{"id":1699,"date":"2025-10-31T12:08:05","date_gmt":"2025-10-31T11:08:05","guid":{"rendered":"https:\/\/www.ofenfeinstaubfilter.de\/service\/faq\/"},"modified":"2026-07-08T11:16:48","modified_gmt":"2026-07-08T09:16:48","slug":"faq","status":"publish","type":"page","link":"https:\/\/www.ofenfeinstaubfilter.de\/en\/service\/faq\/","title":{"rendered":"FAQ"},"content":{"rendered":"<div class=\"wpb-content-wrapper\" id=\"wpb-content-root\"><p>[vc_row el_class=&#8221;padding-container background-ornament-hero&#8221;][vc_column]\n<section class=\"hero-subpage-section-wrapper \">\n    <div class=\"hero-subpage-section-left\n                         col-12\n            \">\n                    <h1 class=\"hero-headline\">FAQ<\/h1>\n                \n            <\/div>\n\n\n    <\/section>[\/vc_column][\/vc_row][vc_row el_class=&#8221;c_container&#8221;][vc_column]\n<div class=\"product-expandable-sections \">\n    <div class=\"container\">\n        <div class=\"expandable-sections\">\n            <div class=\"expandable-section\">\n                <button class=\"section-header\" data-section=\"vc-accordion-6306725\">\n                    <span>Who is the BERTRAMS oven fine dust filter suitable for?<\/span>\n                    <svg class=\"arrow\"><use href=\"#chevron-down\"><\/use><\/svg>\n                <\/button>\n                <div class=\"section-content\" id=\"vc-accordion-6306725\">\n                    <div class=\"section-content-inner\">\n                    The stove fine dust filter is suitable both for private individuals who want to continue operating their wood-burning stove in their own home in an environmentally friendly and legally compliant manner, and for specialist companies, chimney sweeps and stove builders who offer retrofit solutions for their customers.                    <\/div>\n                <\/div>\n            <\/div>\n        <\/div>\n    <\/div>\n<\/div>\n\n<div class=\"product-expandable-sections \">\n    <div class=\"container\">\n        <div class=\"expandable-sections\">\n            <div class=\"expandable-section\">\n                <button class=\"section-header\" data-section=\"1\">\n                    <span>How exactly does the filter work?<\/span>\n                    <svg class=\"arrow\"><use href=\"#chevron-down\"><\/use><\/svg>\n                <\/button>\n                <div class=\"section-content\" id=\"1\">\n                    <div class=\"section-content-inner\">\n                    Emissions are reduced in two stages. First, gaseous emissions such as carbon monoxide (CO) and organic gaseous hydrocarbons (OGC) are reduced in the direction of flow through the use of sponge ceramic catalysts. In the second stage, particulate matter is reduced by means of a glass fibre filter stack, which ensures particularly efficient separation of the finest particles thanks to its depth filter effect. Further information on how the particulate filter works can be found in the operating <b><a href=\"\/wp-content\/uploads\/2025\/07\/Kurzanleitung_Culimeta_Feinstaubfilter.pdf\">instructions<\/a><\/b>.                     <\/div>\n                <\/div>\n            <\/div>\n        <\/div>\n    <\/div>\n<\/div>\n\n<div class=\"product-expandable-sections \">\n    <div class=\"container\">\n        <div class=\"expandable-sections\">\n            <div class=\"expandable-section\">\n                <button class=\"section-header\" data-section=\"2\">\n                    <span>How does this product differ from other filter systems on the market?<\/span>\n                    <svg class=\"arrow\"><use href=\"#chevron-down\"><\/use><\/svg>\n                <\/button>\n                <div class=\"section-content\" id=\"2\">\n                    <div class=\"section-content-inner\">\n                    The filter system operates with two-stage filtration, in which emission reduction is divided into two independent phases: the reduction of gaseous emissions and particle filtration. Since both phases function separately, the cleaning intervals are also optimally adapted to their respective requirements.                     <\/div>\n                <\/div>\n            <\/div>\n        <\/div>\n    <\/div>\n<\/div>\n\n<div class=\"product-expandable-sections \">\n    <div class=\"container\">\n        <div class=\"expandable-sections\">\n            <div class=\"expandable-section\">\n                <button class=\"section-header\" data-section=\"3\">\n                    <span>Which standards\/regulations are complied with?<\/span>\n                    <svg class=\"arrow\"><use href=\"#chevron-down\"><\/use><\/svg>\n                <\/button>\n                <div class=\"section-content\" id=\"3\">\n                    <div class=\"section-content-inner\">\n                    <b>DIBt<\/b> test plan for dust separators (EN16510) and DIN SPEC 33999:2014, in accordance with the requirements of 1.BImSchV                    <\/div>\n                <\/div>\n            <\/div>\n        <\/div>\n    <\/div>\n<\/div>\n\n<div class=\"product-expandable-sections \">\n    <div class=\"container\">\n        <div class=\"expandable-sections\">\n            <div class=\"expandable-section\">\n                <button class=\"section-header\" data-section=\"4\">\n                    <span>Where did the examination take place?