POLISH PRODUCT Electric unit heater EHU-3S
The EHU electric unit heater is a professional heating solution designed for demanding industrial facilities such as production halls, warehouses, factories and shops. Manufactured in Poland, it stands out for its robust construction, with a casing made of high-quality carbon steel, which guarantees long-term durability and resistance to mechanical damage.
About the product
EHU is an electric unit heater designed for heating demanding industrial facilities — production halls, warehouses, factories and shops. Unlike LPHW unit heaters, it does not require a water installation or any other heating systems, which greatly simplifies installation and operation.
Heating is provided by a self-regulating PTC heater with a 2-stage output of 7 kW or 14 kW, which automatically adjusts its operating intensity to current needs, eliminating the risk of overheating and limiting energy consumption. A three-speed fan with an IP54-rated AC induction motor ensures optimal air circulation in the range from 1200 to 3000 m³/h.
The powder-coated carbon steel casing guarantees long-term durability and resistance to mechanical damage and external conditions. Integrated louvres allow the airflow direction to be adjusted manually, while compatibility with the dedicated HMI VOLT controller enables thermostat programming and management of up to 10 units simultaneously. Low operating costs — especially combined with photovoltaic panels — make the EHU an economical solution even with intensive use.
Key features
- Airflow efficiency from 1,200 m³/h to 3,000 m³/h
- Powder-coated carbon steel casing
- Self-regulating PTC heater
- 2-stage heating power: 7 kW or 14 kW
- AC induction motor with IP54 rating
- 3-speed fan regulation
- Manufactured in Poland
Why a unit heater with a PTC heater?
Unit heaters equipped with a PTC heating element are a modern and energy-efficient solution. The self-regulating temperature function eliminates the risk of device overheating, increasing safety and extending its service life. Automatic power adjustment reduces energy consumption, and rapid heating ensures performance even in demanding conditions.
| Feature | PTC heater | Conventional heater |
|---|---|---|
| Safety | Self-regulating temperature prevents overheating and eliminates fire risk. | Require additional overheating protection; risk of failure without adequate control. |
| Energy efficiency | Automatic power adjustment to temperature — optimises energy consumption. | Constant power regardless of conditions. |
| Heating method | Uniformly heated element surface. | Uneven conductor heating — hot and cold spots occur. |
| Durability / Service life | Long service life thanks to resistance to physical and chemical factors and minimised overheating risk. | Hot and cold spots reduce service life. Higher susceptibility to physical and chemical factors. |
| Warm-up time | Optimal operating temperature is reached faster. | Longer heating time of the element surface. |
| Sensitivity to voltage fluctuations | Low sensitivity to supply voltage changes. | Higher sensitivity to voltage fluctuations, which may affect performance. |
| Cost-effectiveness | Longer service life and lower energy consumption = savings. | Shorter service life and higher energy consumption = no savings. |
An additional safeguard for the PTC heater is the monitoring relay. Its purpose is to measure the current drawn by the fan. If the current draw is too high or too low relative to the nominal value, the monitoring relay will prevent the heaters from switching on. The monitoring relay protects the system against switching on the PTC heater at a moment when the fan is not running.
Technical specification
| Parameter | EHU-3S unit heater |
|---|---|
| Product code | EHU14-3S-2503 |
|
Max. airflow [m³/h] 3rd / 2nd / 1st stage |
3000 / 2000 / 1200 |
| Voltage / frequency [V/Hz] | 400 / 50 |
| Heater output [kW] | 7 / 14 |
|
Motor power [W] 3rd / 2nd / 1st stage |
185 / 140 / 90 |
| IP protection rating | 54 |
| Waga netto [kg] | 25 |
|
Noise level [dB*] 3rd / 2nd / 1st stage |
57 / 55 / 49 |
* measured at a distance of 5 m
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