This is not formally a filter, but its operation will affect your air quality, and it may have a screen or a sponge that can get clogged.   Check the manual to see how it operates.    Many older furnace mounted humidifiers have been neglected or abandoned.   See if yours works; call a heating specialist to service it if you are not sure.   Winters in Toronto can be pretty dry and it is best if you can keep the humidity level in your home between 35 – 50%.
Washing your K&N washable air filter is as simple as removing your filter from its housing, spraying on K&N home air filter cleaner (part no. 99-6010), and rinsing with a low-pressure hose! After your filter is dry, simply reinstall to enjoy the benefits of K&N’s industry-leading washable filtration technology. See the full instructions included with your filter for details.

In my experience the powered electrostatic filters remove nearly everything from the air stream. The navy uses these on submarines to take the pollutants out of the air, in this usage we washed them monthly due to the amount of things they pull from the air. I have had a big Honeywell system on one house I have owned - it was the only house that never had a dust problem. The filter pulled everything from the air. Every 2 or 3 months I would run the cells through the dishwasher then give them a quick look for broken wires. An hour with the blower on and the power off drys them then back on with the power for another 3 months.


These filters can trap very small particles of dust, pollen, mold, and other irritants. Some of these filters work much like the air and oil filters in your car. They are made using pleated filter paper. Other filters are made with fine synthetic polyester fibers. Higher efficiency air filters can sometimes be coated with chemicals that can kill tiny microbes such as bacteria and mold. There are several advantages to using these higher efficiency air filters. Not only will your heating and cooling equipment perform better, your operating costs may well be lower. The air you breathe will be cleaner, as will your furniture and drapes. That $60 service call could have bought 10 filters that may have lasted through five cooling seasons!  Source

The body, which is often called the canister, is significantly larger for these filters than it is for other types of filters. Each canister will have locations to hold each different type of filter media, and the large canisters will have more filter media. This type of filter does take more effort to set up and maintain, in exchange for its power and flexibility.
If you’re not ready for delivery right away, U-Pack offers convenient door-to-door storage options. Just load your belongings, then we’ll store the equipment at a secure service center until you’re ready for delivery. With U-Pack, there’s no need to load and unload multiple times (like at a traditional storage facility). Your items stay loaded in the equipment the entire time.
MERV 13: A MERV 13 air filter however will capture even smaller dust particles, dirt, pollen, mold spores, pet dander and more from your home's air. A MERV 13 air filter is great for people with regular allergies and who own multiple pets. The MERV 13 filter is typically more expensive and will also put more strain on your HVAC system, however the high quality filtration you will get will be well worth it. 
8p this past saturday this dude in his mid 20s came to my door selling something similar. he led on that he represented (was subbed for) the utility company. he kept insisting that he needed to see my water shutoff valve and he had something that would save me a lot of money (more money than i actually pay in water consumption!). i kept letting him talk just to shoot down his bullshit circle talking, it was more amusing for me to troll his nonsense and keep him in the cold while wasting both our times. definitely didn't let him in. interesting how others also agree this was bullshit, yet sad to know others fall for this.
Improve the performance of your air purifier with this Blueair 200 Series DualProtection filter. The unique design of this filter uses high-porosity coconut carbon to filter smoke, smog, odors or other gaseous contaminants from your breathing space. This Blueair 200 Series DualProtection filter uses HEPASilent technology that removes micro-particles as small as pet dander, mold spores and bacteria .
Safe, clean drinking water is one of the most important health concerns for families. Even in the United States, it is possible to get municipal drinking water that still has contaminants and the current direction of the EPA isn't helping and even though the water may technically meet the minimum safety requirements of the federal government, many contaminants are never tested for.  At BestFilters.com, customers will find the water filters that they need to ensure they have safe and clean water. Drinking water can be contaminated from a number of sources and with our water infrastructure problems, the water that leaves the water treatment facility may not be the same water at your tap. Ask the folks in Flint MI.  Chemical pesticides and other ground water pollutants can seep into the municipal water supply and find their way into the homes of residents. Over time, this can lead to serious health problems and lower the quality of life. The water filters at BestFilters.com keep most of these contaminants away from homeowners. 
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