<\/span>\n                    <svg class=\"arrow\"><use href=\"#chevron-down\"><\/use><\/svg>\n                <\/button>\n                <div class=\"section-content\" id=\"4\">\n                    <div class=\"section-content-inner\">\n                    At the Rhein-Ruhr Fireplace Testing Centre \u2013 D-46047 Oberhausen and at ChimneyLab Europe ApS \u2013 DK-8370 Hadsten                    <\/div>\n                <\/div>\n            <\/div>\n        <\/div>\n    <\/div>\n<\/div>\n\n<div class=\"product-expandable-sections \">\n    <div class=\"container\">\n        <div class=\"expandable-sections\">\n            <div class=\"expandable-section\">\n                <button class=\"section-header\" data-section=\"5\">\n                    <span>What does installing the filter mean for the operation of my stove?<\/span>\n                    <svg class=\"arrow\"><use href=\"#chevron-down\"><\/use><\/svg>\n                <\/button>\n                <div class=\"section-content\" id=\"5\">\n                    <div class=\"section-content-inner\">\n                    If approval can be granted by the chimney sweep (regulations vary from state to state), then the existing stove can continue to be used without any further time restrictions.                    <\/div>\n                <\/div>\n            <\/div>\n        <\/div>\n    <\/div>\n<\/div>\n\n<div class=\"product-expandable-sections \">\n    <div class=\"container\">\n        <div class=\"expandable-sections\">\n            <div class=\"expandable-section\">\n                <button class=\"section-header\" data-section=\"6\">\n                    <span>Recommended fuel<\/span>\n                    <svg class=\"arrow\"><use href=\"#chevron-down\"><\/use><\/svg>\n                <\/button>\n                <div class=\"section-content\" id=\"6\">\n                    <div class=\"section-content-inner\">\n                    The tests were carried out with firewood in accordance with EN 16510-2-1.                    <\/div>\n                <\/div>\n            <\/div>\n        <\/div>\n    <\/div>\n<\/div>\n\n<div class=\"product-expandable-sections \">\n    <div class=\"container\">\n        <div class=\"expandable-sections\">\n            <div class=\"expandable-section\">\n                <button class=\"section-header\" data-section=\"7\">\n                    <span>What are the dimensions of the filter?<\/span>\n                    <svg class=\"arrow\"><use href=\"#chevron-down\"><\/use><\/svg>\n                <\/button>\n                <div class=\"section-content\" id=\"7\">\n                    <div class=\"section-content-inner\">\n                    \u00d8150mm \/ 300mm height                    <\/div>\n                <\/div>\n            <\/div>\n        <\/div>\n    <\/div>\n<\/div>\n\n<div class=\"product-expandable-sections \">\n    <div class=\"container\">\n        <div class=\"expandable-sections\">\n            <div class=\"expandable-section\">\n                <button class=\"section-header\" data-section=\"9\">\n                    <span>What does the chimney sweep check?<\/span>\n                    <svg class=\"arrow\"><use href=\"#chevron-down\"><\/use><\/svg>\n                <\/button>\n                <div class=\"section-content\" id=\"9\">\n                    <div class=\"section-content-inner\">\n                    The chimney sweep checks whether the filter is suitable based on the technical system data and issues an approval for the fine dust filter.                    <\/div>\n                <\/div>\n            <\/div>\n        <\/div>\n    <\/div>\n<\/div>\n\n<div class=\"product-expandable-sections \">\n    <div class=\"container\">\n        <div class=\"expandable-sections\">\n            <div class=\"expandable-section\">\n                <button class=\"section-header\" data-section=\"10\">\n                    <span>How often do I need to clean the filter?<\/span>\n                    <svg class=\"arrow\"><use href=\"#chevron-down\"><\/use><\/svg>\n                <\/button>\n                <div class=\"section-content\" id=\"10\">\n                    <div class=\"section-content-inner\">\n                    The sponge ceramic catalysts should be visually inspected at regular intervals, depending on the frequency of use. If necessary, they can be cleaned by vacuuming or sweeping. The fine dust filter stack should also be visually inspected at regular intervals. If the filter is saturated, it should be cleaned by burning off the deposits. Weekly cleaning is recommended for regular operation. Detailed recommendations on cleaning intervals can be found in the operating instructions.                    <\/div>\n                <\/div>\n            <\/div>\n        <\/div>\n    <\/div>\n<\/div>\n\n<div class=\"product-expandable-sections \">\n    <div class=\"container\">\n        <div class=\"expandable-sections\">\n            <div class=\"expandable-section\">\n                <button class=\"section-header\" data-section=\"11\">\n                    <span>How long must the filter remain in the embers?<\/span>\n                    <svg class=\"arrow\"><use href=\"#chevron-down\"><\/use><\/svg>\n                <\/button>\n                <div class=\"section-content\" id=\"11\">\n                    <div class=\"section-content-inner\">\n                    The filter stack should remain in the combustion chamber&#8217;s glutathione atmosphere for at least 60 minutes; ideally overnight \u2013 not in an open fire!                     <\/div>\n                <\/div>\n            <\/div>\n        <\/div>\n    <\/div>\n<\/div>\n\n<div class=\"product-expandable-sections \">\n    <div class=\"container\">\n        <div class=\"expandable-sections\">\n            <div class=\"expandable-section\">\n                <button class=\"section-header\" data-section=\"12\">\n                    <span>What is the service life of this product?<\/span>\n                    <svg class=\"arrow\"><use href=\"#chevron-down\"><\/use><\/svg>\n                <\/button>\n                <div class=\"section-content\" id=\"12\">\n                    <div class=\"section-content-inner\">\n                    The catalysts should be replaced after approximately four heating periods (approx. 4,000 operating hours) and the filter stack after one period.                    <\/div>\n                <\/div>\n            <\/div>\n        <\/div>\n    <\/div>\n<\/div>\n\n<div class=\"product-expandable-sections \">\n    <div class=\"container\">\n        <div class=\"expandable-sections\">\n            <div class=\"expandable-section\">\n                <button class=\"section-header\" data-section=\"13\">\n                    <span>Is the material used toxic, or are toxic substances being burned here?<\/span>\n                    <svg class=\"arrow\"><use href=\"#chevron-down\"><\/use><\/svg>\n                <\/button>\n                <div class=\"section-content\" id=\"13\">\n                    <div class=\"section-content-inner\">\n                    No.                    <\/div>\n                <\/div>\n            <\/div>\n        <\/div>\n    <\/div>\n<\/div>\n\n<div class=\"product-expandable-sections \">\n    <div class=\"container\">\n        <div class=\"expandable-sections\">\n            <div class=\"expandable-section\">\n                <button class=\"section-header\" data-section=\"14\">\n                    <span>Where can I buy the filter?<\/span>\n                    <svg class=\"arrow\"><use href=\"#chevron-down\"><\/use><\/svg>\n                <\/button>\n                <div class=\"section-content\" id=\"14\">\n                    <div class=\"section-content-inner\">\n                    <strong>The easiest way to order the filter is directly from our <a href=\"https:\/\/www.ofenfeinstaubfilter.de\/en\/products\/\">shop<\/a>.<\/strong> Alternatively, you can also purchase it from a stove retailer, DIY store or your chimney sweep.                    <\/div>\n                <\/div>\n            <\/div>\n        <\/div>\n    <\/div>\n<\/div>\n\n<div class=\"product-expandable-sections \">\n    <div class=\"container\">\n        <div class=\"expandable-sections\">\n            <div class=\"expandable-section\">\n                <button class=\"section-header\" data-section=\"15\">\n                    <span>Is there a hotline I can call if I have problems with the product?<\/span>\n                    <svg class=\"arrow\"><use href=\"#chevron-down\"><\/use><\/svg>\n                <\/button>\n                <div class=\"section-content\" id=\"15\">\n                    <div class=\"section-content-inner\">\n                    If you have any questions or problems with the filter system, please contact Bertrams \u2013 bertrams@bertrams.co.at \/ Tel +43 1 333 222 1                     <\/div>\n                <\/div>\n            <\/div>\n        <\/div>\n    <\/div>\n<\/div>\n[\/vc_column][vc_column offset=&#8221;vc_hidden-lg vc_hidden-md vc_hidden-sm vc_hidden-xs&#8221;]\n<div class=\"product-expandable-sections \">\n    <div class=\"container\">\n        <div class=\"expandable-sections\">\n            <div class=\"expandable-section\">\n                <button class=\"section-header\" data-section=\"8\">\n                    <span>What do I need to bear in mind during installation?<\/span>\n                    <svg class=\"arrow\"><use href=\"#chevron-down\"><\/use><\/svg>\n                <\/button>\n                <div class=\"section-content\" id=\"8\">\n                    <div class=\"section-content-inner\">\n                    Please consult your chimney sweep beforehand, as retrofitting requires approval\/clearance for each stove.                    <\/div>\n                <\/div>\n            <\/div>\n        <\/div>\n    <\/div>\n<\/div>\n[\/vc_column][\/vc_row][vc_row][vc_column][\/vc_column][\/vc_row]<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>The stove fine dust filter is suitable both for private individuals who want to continue operating their wood-burning stove in their own home in an environmentally friendly and legally compliant manner, and for specialist companies, chimney sweeps and stove builders&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":1696,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-1699","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Frequently asked questions | Furnace dust filters<\/title>\n<meta name=\"description\" content=\"Frequently asked questions about the stove fine dust filter: how it works, DIBt approval, installation, maintenance and cleaning - answered briefly.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.ofenfeinstaubfilter.de\/en\/service\/faq\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" 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