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         document.write('<style type="text/css">.hreview { font-family: '+pg_review_font+'; font-size: '+pg_review_font_size+'px; border-style: solid; border-width: '+pg_review_border_width+'px; border-color: '+pg_review_border_color+'; }.review_header { background-color: '+pg_review_header_color+'; padding: 5px;}.rating_container { }.dtreviewed { }.reviewer { }.description { background-color: '+pg_review_summary_color+'; padding: 8px;}.add_review { padding: 5px; }</style>'); document.write('<div class="add_review"><center><a href="" class="add_review_link" onclick="window.open(\'http://ah.pricegrabber.com/rating_prodrev_popup.php?product_id=12998852&id_type=masterid&retid=2112&retsku=HONY01W\',\'prodrev_popup\',\'width=600,height=400,resizable=yes,scrollbars=yes\');return false;">Write a review</a></center></div><div class="hreview"><div class="review_header"><span>Reviewed by: <span class="reviewer">nickkyyyy</span></span> on <span class="dtreviewed">28-Apr-08</span><span class="rating_container"> <b>Rating:</b><span class="rating"> <img src="http://i.pgcdn.com/images/rating_4_newr.gif" style="height:11px; width=60px; border:none;" alt="4 Star Review" /></span></span></div><div class="description"><div class="strengths"><b>Strengths:</b>- No filter changed- Easy to clean filter</div><div class="weaknesses"><b>Weaknesses:</b>- Not reach HEPA standard- A bit noisy if you have a hard time sleep</div><div class="summary"> <b>Summary:</b>HFD-130 is a good unit and it certainly works. I have seen dust particles collected on the pre-filter and the discharged collector plate. Smaller particles are collected inside the IFD filter. When I dipped the IFD filter into water to clean, the water changed its color to light grey. It is not difficult to clean the filter. It is more difficult to wait for it to dry out before putting it back to the purifier. It takes at least 4 hours to air dry it. Some complain that they see dust collected around the exhaust of this purifier, and I have too, which means these dust particles are not trapped inside the filter, but that does not mean the purifier is not working. It is just working differently than you may expected. This purifier is not designed to capture large visible particles, rather the small invisible ones. For this units, ions are generated by electrical discharge and the ions attach to nearby airborne particles. For the larger particles, they will aggregate and fall due to their weight, and that is why dusts are collected at the collector plate. Some however will fall around the purifier including the exhaust. These large particles are still removed from the air, they are simply not trapped inside the filter. This, however, is not the main purification mechanism. The main purification is that ions attach to small airborne particles and these charged particles drift to the charged IFD filter. The larger particles cannot be trapped by IFD because of their momentum. Keep in mind that allergy is caused by the smaller invisible particles. If you want a purifier which can trap large visible particles efficiently, then you will have to get a real HEPA purifier. </div></div></div><div class="add_review"><center><span class="pg_no_reviews"><a href="" class="add_review_link" onclick="window.open(\'http://ah.pricegrabber.com/rating_prodrev_popup.php?product_id=12998852&id_type=masterid&retid=2112&retsku=HONY01W\',\'prodrev_popup\',\'width=600,height=400,resizable=yes,scrollbars=yes\');return false;">Write a review</a></span></center></div><br>');