Purchase the High-Quality Electrical Enclosure Heater KDM is the Best Manufacturer and Supplier in China.

  • Most efficient Electrical Enclosure Heater
  • Robust-Compact Finishes
  • Long-lasting Services Offered
  • CE, UL, NEMA, IEC Confirmed Certified

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Electrical Enclosure Heaters
200w Enclosure Heater
200w Enclosure Heater

200w Enclosure Heaters are suitable in a hazardous environment location. These have a high-performance heating capacity with IP66 rating protection. KDM manufactured various wattage and capacity for your electrical enclosures.

Ceramic Enclosure Heater
Ceramic Enclosure Heater

Ceramic Enclosure Heater comes high-standard with a penetrated stainless steel protection guard connected. These are well-built enclosure heater that provides quick-installation.

Explosion-Proof Enclosure Heaters
Explosion-Proof Enclosure Heaters

Explosion-Proof Enclosure Heaters are ideal in explosion hazards location. This heater provides the prevention of failure of electronic devices caused by corrosion and freezing.

Fan Enclosure Heaters
Fan Enclosure Heaters

Fan Enclosure Heaters run a power circuit of electricity through a heating component that creates heat. These features the optimal possible air movement with energy-efficiency consumption.

Finned Strip Enclosure Heaters
Finned Strip Enclosure Heaters

Finned Strip Enclosure Heaters from KDM specializes with mechanically attached fins that provide effective heating in many gas process applications.

NEma-Type Enclosure Heater
NEMA-Type Enclosure Heater

NEMA-Type Enclosure Heater is utilized in indoor or outdoor applications. These help to prevent corrosion to any device from gases, moisture, dust increase. Used in various applications such as in switchgear cabinets, pneumatic tube transport, etc.

Semi-conductor Enclosure Heater
Semi-conductor Enclosure Heater

Semi-conductor Enclosure Heater will satisfy numerous applications due to its high level of flexibility and greater thermal power control. Cost-effective heaters are offered in KDM.

Silicone Rubber Enclosure Heaters
Silicone Rubber Enclosure Heaters

Silicone Rubber Enclosure Heaters have come from fiberglass-reinforced silicone rubber. These offer in a broad variety of sizes and shapes. Plus, it can be bend with a curved work surface.

Related Products of Electrical Enclosure Heater

Our high-standard heaters range from 250 to 4500 wattage with combined thermal thermostats and fuses availability.
Surface Spot Heaters features compact design that offer various options in power capacity and voltage output.
Designed with corrosion-resistant electrical wiring components hardware. Made from quality materials that offers last-longer function.
Convection Heaters from KDM offers lightweight features with highest power functions. These are easy to fit heaters.

Send Your Inquiry on KDM Electrical Enclosure Heater Now.

  • Excellent Climate Control Provider
  • Comprehensive Engineered Products
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  • 10 years Of Expertise in Manufacturing

Electrical Enclosure Heater

KDM Electrical Enclosure Heater was also known as cabinet heaters or DIN Rail Heaters.

If you are sourcing for the most efficient and safest electrical enclosure heater, KDM Electrical Enclosure Heater has a lot to propose.

Worries no more! KDM offers a wide range of heaters at a very economical price.

KDM Electrical Enclosure Heater is very functional in protecting electronic, pneumatic, electric, mechanical, hydraulic devices and many more.

These help the devices to perform excellent by securing against corrosion, freezing or condensation and low temperatures.

Electrical Enclosure Heaters

Utilized to warm the equipment interior air and control the internal state of the instrument.

Here in KDM, experience the complete and innovative heaters with maintenance-free features that surely satisfy your needs.

As the leading manufacturer in China, KDM has the potential to manufacture Enclosure Heater in various dimensions, capacity, sizes, options, designs, explosion-proof capabilities, heat loads to make them the most ideal enclosure inclusion.

KDM has different types of KDM Electrical Enclosure Heater that passed the international standards, and become well-known in various industries.

We have tubular enclosure heaters, NEMA-type enclosure heater, ceramic enclosure heater, explosion-proof enclosure heaters and many more.

Electrical Enclosure Heaters

All of these assemble from high-quality materials, that’s why these perform longevity in service.

