout the space from top to down.

Recirculated Air Electric Heating Unit Features

By adjusting wind speed and air outlet angle, it achieves comfortable heating environment

Supply air angle stepless regulation

Utilize axial fan to efficiently recover heat from the top, reducing heat loss from the roof, achieving energy-saving effects

High: continuously recover heat from the top space to send the heat to the working area at the bottom

Large: the devices in the space are arranged uniformly with even heat distribution

Space: decrease the temp of roof and surrounding walls, decrease the temp difference with the outside, and reduce heat loss

Long air supply distance, high hot air volume

Function: heating

Recirculated Air Electric Heating Unit Functions

Fall prevention warning monitoring

Working data collection and analysis

Electric Heating

Wireless intelligent control

Filter net self-cleaning

Wireless control

Support full linkage control

Light breeze air supply

Technical Comparison

AirTS top heating unit

High and large space air conditioner lifted on the roof

It achieves heating air from the air exchanger in the equipment

It distributes the hot air by means of efficient air distributor, which eliminate the undesirable indoor temp layers

Comfortable heating environment without wind feeling sense

Bottom heating unit

In high large space with great depth, using radiator can allow natural air convection as hot air rises

It can only radiate into small area with the range less than 5m. The heat rising to the roof will be dissipated and the temp cannot be achieved effectively in the middle area.

Radiator heating requires high requirements for supply water temp.

AirTS units temp field

Our heating units forcedly and quickly send the hot air down, make the temp in the working area rise rapidly.

Radiator heating temp field

It can be seen from the radiator heating temp field image that the heat is mainly gathered on the roof and the temp is low in the lower working area.

PTC Electric Recirculated Air Heating Unit

Specification

Recirculated Air Electric Heating Unit

Recirculated Air Electric Heating Unit
Model		AirTS-ED-I	AirTS-ED-II
Rotating speed of fan	r/min	0～900	0～860
Standard circulating air volume	m³/h	0～6700	0～9700
Voltage	V	380±5%	380±5%
Electric power	kW	0～0.85	0～1.80
Current	A	0～1.65	0~3.60
Suitable installation height	m	4~10	4~17
PTC heater control mode		Linkage	Linkage
Control mode		VAV stepless regulation	VAV stepless regulation
Noise	dB	<60	<60

Recirculated Air Electric Heating Unit

Dimension
Model		AirTS-ED-I	AirTS-ED-II
A	mm	900	1100
B	mm	1200	1505
C	mm	735	920
E	mm	100	100
F	mm	150	150
G	mm	480	568
H	mm	765	935
J	mm	170	180
K	mm	400	400
Weight	kg	120	170

Recirculated Air Electric Heating Unit Applications & Suitable Scenarios

High-bay logistics warehouses, distribution centres with crane runways and mezzanine levels.

Manufacturing plants, assembly lines, CNC workshops, where overhead cranes or gantries occupy ceiling space and require heating at floor level.

Aircraft hangars, vehicle maintenance bays, indoor sports halls, large showrooms—any large-volume indoor space requiring uniform warm-air delivery.

Electric heating retrofit projects in facilities where hot-water or steam systems are unavailable, where a plug-in/ electrically driven recirculated air electric heater for industrial spaces is desirable.

Projects focusing on industrial HVAC electric heating systems for large volume space, with minimal installation complexity of fuel supply or boiler systems.

AirTS-D vs AirTS-DM vs AirTS-ED: Which Heating Unit Should You Choose?

AirTS offers several recirculated air heating unit configurations for factories, warehouses, aircraft hangars, logistics centers and other high-ceiling buildings. The main differences are the heat source, air outlet design, airflow capacity and installation requirements.

Heating Unit	AirTS-D Ceiling-Mounted Unit	AirTS-DM Louvered Unit	AirTS-ED Electric Unit
Heat Source	Hot water at 40–90°C or steam below 120°C	Hot water at 40–90°C or steam below 120°C	PTC electric heating
Standard Models	AirTS-D-I / AirTS-D-II	AirTS-DM-I / AirTS-DM-II	AirTS-ED-I / AirTS-ED-II
Standard Air Volume	Up to 6,700 / 9,700 m³/h	Up to 5,500 / 10,500 m³/h	Up to 6,700 / 9,700 m³/h
Recommended Installation Height	4–10 m / 4–17 m	4–8 m / 4–17 m	4–10 m / 4–17 m
Air Outlet Design	Converging air distributor with guide vanes	Adjustable louvered air outlet	Converging air distributor with guide vanes
Boiler or Pipeline Required	Yes	Yes	No
Main Advantage	Balanced airflow and uniform downward heat distribution	Flexible air direction and targeted heating	Simple electric heating installation without a central heat source
Suitable Projects	New or existing buildings with hot-water or steam systems	Buildings requiring adjustable air direction or zoned heat distribution	Buildings without boilers, steam or hot-water pipelines

Which Heating Unit Should You Choose?

