--- title: "Fireplace with catalytic converter: simply cleaner heating | Spartherm Blog" description: Plan your fireplace with a catalytic converter - for measurably less CO (approx. -35 %) and more conscious heating with the Spartherm S-KAT. image: https://blog.spartherm.com/hubfs/Blog/Kamin%20mit%20Katalysator/undefined.webp --- [Skip to main content](https://blog.spartherm.com/en/fireplace-with-catalytic-converter-heating-cleanly-and-efficiently#main-content) [![Spartherm\_Jubilaeums-Logo-40Jahre\_white](https://blog.spartherm.com/hs-fs/hubfs/Spartherm_Jubilaeums-Logo-40Jahre_white.png?width=220&height=141&name=Spartherm_Jubilaeums-Logo-40Jahre_white.png) ![20598\_SPARTHERM\_Flame\_1c\_white](https://blog.spartherm.com/hs-fs/hubfs/20598_SPARTHERM_Flame_1c_white.png?width=40&height=85&name=20598_SPARTHERM_Flame_1c_white.png) ![Spartherm\_Jubilaeums-Logo-40Jahre\_white](https://blog.spartherm.com/hs-fs/hubfs/Spartherm_Jubilaeums-Logo-40Jahre_white.png?width=180&height=115&name=Spartherm_Jubilaeums-Logo-40Jahre_white.png) ![20598\_SPARTHERM\_Flame\_1c\_white](https://blog.spartherm.com/hs-fs/hubfs/20598_SPARTHERM_Flame_1c_white.png?width=34&height=72&name=20598_SPARTHERM_Flame_1c_white.png)](https://blog.spartherm.com/en) - [HOME](https://blog.spartherm.com/en) - Show submenu for CATEGORIES CATEGORIES - [PLANNING & ADVICE](https://blog.spartherm.com/en/tag/planning-advice) - [TECHNOLOGY & EFFICIENCY](https://blog.spartherm.com/en/tag/technology-efficiency) - [ENVIRONMENT & LAW](https://blog.spartherm.com/en/tag/environment-law) - [OPERATION & MAINTENANCE](https://blog.spartherm.com/en/tag/operation-maintenance) - [LIFESTYLE & INSPIRATION](https://blog.spartherm.com/en/tag/lifestyle-inspiration) - [LOOKBOOK](https://blog.spartherm.com/en/lookbook) - [ABOUT SPARTHERM](https://www.spartherm.com/en/company/about-spartherm/) - [CONTACT](https://blog.spartherm.com/en/contact) - English - Open main navigation Close main navigation - [HOME](https://blog.spartherm.com/en) - Show submenu for CATEGORIES CATEGORIES - CATEGORIES - [PLANNING & ADVICE](https://blog.spartherm.com/en/tag/planning-advice) - [TECHNOLOGY & EFFICIENCY](https://blog.spartherm.com/en/tag/technology-efficiency) - [ENVIRONMENT & LAW](https://blog.spartherm.com/en/tag/environment-law) - [OPERATION & MAINTENANCE](https://blog.spartherm.com/en/tag/operation-maintenance) - [LIFESTYLE & INSPIRATION](https://blog.spartherm.com/en/tag/lifestyle-inspiration) - [LOOKBOOK](https://blog.spartherm.com/en/lookbook) - [ABOUT SPARTHERM](https://www.spartherm.com/en/company/about-spartherm/) - [CONTACT](https://blog.spartherm.com/en/contact) - English - English - Suche Search # Fireplace with a catalytic converter: simply cleaner heating | Spartherm Blog Reading time: 4min Are you planning your dream fireplace and want to focus not only on design and performance, but also on meeting the ever-increasing environmental requirements? A catalytic converter in the fireplace makes exactly that possible: it measurably reduces the CO, OGC and - as a side effect - also the fine dust emissions of your stove so that you can enjoy your fire with a clear conscience. ## What you can expect 1. [What does a catalytic converter do in a wood-burning stove?](https://blog.spartherm.com/en/fireplace-with-catalytic-converter-heating-cleanly-and-efficiently#katalysator) 2. [Fireplace with and without catalytic converter: the difference](https://blog.spartherm.com/en/fireplace-with-catalytic-converter-heating-cleanly-and-efficiently#mit-ohne) 3. [The Spartherm S-KAT catalytic converter](https://blog.spartherm.com/en/fireplace-with-catalytic-converter-heating-cleanly-and-efficiently#s-kat) 4. [Frequently asked questions and answers](https://blog.spartherm.com/en/fireplace-with-catalytic-converter-heating-cleanly-and-efficiently#faq) ![Beautiful flames](https://blog.spartherm.com/hs-fs/hubfs/Blog/Kamin-Assistenzfunktionen%20-%20Abbrandsteuerung%20bis%20automatische%20Scheiben%C3%B6ffnung/Blogbeitrag_Spartherm-Kamin-Mythen-1.jpg?width=635&height=221&name=Blogbeitrag_Spartherm-Kamin-Mythen-1.jpg) ## What does a catalytic converter do in a wood-burning stove? In addition to the main emission components, wood combustion also produces undesirable emissions - primarily CO (carbon monoxide), OGC (unburned hydrocarbons) and NOx (nitrogen oxides). Their quantity varies depending on the combustion phase. What is often underestimated: How much of these pollutants are actually released into the environment depends heavily on how completely your stove burns. This is exactly where a catalytic converter comes in. It ensures that pollutants in the exhaust gas are broken down through catalytic post-combustion. In other words, the harmful components are removed or cleaned from the exhaust gases. The principle behind it is as elegant as it is effective: the catalytic converter is usually a ceramic or metallic element with a special coating of platinum or palladium. This