Why is it so difficult to make an air purifier that is also a radiator in winter?

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This is a convergence that has not happened at the expected rate. The air purifier, a necessity in our homes. The good old radiator is essential during the winter months. The two have largely remained as separate devices. You will need both in your home. Unless you are thinking of the Dyson range of air purifiers which offer a built-in heater or more recently a new air purifier from Philips which also allows the air in the room to be heated.

British tech company Dyson now sells the third generation of air purifiers in India which also have the option of heating. The first was the Dyson Pure Hot + Cool (it was the HP04 model), followed by the Dyson Pure Hot + Cool Cryptomic, and now the latest generation, the Dyson Purifier Hot + Cool.

Philips has only caught up now, with the launch this week of the Philips 2000 Series 3-in-1 Purifier (it’s the one with model number AMF220 / 35). In a way, it adopts a lot of Dyson’s methods as well – bladeless design and 350 degree oscillation.

The anatomy of an air purifier

If you’ve ever taken a peek inside an air purifier, this is one of the simplest devices at play in your home. There is a large fan, which looks a lot like the fan and runs in your split air conditioner (albeit a different size), which sucks air through the filter layers on one side and then pushes that air out. vents (usually near the top). Adding a heating element here would be a rough implementation.

Gulbahar Taurani, Managing Director of Philips Domestic Appliances for India, says the new Philips purifier with heating option is primarily aimed at the buying population who understand the “health benefits of using air purifiers at home. the house, throughout the year, accompanied by the option of choosing heating and ventilation options ”.

One of the many issues with typical box type air purifiers would be how to channel hot air outward for steering and range. Unlike Dyson and Philips’ approach with fanless designs and vents that push air rather than being a rippled, inconsistent dispersion, box air purifiers and their large vents will heat the area immediately but not further into the room.

Second, there will be residual hot air left in the bowels of air purifiers designed in the most common form factors. Dyson and Philips effectively seal the filter to the air vents, and no hot air remains inside (potentially damaging components and otherwise wasted energy), which is not possible with other purifiers.

Heating technology and implementation

This is where positive temperature coefficient (PTC) heaters come in. This is the method used by Dyson and Philips. The advantage of this technology is twofold. They reach the target room temperature much faster than metal coils or convection heaters. Once that’s checked, turn off quickly for more efficient operation.

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Integrating Dyson’s heating technology into the three generations of air purifiers is straightforward. Ceramic plates designed to be taller (vertical focus, given the ring loop design) and placed in the loop, in the path of each of the air vents.

Note that Dyson purifiers also have a diffuse, clean vent, but the heat function does not work there. These plates heat up and as the air comes out of the loop and enters your room, it touches them and creates a warm, comfortable air stream during winters.

But do you wonder how the body of the purifier and radiator does not heat up? this is because between the plates and the body panels (thermoplastic in most cases) there is a space which is filled with cool air which acts as a buffer. These ceramic plates can heat up to 180 degrees, which is just below the dust burning point.

How much energy does it consume?

Philips says the ceramic plates heat the air (at least in the immediate vicinity of the purifier) ​​in three seconds. In fact, the Philips 2000 Series 3-in-1 Purifier has three heating modes: 1250 watts, 1500 watts and 2200 watts, depending on the room temperature.

Unlike Dyson’s method of allowing you to set a target room temperature, Philips instead gives you these heating modes and fan speed settings (three speeds, while you’re at it). The maximum power consumption of the Dyson is 1,575 watts, depending on the required ambient temperature you set it to.

The cost of convergence

How much does this convergence of air purification and space heating cost? There is always a bonus attached to Dyson air purifiers; the quality of the filters and the bladeless design (it’s great for kids, mind you), and the heater range is no different.

Currently the Hot + Cool Purifier sells for around ??50 310 while the Pure Hot + Cool Cryptomic has a price of around ??44 965. In comparison, the Philips AMF220 / 35 will win ??29,695 from your wallet for a purifier that doubles as a radiator. Notice that it is also comparatively smaller in size.


  • ABOUT THE AUTHOR

    Vishal Mathur is a technology writer for Hindustan Times. When he doesn’t make sense of technology, he often seeks elusive analog space in a digital world.
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