Air conditioning is on the rise, but it is often questioned for its impact on our health and on the environment.

Is it dangerous and should we be wary of it? Here is the answer!

Pollution and Air Conditioning

Air Conditioning and Greenhouse Gases

An air conditioner can release refrigerants which are responsible for the increase in greenhouse gases:

– Indeed, these fluids have a high warming power evaluated by the GWP (Global Warming Potential);

– In order to avoid refrigerant emissions into the air, it is important to carry out proper installation and regular leakage checks. In itself, an air conditioning circuit is closed, therefore no emissions.

– Air-conditioning creates a vicious circle, known as the urban heat island, which is found in large cities :

◦ The higher the temperatures rise, the more air conditioning is used;

◦ But the more it is used, the more heat is released into the air with air/air conditioning systems.

◦ To remedy this, large cities use centralized air-conditioning systems that reject heat to water loops.

Air conditioners use a lot of electricity:

– Your bill can increase by 20 to 25% for a 45 m² surface area during the summer period;

– During the 2003 heatwave, peaks in electricity consumption were a real concern, when only 10% of households had them.

– The peaks in electricity consumption that we find in winter during cold waves are now also found in summer during heat peaks.

Banning CFC and HCFC Refrigerants

CFCs (chlorofluorocarbons) and HCFCs (hydrochlorofluorocarbons) have been very popular in the refrigeration industry, particularly as refrigerants and in air conditioning systems for their properties:

– They are non-flammable;

– They have a good resistance capacity;

– They don’t degrade;

– They don’t damage installations;

– They are easy to liquefy.

On the other hand, these two types of fluid contained chlorine, responsible for the hole in the ozone layer. So they were all gradually banned by the Montreal Protocol.

New Refrigerant Gases for Air Conditioning

Manufacturers are now environmentally conscious and are helping to reduce waste and the environmental impact of air conditioners by using new refrigerant gases:

– The refrigerant R 410 A (HFC):

◦ It reduces the impact on the ozone layer to zero;

◦ Some air conditioning systems reduce their power consumption for equivalent performance;

◦ Its action on the greenhouse effect is 2088 times greater than CO2. Fluids in its category (HFCs) are in the process of being banned in the near future. For the time being, they are subject to a quota system limiting their use.

– Refrigerant mixtures:

◦ To cope with HFC restrictions, manufacturers are mixing fluids to reduce their impact on global warming;

◦ In air conditioning, the fluid currently used is R32, which has a greenhouse effect 3 times lower than R410A but more than 600 times higher than CO2.

– The new HFO (hydro-fluoro olefin) type refrigerants:

◦ They have no impact on the ozone layer and have a low greenhouse effect;

◦ They have a performance equivalent to previous fluids;

◦ They are slightly flammable.

– Hydrocarbons:

◦ They are said to be natural;

◦ They have no impact on the ozone layer and have a low greenhouse effect;

◦ They are already present in domestic and professional refrigerators;

◦ They are flammable.

– Ammonia (NH-3 or R-17):

◦ It is said to be natural;

◦ It is an excellent refrigerant;

◦ However, it is toxic and flammable;

◦ Despite this, it remains in the industrial environment;

◦ It has no impact on the ozone layer or the greenhouse effect;

– Carbon dioxide (CO2):

◦ It is said to be natural;

◦ It is neither toxic nor flammable;

◦ It has no impact on the ozone layer and a low greenhouse effect;

◦ It has a high usage pressure;

◦ Its use involves special air conditioning compressors, but it is of increasing interest for heat pumps, industry and food processing.

Environmentally Friendly Air Conditioning

For peace of mind about the environment, there are totally environmentally friendly air conditioning systems available.

There are two main ones:

– Solar air conditioning

Solar air conditioning uses the principle of sorption. A natural refrigerant (often ammonia) is mixed with water to absorb heat and release it. This system works without a compressor, there is only electricity consumption for two circulators (very low consumption). The compression is called thermal instead of mechanical and is done through solar panels.

– Bio air conditioning also called evaporative air cooler (EAC)

Evaporation of water is a natural way of cooling, identical to perspiration for humans. Water on the skin evaporates by absorbing body heat. This same principle is used by bio air conditioning. Water is injected into a media, a fan creates a flow of air that passes through the media to become charged with moisture, cooling the air that is injected into the room.

If you are an ecologically conscious person and looking forward to reducing the impact of Air Conditioning on the Environment, we can put you in touch with air conditioning professionals to get a personalized quote. Remember to drop down your comments in the section below.