The rule of thumb is if it looks dirty it is dirty if you want a smarter way to determine when it needs replacing install an air filter gauge general g 99 air filter gauge kit.
Difference between air conditioner filter and furnace filter.
Fpr ratings are on a scale from 4 through 10.
Mpr measures ratings based on sizes 0 3 to 1 microns.
It is also yes if your house or home has a separate cooling hvac or ac unit and heating furnace unit as they both typically share the same air handler.
Your home also has filters in each of the air vent intakes.
The truthful statement is filters with a merv rating below 11 have lower than 20 capture efficiency between 0 3 and 1 0 microns the reality is furnace filters are very high margin products that are very profitable to sell and companies like home depot don t do much in the way of providing useful information to the customer.
If your home has centralized cooling and heating the systems use the same filter in the air handler.
However particles like mold bacteria and certain types of pollen are much smaller in size so they slip right through the fibers of those regular filters.
It measures airflow between the filter and the furnace via a small hose.
If you have any questions about your furnace and air conditioner s air filter or if you d like a cooling system serviced or installed in your home contact jerry kelly your st.
The furnace and air conditioner filters we would buy.
Most often this filter is found in the same area as the furnace.
Updated may 22 2019.
One filter for your whole home while many people refer to air conditioning and furnace filters as if they re different this is not the case.
The three air filter rating systems differ in ranges and were created by separate organizations.
Charles heating and air conditioning contractor.
Is there a difference between air filters and furnace filters.
The answer to this question is yes if your house or home has central heat and air conditioning.
The merv filter rating is the domestic and.
We ve read through this guide and we stand by our pick for the best filter the nordic pure merv 12.
Those paper filters ordinarily used in your furnace and air conditioner are designed to trap large particles like dust that can accumulate on the motor and fans and reduce efficiency.
Find out if there is a difference between your ac and furnace filter and learn why filters are so important to your hvac system.
We service the st.
Louis area including towns like chesterfield clarkson valley and clayton.
Is a furnace filter the same thing as an air conditioning filter.