The choice is yours! You can send your specifications to us, and we will deliver the best service to your enclosure projects.

Our KDM Electrical Enclosure Heater provides the safest, finest performance due to its high-temperature safety protection.

Whether you are a distributor, supplier, or retailer, KDM is always a good choice!

No matter how complicated your production system, KDM has an enclosure heater that surely meets your needs.

We will provide a 100% flexible, and accessible electrical enclosure heater to help you grow your business.

KDM is so reliable in manufacturing and supplying you with the best and optimal finishes.

We obtained many certifications such as NEMA, UL, CE, RoHS confirmed certified.

To put it briefly, KDM is a specialist when it comes to your Electrical Enclosure Heater projects.

Whether it’s a window kit electrical enclosure, latches electrical enclosure, cable entry electrical enclosures or many more, KDM will always fulfill your needs.

Electrical Enclosure Heaters

Whenever you need a provider in your electrical enclosures, you can count for KDM.

We have a friendly team that provides 24/7 online assistance to support your necessities on enclosures.

Don’t hesitate to send right away your KDM Electrical Enclosure Heater inquiries.

Purchase to us now.

Electrical Enclosure Heater: The Ultimate FAQ Guide

What is an Enclosure Heater?

Enclosure heaters are devices designed to raise the temperature of electrical cabinets or enclosures to optimal levels.

Normally, the suitable temperature will depend on the types of mechanical, electronic, hydraulic, or pneumatic systems in the electrical enclosure.

By increasing the internal temperature, the electrical enclosure heater protects all components from:

  • Undesirable low temperature
  • Corrosion due to moisture
  • Condensation or moisture build-up

You can install electrical enclosure heaters depending on:

i. Heating capacity

ii. Enclosure heater mounting option

iii. Heater size

Enclosure heater

Enclosure heater – Photo credits: HOFFMAN

Why are Enclosure Heaters Important?

Some of the benefits of enclosure heaters include:

· Help Control Relative Humidity within the Electrical Enclosure

With electrical enclosure heaters, you can maintain 60% relative humidity within the electrical enclosure.

Enclosure heaters achieve this by removing moisture in the enclosure.

Therefore, you don’t have to worry about any instances of condensation.

· You Can Maintain Constant Temperature with the Electrical Enclosure

When properly integrated with enclosure cooling systems, the heater will maintain a constant temperature within the enclosure.

As a result, there will be no condensation within the enclosure.

Also, remember condensation forms when the temperature goes below the dew point.

· Prevents Corrosion of Electrical Enclosure Components

Moisture or water condensation is one of the key causes of corrosion.

Once you eliminate it by installing suitable enclosure heater, your components will be free from corrosion.

· Prevents Expensive Maintenance Cost & Optimizes Performance

Your electrical components and systems will operate optimally once you maintain the temperature of the electrical enclosure.

Remember, moisture, water, or condensation will cause damage to most electrical components.

In most cases, it causes premature failure, which will be costly.

Once you have full control of the internal environment of the electrical enclosure, you can optimize performance.

How Does Electrical Enclosure Heater Work?

The simplicity or complexity of the electrical enclosure heater working principle will depend on the design and model.

Let’s look at some of the most common options:

a) Working Principle of PTC Electrical Enclosure Heaters

Positive temperature coefficient (PTC) use special types of materials (rubber or ceramic).

When you apply voltage, it heats up due to resistivity.

As the process continues, resistivity increases and heat production reduces.

That is, the electrical resistance will reduce the current flow within the PTC element.

The process will continue until it reaches an equilibrium point.

In short, when the electrical enclosure is cold, the heating process will start.

However, as it warms, the PTC enclosure heater will start to limit the heating.

PTC Heater

PTC Heater Element – Photo Credits: GM Name Plate

b) Working Principle of Fan Heater for Electrical Enclosure

When you turn on the electricity, current flows through an electric element.

As the electric element heats up, the fan draws in air, passing air over the heating element.

The cold air heats up and is circulated within the electrical enclosure.

Fan heater for enclosure

Fan heater for enclosure

What is PTC Enclosure Heater?

