Air purifiers are needed now a day not only in homes but also in offices. They are necessary as the air inside our homes and workplaces is unhealthier than the air outside. This is because the household cleaners which we use are based on chemicals and release potentially toxic and dangerous chemicals into the air. Even if these cleaners are not being used in the house regularly, their very presence in the house is enough to contaminate the air with their toxic fumes. Since 
houses are sealed well against the harsh weather, these fumes stay inside and continue to affect air quality over time.  Also, by enforcing strict emission regulations, the government has managed to keep a check on outdoor pollution. But, inside houses and buildings, the air is not subject to strict air quality checks and continues to be more toxic than the air outside.

When purchasing an air purifier, make sure that you get the best deal. You should know which Fresh Air repair will do its job in the best possible way. Keep these things in mind while shopping for one:

• It should control the level of gases and any smell emitted by them.
• It should control dust, pet dander, pollen and fumes which can easily cause respiratory allergy.
• It should control bacteria and air borne mold spores.
  People mistakenly expect Air purifiers repair to get rid of mold completely. But this is not so. It can only reduce the mold spores which are present in the air. They are the main cause of respiratory allergies so, if they can be checked, the chance of people catching allergies is reduced greatly.
  To remove mold, it has to be physically wiped off and a dehumidifier may have to be used.
  Any air purifier manufacturer who claims that his product will eliminate mold is probably making tall claims and you should be careful while buying their products.
• You should know the exact area which needs to be purified using air purifiers. This should give you an idea of how many units you need to buy and the expected cost.
• You should inquire what kinds of filters are being used in the air purifiers and how often they need to be changed. This will tell you of the level of efficiency which you can expect from the air purifier. As the filter starts to accumulate dirt, the efficiency of the air purifier is affected negatively. So, it is important to monitor the status of the filters regularly to get the maximum benefits from the device.
• You should inquire how much electricity it will consume and also the cost of the filters if they need to be replaced. This will have to be factored into the cost of the air purifier.
• The arrangements required for its installation should be clear to you. Some air purifiers are attached to the furnace and some are of the movable variety and can be hooked up in any room as per requirement. 

It is important to verify if the air purifier which you are considering buying emits any 
ecologically harmful gases like ozone and if the levels of emission of these gases are within 
the permissible limits.