Furnace filter comparison

Many types of furnace filters are available on the market, each with advantages and disadvantages. Here’s a comparison of some of the most common types:

  1. Fibreglass filters are the most basic type of furnace filter made from layered fibreglass fibres. They are inexpensive but have a low MERV rating (minimum efficiency reporting value) and do not capture small particles such as pollen or pet dander.
  2. Pleated filters: These are made from pleated polyester or cotton and have a higher MERV rating than fibreglass filters. They capture small particles more effectively but need to be changed more frequently.
  3. Electrostatic filters: These filters use an electrostatic charge to attract and capture particles. They are more effective than pleated filters and have a higher MERV rating but they can be more expensive.
  4. HEPA filters are the most effective type of furnace filter, with a MERV rating of 17-20. They capture small particles such as smoke, bacteria, and viruses but can also restrict airflow and require a stronger blower motor.
  5. Washable filters: These filters are made from foam or mesh and can be cleaned and reused. They are a good option for people who want to reduce waste and save money in the long run, but they may not be as effective as disposable filters.

Ultimately, the best furnace filter for you will depend on your specific needs and budget. It’s important to choose a filter that balances filtration efficiency with airflow and cost and to change the filter regularly to ensure optimal performance.