Positive Temperature Coefficient (PTC) heaters are also called self-regulating heaters.

They use positive temperature coefficient materials such as:

  • PTC ceramic material with temperatures ranging from 140–250 °C
  • PTC rubber material with temperature ranging from 0–80 °C

Normally, you will choose the temperature range during the PTC enclosure heater manufacturing process.

They are suitable for open-loop enclosure heating since they don’t require:

  • Sophisticated system diagnostic controls
  • External feedback control systems
  • Overheat protection

They are popular for high efficiency, safety, and reliability than the traditional heaters.

There is no risk of overheating.

PTC enclosure heaters will begin to heat when the electrical enclosure is cold.

That is, when the electrical enclosure is cold, the electrical resistance of the PTC material will be low.

It will allow current to pass through, hence generating heat for the enclosure.

As the internal temperature of the enclosure increases, its electrical resistance increases, thereby restricting current flow.

Consequently, it will reduce the heat generated.

PTC Material

PTC Material – Photo credits: Circuits Today

This process will continue until it reaches an equilibrium point.

Most PTC enclosure heater can work within -40°C and 70°C.

In short, PTC enclosure heaters work as if they have their own sensors.

Why is Electrical Enclosure Wattage Important?

Through electrical enclosure wattage, you will know the following:

  • Size of the electrical enclosure
  • Amount of electrical power enclosures requires
  • The heating requirement for electrical enclosure
  • Capacity of electrical enclosure heater
  • Cost of heating electrical enclosure
  • Degree of electrical enclosure insulation

KDM Electrical enclosure

KDM Electrical enclosure

How Do You Select Electrical Enclosure Heater?

You should consider the following when selecting electrical enclosure heaters:

i. Know the environment where you want to install the electrical enclosure

ii. Electrical enclosure insulation

iii. Heat load in the electrical enclosure

iv. Heat dissipation in the electrical enclosure

v. Types of components in the electrical enclosure

vi. Heating principle of the enclosure heater, i.e. PTC heaters, radiant heaters, fan heaters, etc.

vii. Cost of heating enclosure

viii. The efficiency of the heating system

ix. Size of an electrical enclosure

Are There Benefits of Electrical Enclosure Heater with Thermostat?

A thermostat in electrical enclosure heaters works as control mechanisms.

Ideally, a thermostat acts as a switch that turns ON/OFF depending on the set temperature.

You can use the thermostat in electrical enclosures to prevent overheating.

That is, by setting the maximum temperature of the enclosure, it will automatically switch off the enclosure heater.

Interface of a thermostat

Interface of a thermostat

Furthermore, you may also integrate it with enclosure cooling systems.

That way, it may also turn on the cooling system to maintain the enclosure temperature.

Alternatively, you may also set a minimum temperature for the thermostat.

At that temperature, the thermostat will switch on the enclosure heaters.

What is Anti-condensation Heater?

Anti-condensation heaters are specially designed to maintain the internal temperature of electrical enclosures.

They prevent possible fluctuations of temperature that leads to condensation.

You can strategically install anti-condensation heaters to eliminate water vapor and provide frost protection.

Anti condensation heater

Anti-condensation heater – Photo credits: VITAR

Mostly, the anti-condensation heater will maintain enclosure temperature above the dew point and the ambient temperature around the enclosure.

How Do You Calculate Enclosure Heater kW?

Heaters are rated in watts or kilowatts.

Watt is simply a unit of power and 1kW is equivalent to 1000 watts.

The formula for calculating power in watts is

Power (Watts) = Volts x Current

What is Electrical Cabinet Unit Heater?

Electrical cabinet unit heaters are designed for an independent heating area.

Depending on the design, electrical cabinet unit heaters may have fans that blow heat within a specific area of the enclosure.

Besides, they may have additional features such as thermostatic control and optional controls for the heating system

How Do You Determine Heat Transfer in Electrical Enclosures?