Choose AirTS-D if the building already has a hot-water or steam system and requires uniform downward air distribution.
Choose AirTS-DM if adjustable louvers are needed to direct warm air toward specific work areas.
Choose AirTS-ED if no boiler or heating pipeline is available and electric heating is preferred.

For accurate model selection, provide the building size, installation height, required temperature and available heat source.

How to Select the Right Electric Heating Unit

Project Condition	Recommended Model
Installation height of 4–10 m	AirTS-ED-I
Installation height of 10–17 m	AirTS-ED-II
Higher airflow or larger coverage required	AirTS-ED-II
Building height above 17 m	Request customized engineering evaluation
Irregular layout or multiple heating zones	Use multiple units with centralized control
Limited boiler, gas or hot-water infrastructure	Electric PTC heating solution
Heating only specific working areas	Ask for zoned heating layout

Final model selection should be based on building dimensions, installation height, insulation level, minimum outdoor temperature, required indoor temperature, door-opening frequency and available electrical capacity. AirTS engineers can calculate the heating load and recommend the model, quantity and installation positions.

Why Partner with AirTS for Electric Recirculated Air Heating Solutions?

Since 2005, AirTS has specialized in large-space HVAC solutions—especially for high-bay, long-span industrial buildings. Our expertise spans design, manufacture, installation and service. With an electric recirculated air heating unit from AirTS, you gain not just a heater, but a full large‐space industrial electric air heater system supported by 24-hour technical service and global logistics capability.

Frequently Asked Questions (FAQs)

1. What is a Recirculated Air Electric Heating Unit?

A Recirculated Air Electric Heating Unit is an industrial heating device that uses electric heating elements instead of hot water or steam. It draws existing indoor air, reheats it, and circulates it evenly throughout the space — reducing temperature differences and energy loss in large or high-ceiling buildings.

2. What makes the electric version different from other heating units?

Unlike water-based or steam-based systems, the electric recirculated air heating unit offers a plug-and-play installation with no need for boilers or pipelines. It provides instant heat, easier maintenance, and is ideal for buildings without access to a central heating source.

3. What kind of heating elements does it use?

AirTS uses PTC (Positive Temperature Coefficient) electric heating elements, known for their high efficiency, fast heat response, and self-regulating temperature control. This ensures reliable performance and longer service life compared to conventional resistance heaters.

4. Is it suitable for large or high-bay spaces?

Yes. The system is specially engineered for large-volume buildings between 4 m and 30 m high, such as:

● Industrial workshops

● Warehouses and logistics centers

● Aircraft hangars

● Assembly halls and maintenance facilities
Its powerful fan and optimized air outlet ensure that warm air reaches the working zone quickly and evenly.

5. How does recirculated air technology improve efficiency?

Instead of constantly heating cold outside air, the unit recirculates and reheats existing indoor air, which drastically reduces heat loss and power consumption. This design makes it a high-efficiency electric heating system for large industrial spaces.

6. Can it be connected to smart or automated control systems?

Yes. AirTS electric heaters can integrate with smart HVAC control systems and IoT-based building management. Options include:

● Wireless remote control

● Variable Frequency Drive (VFD) for airflow adjustment

● Temperature and humidity sensors

● Centralized energy monitoring

7. How is the noise level during operation?

Despite the strong air volume and pressure, the electric recirculated air heating unit operates at a low noise level, thanks to its balanced fan design, aerodynamic louvers, and precision manufacturing. It’s suitable for continuous operation in production or warehouse environments.

8. Is the system easy to install and maintain?

Absolutely. Installation requires only an electrical power connection — no boiler, no piping, no additional heating source. Maintenance is minimal due to the unit’s modular design, self-cleaning air filters, and corrosion-resistant casing.

9. What safety features are included?

Each AirTS electric heating unit is equipped with:

● Overheat protection

● Automatic power shut-off in abnormal conditions

● Anti-fall alarm for suspended models

● Fan delay control to prevent overheating after shutdown
These ensure safe and reliable long-term operation in any industrial environment.

10. How can I choose the right model or get a quotation?

You can simply click “Inquire Now” and send us your project details — including building dimensions, required temperature range, and power supply.
Our engineers will recommend the most suitable electric air recirculation heating unit model and provide a customized quotation within 24 hours.

Still Have Questions About Electric Recirculated Air Heating Systems? Contact our technical experts at AirTS for a free consultation and tailored design for your project.