Bigger units like multi floored offices, shopping malls; theatres prefer to have central air conditioners which work better with respect to price and maintenance as well. They give an equal flow of air and the exhaust is usually outside so that the same air is not circulated within the offices that could end up in spreading of viruses and so on. Fans- impossible to be replaced! Well, there are still certain classes of society who cannot afford an air conditioner or the weather does not require an air conditioner to be present. Those people still manage to live with the fans. Fans could again be of many kinds like the ceiling fans which are the most popular type of fans and the other is the wall mount fans which are portable and could be wall mount. There are always these huge fans that are used in auditoriums in schools and colleges when there is huge audience.

One should not forget that even if you have an Air conditioner at home you would still require a fan in the same room as well as the other rooms that don't have an AC fitted. Water heaters Having spoken about cold weathers one other thing that we should never forget is the water heaters. In extremely cold climates it is impossible to even wash your face with such cold water coming out of the tap. Instant water heaters are now available which are also known as tank less water heaters. These are stand alone devices that can give water heated for domestic use. This water cannot be used for surgical purposes. Here the moving water is constantly heated and is not stored and hence the name tank less water heaters.

If you are in a place where there are extreme climates, you will require space heaters to heat the rooms during extreme winters. Space heaters also come with adjustable thermostats that could be used to blow hot air inside the rooms.