Heat transfer in an electrical enclosure will depend on many factors, such as:

  • The area where you intend to install the electrical enclosure
  • Nature and types of components in the electrical enclosure
  • Size of the electrical enclosure
  • Insulation of electrical enclosure
  • Area of the electrical enclosure exposed to the environment

Now, the process of heat transfer in an electrical enclosure can be due to:

  1. Convection and conduction
  2. Forced convection
  3. Radiation

Of course, all these will depend on whether you want to transfer heat into or from the electrical enclosure.

Once you take into account all these, then you can determine the heat transfer in electrical enclosures.

Of course, it will also be easier to size electrical enclosure heater.

What is Thermal Management in Electrical Enclosure?

Thermal management in an electrical enclosure is the process of maintaining a suitable working temperature for optimal performance of enclosure and its components.

Thermal management

Thermal management – Photo credits: Global Spec

You can use cooling systems such as enclosure air conditioner, enclosure fans, or ventilation systems to lower temperature.

On the other hand, you can use a fan heater, PTC heater, unit heater, or radiant enclosure heater to heat the enclosure.

Whichever route you take for thermal management in electrical enclosures, it must be:

  • Cost-effective
  • Efficient
  • Reliable
  • Predictable and guarantee consistent performance

What is Internal Electrical Enclosure Heat Load?

It is the total (maximum) heat every component in an electrical enclosure dissipates.

You should monitor the internal heat load of an electrical enclosure to prevent fire outbreak, component failure, and damage.

Where should you Install Explosion Proof Enclosure Heater?

Explosion-proof enclosure heaters are best for hazardous environments where you have combustible products such as liquids, gases, or solvents.

Most explosion-proof enclosure heaters are more expensive; hence, they may not be economical for non-hazardous environments.

Explosion proof panel heater

Explosion-proof panel heater – Photo credits: Thermon

How Much Power Does Enclosure Heater Use?

Depending on the temperature rise in an electrical enclosure, it may use a few watts (say about 30w) to kilowatts.

Power consumption will depend on the:

  • Capacity of the electrical enclosure heater
  • Ambient temperature and environment
  • Enclosure insulation requirements
  • Operation time of the electrical enclosure heater

Always check the information on the nameplate (or manual) of the heater to know the power consumption.

Heater information

Heater information

What are the Benefits of Radiant Enclosure Heater?

  • Come with or without thermostat control
  • Easy to install and maintain
  • Provides freeze and condensation protection for enclosure components
  • Does not distribute dirt particle in the enclosure like forced air heating
  • Ensures optimal heat transmission

Can You Recommend Best Enclosure Heating Element?

The enclosure heating element will depend on the heating requirements.

These will include insulation of the enclosure, size of enclosure, environment, and type of components in the enclosure amongst others.

Depending on the enclosure heating requirements, you can choose:

  • PTC enclosure heaters
  • Radiant enclosure heaters
  • Ceramic heater
  • Fan heaters
  • Finned strip heaters
  • Tubular heaters

Enclosure heating system

Enclosure heating system

What is Finned Strip Enclosure Heaters?

Finned strip heater

Finned strip heater – Photo credits: Tempco

Finned strip heaters have distinct thin fins, on the main or single road for fast and efficient heat dissipation.

In most cases, these fins are attached to a conductive metal bar.

They have a heating element, a protective sleeve, and a mounting mechanism.

In most cases, you can use finned strip heaters as radiant heaters.

Should You Install Strip or Ceramic Enclosure Heater?

Both strip heaters and ceramic enclosure heaters can prevent condensation and freeze in the electrical cabinets.

However, if you want to heat larger spaces and force convection, then you should go for ceramic enclosure heaters.

For small spaces where you may require radiant heating, a strip enclosure heater will be a perfect choice.

How Do YouSize Cabinet Enclosure Heater?

Step 1: Calculate the size of an electrical enclosure.

You should consider length, width, and depth.

Sizes of electrical enclosure

Sizes of an electrical enclosure

Let’s say the total area is “A.”

Step 2: Know the enclosure material. Electrical enclosures are made from stainless steel, galvanized steel, polycarbonate, aluminum or painted steel.

You need to know the heat transmission coefficient of the material.

For instance, the heat transmission coefficient of stainless steel is 0.344 W/(ft2•K), while that of aluminum is 1.115 W/(ft2•K) .

Let’s have the heat transmission coefficient of the enclosure as “k.”

