The equation used in calculating filter sizes is: Pool capacity in gallons divided by the desired turnover rate in hours. This will give you the minimum flow needed in gal/m (Gallons per minute). Divide this number by 60 to get the gal/m.
Do air filters have to be exact size?
Since air filters are most often sold by their nominal dimensions, it is crucial to learn how to properly measure your air filter. When making your purchase, you should order your filter by its nominal size, rather than its actual size.
How do I measure my AC filter?
- Step 1 - Measuring Length and Width (L x W). (If your filter is not a square, the smallest measurement goes first).
- Step 2 - Measure the thickness (Depth) of your filter from front to back.
- Step 3 - Put Your measurements together (L x W x D).
How do I know what size air filter I need?
Actual Size: The actual size of an air filter is typically written in the fine print on the frame of the filter and is usually 0.25"-0.5" smaller than the advertised, nominal size. The actual size is what you'd find if you used a ruler to measure the exact dimensions of the filter.
What is the most common HVAC filter size?
The most common AC filter sizes and furnace filter sizes are the 16x20x1 air filter, 20x20x1 air filter, the 16x25x1 air filter and the 20x25x1 air filter.
Are air filters one size fits all?
Air Filter Sizes for Your Home Can Be Frustrating Unfortunately, that's not the case there are about 20 “standard sizes” for air filters, and none have the same measurements. Even worse, incorrectly sized air filters can place undue stress on your HVAC system, damaging it and increasing your energy bills.
Can my furnace handle a MERV 16?
All central air furnaces and air conditioning units can handle MERV 16 filters; however, since MERV 16 filters tend to be quite deep when compared to traditional filters, the installation of a dedicated aftermarket housing is required, which is not always feasible.
Is MERV 16 a hospital grade?
In general, filters with a rating of MERV 16 or below are considered to be HVAC-system-grade filters for residential, commercial and general hospital use. MERV 17 through MERV 20 filters are typically used in surgical operating rooms, clean rooms and other contexts that require absolute cleanliness.
Is MERV 13 better than 16?
MERV 13 will prevent less than 75% of the 0.3-1.0 micron particles from passing through, MERV 14 will get up to 84%, MERV 15 up to 94% and MERV 16 can trap 95% or more of the smallest particles.Dec 4, 2019
Is MERV 16 too high?
Filters within a MERV rating of 17-20 are almost never necessary in a residential home. A MERV rating of 13-16 is considered hospital level air quality, so it is unlikely your home needs any more than that.
Is MERV 13 too high for residential?
One factor to consider is air flow through the system. In some cases, using an air filter that is too restrictive for your system may cause low air flow problems as well. MERV 13 is the highest MERV value safe for residential furnaces; the higher ratings are used primarily in commercial units.
Is MERV 13 good enough?
Minimum Efficiency Reporting Values, or MERV, reports a filter's ability to capture particles. Filters with MERV-13 or higher ratings can trap smaller particles, including viruses. By itself, using an upgraded HVAC filter is not enough to protect people from COVID-19.