When did R22 start being used?

In this blog, we’ll use the name R22. This refrigerant was introduced in the 1950s and became the leading AC refrigerant in the residential heating and cooling industry.

What year did they change from R22 to r410a?

2010
Out with R-22, In with R-410A By January 1, 2010, there was a ban on the production and import of R-22. As a result, manufacturers of heat pump and air conditioning equipment redesigned their systems to accommodate R-410A, a chlorine-free refrigerant compared to R-22.

When did R22 stop being used?

R-22 is a refrigerant that is often used in air- conditioning equipment. Because R-22 depletes the ozone layer, production and import was further limited in 2010. In 2020, R-22 will no longer be produced or imported. After 2020, only recovered, recycled, or reclaimed supplies of R-22 will be available.

Who invented R-22 refrigerant?

R-22 is an HCFC refrigerant and can harm the Ozone layer. It was originally invented by a partnership with General Motors and the DuPont company all the way back in the 1930’s. These new CFC and HCFC refrigerants were known under the DuPont brand name Freon.

How was Freon discovered?

In 1930, Thomas Midgley held a demonstration of the physical properties of Freon for the American Chemical Society by inhaling a lung-full of the new wonder gas and breathing it out onto a candle flame, which was extinguished, thus showing the gas’s non-toxicity and non-flammable properties.

How bad is R22 for the environment?

Over the years, the Environmental Protection Agency (EPA) found that R22 is depleting the ozone layer and is a harmful agent for the environment. The phase out of R22 production and imports started in 2003. The stock of this chemical continues to deplete rapidly, also leading to substantial increase in its prices.

What gas is replacing R22?

R-407c
The best replacement for R-22 Freon is usually R-407c. It has a very low loss in capacity (0 – 5%) relative to R-22 and is less expensive than many other R-22 replacement refrigerants. If a system has R22 in it already you cannot use a replacement refrigerant to simply add to the R22.

How many pounds of refrigerant are in a 3-ton unit?

12 pounds
The amount of cooling for your system can be estimated in the range of 2 to 4 pounds per ton. The 3-ton AC or Heat Pump with a 35 foot lineset will need a total of about 12 pounds of refrigerant. The lineset, coil and unit are included.

How much R22 is in a 3-ton unit?

The General Rule of Thumb When estimating the amount of refrigerant in a residential A/C unit, the general rule that is used is in the 2-4 pounds per ton of cooling. Say, for instance, recharging a 3-ton A/C with a 35-foot line set from empty level will need an approximately 6-12 pounds of refrigerants.

What came before R22?

410A (also known as Puron) replaced R-22 to become the main refrigerant used in new air conditioners. However, existing systems that used R-22 could still be serviced, despite the increasing cost to refill them.