Step 3: Calculate the temperature differential in Kelvin.  You can calculate the change in temperature (ΔT) using the following formula:

Step 4:  Calculate the heating power of the electrical enclosure, which is basically the total internal heat load of the enclosure. You can denote this as “Pv.”

Now, the enclosure heater size you will need is calculated by:

For an enclosure located indoors:


For enclosure located outdoors:


Of course, all the values will be in watts.

As you can see, from this process, you can also calculate or measure heat dissipation in electrical enclosures.

And of course, from this calculation of heat dissipation from electrical enclosures, you can determine an enclosure cooling system.

What is Tubular Enclosure Heater?

Tibular heater

Tubular heater – Photo credits: Machine Design

Tubular enclosure heaters take the shape of a tube.

They are all-purpose enclosure heaters you can use to protect components from condensate and freezing.

Why Do You Need Anti-condensation Heater with Thermostat?

The thermostat in anti-condensate heaters acts as an OFF/ON switch.

It will switch on and switch off the anti-condensation heater, thereby preventing possible overheating.

What is Silicon Rubber Enclosure Heaters?

These are special types of heaters made of silicon and wire wound on the surface.

Silicon rubber enclosure heater provides versatile heating capability and protection from humidity, freezing, and condensation.

They mostly come in wire-wound designs, with either mounted or in-built thermostat.

They can work in both indoor electrical enclosure and outdoor electrical enclosures.

Also, you can consider silicon rubber enclosure heaters for hazardous environment.

Can You Use Heater in NEMA Enclosures?


However, before you choose an enclosure heater, you should know the specifications of each NEMA rating for an enclosure.

Can You Recommend Instrument Enclosure Heater?

To choose a suitable instrument enclosure heater, consider the following:

  • Size of instrument enclosure
  • Type of instruments in the enclosure
  • The heating requirement for the instrument enclosure
  • An ambient temperature of the surrounding environment (factor in all possible fluctuations)

With these considerations, you can choose PTC, finned strip, ceramic, radiant, or fan heaters.

Are Fan Heaters Safe for Electrical Enclosures?


However, you should choose fan heaters with overheating protection.

This can be in the form of a thermostat.

Also, you should position the fan heater properly to prevent possible hot spots in the enclosure.

Which Kinds of Heaters Can You Find in KDM Enclosures?

At KDM, we offer both standard and custom made enclosure heaters.

Depending on your heating requirements, you can get:

  • Silicon rubber enclosures
  • Finned strip heaters
  • Ceramic heaters
  • Fan heaters
  • PTC enclosure heaters
  • Fan heaters
  • Radiant heaters and many more.

You can talk to us today for more information about KDM enclosure heater.

Does KDM Offer Electrical Enclosure Heater Replacement?


We offer a range of electrical enclosure heater replacement.

Even if you bought electrical enclosures from other manufacturers, KDM could still replace it for you.

Also, our technicians will help you calculate enclosure heat load and heater capacity.

Can KDM Fit Enclosure Heaters and Cooling Systems in One Electrical Cabinet?


Depending on the electrical enclosure standard, we can install any type of heating system.

Besides, you can get enclosure air conditioners, enclosure fans or enclosure heat exchanger systems.

How Does KDM Control Electrical Enclosure Quality?

All our electrical enclosure are CE, RoHS, CCC, CSA, and UL compliant.

We also source our components from reputable brands for those we cannot produce in-house.

Our quality control team inspect all electrical enclosures before and after assembly.

If you want quality testing and compliance certificate, KDM will also provide.

What Standard Enclosure Heaters Does KDM Offer?

KDM has are CE, RoHS, CCC, CSA, and UL compliant heaters.

They come in different sizes, designs, and heating capacities depending on specific requirements.

Can KDM Customize Enclosure Heater for Hazardous Environments?


KDM has explosion-proof electrical enclosures for hazardous environments. They come in different power rating and special material to protect the heater from an external environment.

Does KDM Offer 12v Enclosure Heater?

Yes, we have 12v enclosure heaters for different heating requirements.

We also have different capacities of electrical enclosure heaters. For more information, contact our engineers today.

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