There are a very few simple checks or signs that will indicate if your furnace filter is dirty.

• Visual Check– filter covered with dust and different color.
• Low Air Flow– System gets over heated and stops frequently.
• Health Issues– Increase in fatigue levels, allergies, headaches and breathing issues.
• Higher Energy Bills– Furnace needs to work harder and uses more energy.

When you compare the dirty filter with the new one, you will be able to see the color difference due to dust and dirt. If you don’t have a new one to compare with, it is still very easy to identify dusty vs. clear filter fabric.

Read More on Furnace Filters:

What happens if you forget to change your furnace filter?

What happens if you forget to change your furnace filter? For a short period, let’s say couple of months, it won’t damage anything much. But for a longer period, keeping the furnace without replacing filters can cause multiple issues. Read More on “What happens if you forget to change your furnace filter?”

When to change the furnace filter?

When to change the furnace filter? It is a very common question from first time home buyers. It needs a very simple visual check for the first time and a regular frequency of filter change then after. When you are totally new to the furnace, it may seem like a rocket science, but it is not! Read More on “When to change the furnace filter?”