You can find a new furnace filter at any major home improvement store. looking online is your best option for starters because they sell the cheapest but not the best quality.
Filters-Now.com is a great website to find all furnace needs. There is a special section for humidifier filters. And they have delivery available within 24 hours.
Provided your furnace has a humidifier on it, you may replace the filter. I would recommend going to a local home improvement store to find the model that will fit your furnace. If you do not currently have a humidifier on your furnace I would recommend contacting a local furnace supply company to enquire about a new furnace or upgrade.
There are several places one can find replacements for 3M furnace filters. One can try local home department stores such as Home Depot or order online from Amazon or eBay.
The previous answer was Gibberish. Still needs a new answer.
Yes they can. Furnace filters help to divert dust and keep your furnace and air conditioning coil clean. As long as it doesn't break, a furnace filter can be reused.
Inexpensive furnace filters can be found at most mass retailers, such as Wal-Mart, Target, Home Depot, and such. If you perfer not to drive, you can find them rather inexpensive online at Amazon and Ebay.
Furnace filters control the amount of particles that pass out of the furnace and into the house. They are essentially the first line of defence in keeping the air in your home clean.
To properly install furnace filters in your home heating system, follow these steps: Turn off the furnace. Locate the filter slot on the furnace. Remove the old filter. Insert the new filter with the airflow arrow pointing towards the furnace. Close the filter slot. Turn on the furnace and check for proper installation.
That will depend entirely upon the type of furnace you have. There are filter less furnaces, so if you have one, you won't need filters. Otherwise, if your furnace requires a filter, you will need to purchase filters and replace them regularly. If you have the owners manual, that will tell you if the furnace needs a filter.
Many different warehouse stores such as Sam's Club and Costco sell these filters in bulk. You can find out more by going to their websites.
Home Depot sells hepa furnace filters online. Have the correct size of filter needed and look for promotional codes for free shipping. If Home Depot does not have what you're looking for, try Sears.com.
Furnace humidifier filters should be changed at least every three months so they work efficiently. If not changed they trap dust and particles that can 'pollute' the air you breathe. http://yourfilters.com/