Types of Room Heater- Complete Buying Guide

A good way to understand the types of room heater is to understand the methodology of heat transfer, first. As we learned back in our school days, there are three ways heat can be transferred from one body to another. These are called modes of heat transfer, and they are Conduction, Convection and Radiation. Out of these three room heater types found in the Indian markets makes use of either the Convection mode of heat transfer or the Radiation mode.

types of room heater

So on a broad level, we can say, there are only two types of room heaters.

Two Major Types of Room Heater

1) Convection Room heater

The convection room heaters work on the principle of heating the air and circulating it,. As we know hot molecules are lighter in weight and they rise up, whereas the cold air molecules being heavier in weight settle down to come in direct contact with the heater, and hence get heated.

Example: We usually find the Air Conditions installed at an upper level on the wall. This is because ACs extract heat from the air molecules, making them cold and heavier than the hot air molecules in the room. Thus it circulates the air in the room, extracting heat from all air molecules in the room and making the room cool.

Explore Popular Convection Heaters

2) Radiation Room heater

The radiation type of room heater heats a cold object by directly directing light rays on it. 

Example: The heat we receive directly from the sun’s rays.

I guess you may be thinking; “then what are those plenties of room heaters available in the markets with so many different names, including the oil-filled room heater that has often been referred to as the third type of room heater at many places.” Please be informed that oil-filled room heaters, too, transfer the heat on the principle of convection mode of heat transfer. 

Now let us move ahead and discuss how these two technologies in room heaters come with multiple combinations of heating elements. We will quote the popular sub-types of convection and radiation room heaters, and explain their properties followed by some best-selling room heaters in the Indian market of that particular type.

Explore Popular Radiant Heaters

Types of room heaters (Convection based)

Fan Heaters (Air Blower)

Fan heaters are a forced way of heating cold air and recirculating it. It consists of a heating element which generates heat electrically. This heat is then transferred to the room environment through a fan.

Best Selling Fan Heaters

Orpat OEH-1220 2000-Watt Fan Heater (White)

Usha Heat Convector 423 N 2000-Watt Room Heater with Over Heat Protection & ISI Mark

Oil-filled radiators (OFR)

Oil-filled radiators are the most efficient and safest for human health among the many types of heaters we see in the market. They work on the principle of convection mode of heat transfer that involves heating the space from the hot hydraulic oil they consist of. The oil used in the oil filled radiator is a highly refined mineral oil called Diathermic oil. 

These oils have a high specific heat and a high boiling temperature. A Positive Temperature Coefficient (PTC) heating element is commonly used in oil-filled heaters, which provides uniform and high heating. The oil because of its high boiling point does not boil and stays in the liquid form only even oh high heating.

The oil-filled radiators are costly heaters as they employ high-grade oil, a PTC heating element, and an expensive body panel.

They are also known as Column heaters. The vertical cavities that emit the heat are known as Fins. The more the number of fins, the more will be the heat dissipating capacity. Hence when buying Oil-filled heaters, it is suggested that choose the number of fins that can emit sufficient heat to heat the size of your room. 

For example, a 15-finned Oil filled heater can heat a room of 200 to 250 square feet efficiently. This was just an example, please make a self-check with the seller before buying an oil-filled heater.

Best Selling Oil Filled Radiators

Havells OFR – 13Fin 2900-Watt PTC Fan Heater (Black)

Bajaj OFR Room Heater, 9 Fin 2000 Watts Oil Filled Room Heater 

Types of room heater (Radiation based)

All Radiation heaters/ Infrared heaters work on the same principle, only the difference lies in the heating elements used. As we know different elements have different properties so the speed at which they heat the space also differs. Let us see how they differ to one another.

Quartz heaters

The quartz heating element looks similar to the halogen heating element, but there is some structural difference, and hence properties difference also. It takes more time to heat the room/ space in comparison to the halogen heater. But they are cheaper than the halogen heater.

Best Selling Quartz Heaters

USHA Quartz Room Heater with Overheating Protection ( 800 Watts)

Singer Maxiwarm Super Quartz Room Heater 800 Watts

 Halogen heaters

Halogens are non-metallic elements placed in Group 17 of the periodic table. They are six in number: fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (At), and Tennessee (Ts). Out of these six, Fluorine and Chlorine exist in gaseous form at room temperature, and they are used in tubes as a heating element in Halogen heaters. They heat the room faster than the quartz heating elements but at the same time, they are costlier too than the quartz heaters.

Best Selling Halogen Heaters

Maharaja Whiteline Lava Neo 1200-Watts Halogen Heater

Bajaj Deluxe 2000 Watts Halogen Room Heater (Steel, ISI Approved)

Carbon Element heaters

Thin carbon flat plates are used as the heating element in the carbon element heaters. On passing electricity, this carbon plate emits heat in the form of infrared rays with a frequency invisible to human eyes. One benefit of carbon element heaters is the uniformness in the heat spread over space. 

Best Selling Carbon Element Heaters

Maharaja Whiteline Nano Carbon Neo, 500 Watts Room Heater

Maharaja Whiteline Lava Carbon Neo, 1200 Watts Room Heater

PTC/ Ceramic room heaters

You might not be much familiar with the word “PTC”, but I am sure you must be aware of “Ceramics.” Ceramic heating elements are very popular and are used in multiple home appliances like washing machine heaters, water heaters, etc. In fact, PTC( positive temperature coefficient) are ceramic materials only that have a positive temperature coefficient. In this material, the resistance of the material rises with a rise in current, and hence they offer consistent and constant heat. They are designed to reach a temperature limit and hence are also called “Self-regulating heaters”.

