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The benefits of changing your furnace filter

Ok, we all know we’re supposed to change the filter on our furnace. But it seems to be one of those things we don’t remember to do on a regular basis ( out of sight, out of mind). However the benefits of changing your furnace filter are well worth it.

  • Enhanced Energy Efficiency: While dust and grime builds up on the filter the efficiency of the furnace decreases. Replacing a clogged filter can increase the furnaces efficiency by 15%.
  •  Improved Indoor Air Quality: A furnace filter is rated by the number and size of particles that it can trap. MERV (Minimum Efficiency Reporting Value) is a rating system developed by the American Society of Heating, Refrigeration and Air Conditioning Engineers to give a simplistic method of comparing filters. The higher the MERV rating, the more efficient the filter is at capturing smaller particles. If there are young children, elderly, or anyone suffering from allergies or asthma, consider using a filter with a high MERV rating. Visit  for more on MERV ratings.
  • Save Money on Repair Costs: A dirty or clogged furnace filter will allow dust and grime to settle on the components inside the furnace. This can lead to premature breakdowns and costly repairs.

How often should I change my furnace filter

Depending on the quality of the filter that you use, you should change it every 1 to 3 months. One month being recommended and three months being the maximum amount of time between changes. For all the benefits a clean filter provides it is well worth the cost of a new filter every month. The picture of the furnace filter is what the majority of filters look like that I find when doing a home inspection in Northwest Indiana.