How often is filter replacement for the HM400?
The HM 400 filter is a core filter that combines a HEPA filter and activated carbon. It is good for 5 yrs. under normal use before it needs to be replaced. If used in high contamination areas over long periods of time, it may need to be replaced sooner. In addition to the core there is a cotton filter called a pre-filter. This pre-filter lines the insides of the frame and is used to remove the large dust particles. By vacuum the sides of you HealthMate air purifier, maybe once a month, you will ensure good air flow. You may want to consider replacing the pre-filter one a year.
The HM 400filter is a core filter that combines a HEPA filter and activated carbon. It is good for 5 yrs. under normal use before it needs to be replaced. If used in high contamination areas over long periods of time, it may need to be replaced sooner. In addition to the core there is a cotton filter called a pre-filter. This pre-filter lines the insides of the frame and is used to remove the large dust particles. By vacuum the sides of you HealthMate air purifier, maybe once a month, you will ensure good air flow. You may want to consider replacing the pre-filter one a year.