PTC heaters usually need a fan blower to distribute the heat to the environment/ room, and thus they are a type of CONVECTION heater, and the FAN heaters that we discussed under the Convection heater type usually have a ceramic heating element. Since we are discussing the heating elements-based named heaters, we have mentioned the PTC heater here.

Best Selling PTC/ Ceramic Heaters

Bajaj Majesty RX11 2000 Watts Heat Convector Room Heater

Bajaj Blow Hot 2000 Watts Fan Heater 

So these were the major types of room heaters available in the Indian market. But are they all?

 The answer is “No”.

Room Heater Types (Based on Fuel Use)

There are more room heater types available in the markets that are named based on the energy they use to produce heat. In other words, based on the fuels, heaters can further be classified into the following categories:

  • Electric Heater( Whatever we discussed above were the electric heaters)
  • Kerosene room heaters
  • Natural Gas space heaters
  • Propane space heaters, and others.

One another way (not type) to shop for different types of room heaters is by following the major brands in the segment of room heaters.

Top Room Heater Brands

Some popular room heater brands/ companies are listed below for your quick navigation and checkouts.






Since now we are done with the major types of room heaters, let us move forwards and learn some important FAQs related to the types of room heaters. These FAQs will majorly answer questions related to the health hazards of using a room heater, in general, and tips to overcome those disadvantages of room heaters.

Some Important FAQs related to room heaters

Are room heaters bad for health?

If not used properly, most room heaters can have bad health effects. But at the same time, continuous research has made invented heaters that are absolutely safe for human health.

How do room heaters affect human health?

We respire in oxygen, even when we sleep in a closed room, our room contains moisture and thus oxygen. we use this oxygen to respire while sleeping. But continuous use of a room heater may silently burn the moisture layers in a closed room, and we may feel suffocation leading to serious illness or even fatality. Such a situation can be dangerous for kids or people having respiratory issues. Thus our room must have access to fresh air when using a heater. Also, it is advisable to use a room heater in low-temperature settings.

Let us see how the different types of room heaters affect oxygen availability in a closed room.

  • Gas heaters: Gas heaters may release harmful gases. So, the room needs to be properly ventilated. It is recommended to follow the manufacturer’s guidelines for installation and use.
  • Electric heaters: These heaters may dry out the room of the available moisture and may produce ozone. Hence oxygen level must be maintained in the room and the electric room heater is used at a lower heat-dissipating setting.
  • Fan heaters: Besides affecting the moisture level in the room, fan heaters are also required to keep in a clean and dust-free area. They may blow dust and other particles into the air which is again harmful to people suffering from respiratory disorders.

Which one of the types of room heater doesn’t have a bad health effect?

Given that all types of room heaters have the potential to produce some amount of discomfort or irritability if they are not utilised appropriately, it is difficult to conclude that any type of room heater is absolutely free from any harmful health impacts. However, some types of room heaters might be less likely to be harmful to your health than others. For instance:

  • Convection heaters: The convection heater heats the room by circulating air, they do not produce any harmful gas. If used with the right ventilation, these heaters are less likely to cause bad health effects.
  • Oil-filled heaters: These heaters use heated oil as the medium of dissipating heat, and the manufacturers claim it causes zero oxygen depletion. It can be a very health-friendly heater for all age people.
  • Radiant heaters: This type of room heater uses various types of heating elements and they heat the place where they fall directly. 

As a result, they do not produce any harmful gas, and if used in the right manner, these heaters are not likely to cause bad health effects.

Which type of room heater is the best for use?

The best heater for a specific person or area will depend on a number of factors, including the size of the room, the layout of the house, the individual’s heating preferences, and their budget. If we assume that only the health effects of a heater is the primary concern, we suggest bringing an oil-filled heater after analysing the required size and feature availability in the heater.

Which heater should I buy? (How to choose a room heater)

Many factors decide the type of room heater that you should buy. Still, on a broad level, below are some features that your room heater must come with:

  1. Option to scale up or lower the heating (Temperature setting)
  2. Auto cut feature (Safety feature)

Further based on your room size or the duration of use, you can choose a room heater as guided below: 

  • Size of room: Convection heaters, ceramic heaters, or fan heaters could be an excellent fit for small to medium-sized rooms. These heaters can be efficient at heating a small room and are typically affordable. For larger rooms: Oil-filled heaters, infrared heaters, or radiators can be an excellent option for a large size room. These heaters may cost more to buy and run, but they may heat a space more quickly and effectively.
  • Portability: Though all heaters can be shifted from one place to another, if you need quick heating and that too for a shorter time-  we recommend going with  Fan heaters or portable convection heaters. These heaters are often inexpensive to buy and operate, and they may be readily transported from one area to another.


Though there are only two major types of room heaters, we saw that the heating element used and the feature they come with further classify these two types of heaters into various sub-types.

Hence it is important to first decide whether you need a Convection heater or a radiation heater followed by making a selection on the basis of the heating element and other features of the room heaters.

Hope we helped you in understanding the different room heater types, and you liked this report. If so, please share this report with your loved ones. If you wish to know something more, you may please write us at info@homewatercog.com

Thank You.

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