FREQUENTLY ASKED QUESTIONS
How often is cleaning required?
The IFD
™
filter reset light will illuminate to indicate that the IFD
™
filter should be cleaned. We
recommend cleaning the filter about once a month depending on the air quality of the room.
I just cleaned my filter but the filter indicator bar is still showing it is dirty, what’s wrong?
Each time you clean your filter you must reset the filter life indicator. It is a timer driven indicator to be
used as a guideline, but does not represent the actual amount of dirt in the IFD
™
filter. With the unit
running, press and hold the appropriate button for up to 10 seconds and when you let go, the filter
indicator bar should be reset.
The filter indicator bar on my unit is completely full but my filter doesn’t really look dirty.
The filter indicator on your unit is timer-based and does not measure the amount of particles in the
IFD
™
filter. It is possible that your filter indicator could indicate that the filter is dirty but some particles
are so small that they cannot be seen but are present in the filter. We recommend cleaning the IFD
™
filter (see
Removing/Cleaning the IFD
™
Filter
in the manual).
My filter bar says my filter is still relatively clean but when I checked my filter it was really dirty.
In conditions where smoke, pets or air with a lot of contaminants are present it is possible that the filter
could be dirty sooner than indicated on the indicator. The filter life indicator on your unit runs on a timer
and if there are more particles in your air than in an average home, your filter could capture airborne
particles sooner than indicated on the display. The indicator is intended to be used as a guideline and
individual environmental conditions will vary.
Is the HHT-215 Air Purifier considered an ozone generator?
No. Ozone generators produce large amounts of ozone as the primary way to clean the air. The EPA
does not endorse these products because they can cause ozone related health problems. The HHT-215
does not use ozone as the primary method to clean the air. It cleans the air by using IFD
™
technology
(Intense Field Dielectric) which only generates trace amounts of ozone, well below the limits established
by the EPA.
CLEANING AND MAINTENANCE
• Use a clean, dry cloth to wipe the external surfaces of the air purifier. DO NOT USE WATER, GASOLINE,
POLISH, OR ANY CHEMICAL SOLUTION.
• The IFD
™
filter and pre-filter should be cleaned at least once every three months, or sooner depending
on the air quality of the room (See
“Removing/Cleaning the IFD
™
Filter”
or
“Cleaning the Pre-Filter”
respectively).
NOTE:
If you smoke, burn candles or oil lamps in your home, it is recommended that you wash your filter
more frequently. When burned in an enclosed space, candles and oil lamps have a tendency to introduce
soot into the air.
Please make certain that the unit is OFF and unplugged.
To install the IFD
™
Filter and pre-filter:
• Insert the lower tab of the pre-filter frame into the filter
assembly and press the top tab into the filter assembly
until you hear a “click” (Fig. 15).
• Align the filter assembly with the opening in the unit and
insert back into the unit (Fig. 16). Press until it is flush
and you hear a “click”.
INSTALLING THE FILTERS
Fig. 16
Fig. 15
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