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There are many misconceptions about forced air furnace filter. Understanding of what the furnace filter does and what it does not will save you on furnace repairs and the energy bills; it will improve living conditions in the house at the same time.
Some of the misconceptions about furnace filters are listed below with short explanations.
The furnace filter is always at work.
The furnace filter does its job only when air is passing through the filter. When the furnace fan is in automatic mode, it is moving air approximately only 20% of the time.
When we want the furnace filter to clean air 24/7, we turn the furnace fan to continuous operations.
The furnace filter keeps your house clean.
No, it does not. No furnace filter can keep the house clean. Visible dust gets into the house through doors and windows, on dirty shoes and clothes. Dust falls down before it has a chance to get sucked into the
Some of the misconceptions about furnace filters are listed below with short explanations.
The furnace filter is always at work.
The furnace filter does its job only when air is passing through the filter. When the furnace fan is in automatic mode, it is moving air approximately only 20% of the time.
When we want the furnace filter to clean air 24/7, we turn the furnace fan to continuous operations.
The furnace filter keeps your house clean.
No, it does not. No furnace filter can keep the house clean. Visible dust gets into the house through doors and windows, on dirty shoes and clothes. Dust falls down before it has a chance to get sucked into the
About Furnace Filter
ductwork and get caught by the furnace filter.
The main purpose of the furnace filter is to keep air in the house clean.
The main purpose of the furnace filter is to protect the furnace. We can try to accomplish other things with the furnace filter - remove allergens, bacteria, etc. - but the first and the main thing is the furnace protection.
While amount of dust going through the furnace is relatively small, over the time steady build up even small amounts of dust inside the furnace will block air flow and will eventually ruin the furnace and the air conditioner.
Today's high efficiency furnaces are especially sensitive to disruptions of air flow, and the consequences are very expensive. The furnace filter does a good job of protecting the
The main purpose of the furnace filter is to keep air in the house clean.
The main purpose of the furnace filter is to protect the furnace. We can try to accomplish other things with the furnace filter - remove allergens, bacteria, etc. - but the first and the main thing is the furnace protection.
While amount of dust going through the furnace is relatively small, over the time steady build up even small amounts of dust inside the furnace will block air flow and will eventually ruin the furnace and the air conditioner.
Today's high efficiency furnaces are especially sensitive to disruptions of air flow, and the consequences are very expensive. The furnace filter does a good job of protecting the
Misconceptions About Furnace Filter
furnace, unless it gets plugged up with dust itself.
Dust is dust. All dust is equally bad.
Actually, only the smallest particles are health hazard. They contain bacteria, insect dust, pollen, pet dander, smoke and smog. Larger particles do not make into the lungs and are not a health hazard.
Dense enough filter will catch even the smallest particles.
Unfortunately, brutal force approach does not work with filters. A filter dense enough to stop harmful smallest particles would also block air flow.
To sum up the options:
1. If you keep the furnace fan in the automatic mode, use a regular furnace filter.
2. If you want to use a good furnace filter, keep furnace fan continuously running.
Dust is dust. All dust is equally bad.
Actually, only the smallest particles are health hazard. They contain bacteria, insect dust, pollen, pet dander, smoke and smog. Larger particles do not make into the lungs and are not a health hazard.
Dense enough filter will catch even the smallest particles.
Unfortunately, brutal force approach does not work with filters. A filter dense enough to stop harmful smallest particles would also block air flow.
To sum up the options:
1. If you keep the furnace fan in the automatic mode, use a regular furnace filter.
2. If you want to use a good furnace filter, keep furnace fan continuously running.
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