surface accelerates the chemical reaction in which pollutants are converted into CO₂ - fully automatically, without you having to adjust or regulate anything. What you get out of it: - Compliance with the legal limits - Significantly reduced CO emissions - More environmentally conscious heating - without sacrificing enjoyment of the fireplace - More energy from your firewood - Less soot and deposits in the stove and chimney  ## Fireplace with and without catalytic converter - the difference using the example of a Spartherm® fireplace ![Illustration showing how a fireplace works with and without a catalytic converter](https://blog.spartherm.com/hs-fs/hubfs/Blog/Kamin%20mit%20Katalysator/25A0151_Blog_Katalysator_Grafik.jpg?width=2560&height=1251&name=25A0151_Blog_Katalysator_Grafik.jpg) Promises are good - figures are better. Using the Spartherm Arte U-90h as an example, the emission values were measured in an independent test report: once without and once with a catalytic converter. The result is clear: CO emissions are reduced by around 35% - from 1,070 to 691 mg/m³. Not a theoretical value, but a measurable effect that you can feel from the very first flame. ## The Spartherm S-KAT catalytic converter - invisible to the eye, noticeable for the environment The S-KAT from Spartherm delivers exactly what you want from a fireplace: a crackling fire, cozy warmth - and a clear conscience. It can be upgraded in most Spartherm models and works quietly in the background so that you can simply enjoy. What sets the S-KAT apart: - Automatic action - works by itself, at any time and without manual adjustment - Easy cleaning - conveniently via the combustion chamber, using a vacuum cleaner with brush attachment - Measurably less CO - thanks to catalytic afterburning - Compatible with almost all Spartherm models - can be integrated directly ex works and can also be retrofitted in some cases   Important: The catalytic converter cannot be retrofitted to all models. Your specialist dealer will be happy to help you take it into account at the planning stage - so that your stove burns as cleanly as possible from day one. [Find out more about S-KAT](https://www.spartherm.com/en/products/cair-fireplace-assistance-functions/#s-kat) ## Frequently asked questions Does a catalytic converter really make a difference? Yes - and it can be measured. Taking the Spartherm Arte U-90h as an example, the catalytic converter reduced CO emissions by around 35%. This is not an empty promise, but a proven test value. Do I have to do anything differently with a stove with a catalytic converter? No. The S-KAT works fully automatically - you heat as normal, it does the rest. How time-consuming is the maintenance? Not at all. The S-KAT can simply be cleaned via the combustion chamber if necessary. Neither special tools nor a specialist are required. Will the S-KAT fit into my Spartherm stove? The S-KAT is available for almost all Spartherm models - either integrated straight from the factory or, in some cases, as a retrofit solution. Your local specialist dealer will be happy to advise you and find the right option for your stove. [Find a specialist retailer](https://www.spartherm.com/en/search-for-dealers/) ### You might also be interested in: #### [![](https://blog.spartherm.com/hubfs/Blog/Ist%20das%20Heizen%20mit%20einem%20Kamin%20CO%E2%82%82-neutral/spartherm-nachhaltigkeit-kamin-feuer-machen-titel.jpg) environment & law 5min read | 25.02.2026 Is heating with a fireplace carbon-neutral? 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But you soon realize: The ...](https://blog.spartherm.com/en/what-requirements-must-a-wood-burning-stove-meet-from-2025-onwards) ###### Categories - [Planning & Advice](https://blog.spartherm.com/en/tag/planning-advice) - [Environment & Law](https://blog.spartherm.com/en/tag/environment-law) - [Operation & Maintenance](https://blog.spartherm.com/en/tag/operation-maintenance) - [Technology & Efficiency](https://blog.spartherm.com/en/tag/technology-efficiency) - [Lifestyle & Inspiration](https://blog.spartherm.com/en/tag/lifestyle-inspiration) ###### Recent posts - [Is heating with a fireplace carbon-neutral?](https://blog.spartherm.com/en/is-heating-with-a-fireplace-carbon-neutral) - [What requirements must a wood-burning stove meet starting in 2025?](https://blog.spartherm.com/en/what-requirements-must-a-wood-burning-stove-meet-from-2025-onwards) - [The Facts About Wood Fires](https://blog.spartherm.com/en/wood-fires-the-facts) - [About Spartherm](https://www.spartherm.com/en/company/about-spartherm/) - [Contact](https://blog.spartherm.com/en/contact) - [Newsletter](https://blog.spartherm.com/en/newsletter-sign-up) [![SPARTHERM® 40 Jahre 1996–2026](https://blog.spartherm.com/hs-fs/hubfs/raw_assets/public/sprocket_rocket/images/logos/Spartherm_Jubilaeums-Logo-40Jahre_white.png?width=235&height=150&name=Spartherm_Jubilaeums-Logo-40Jahre_white.png)](https://www.spartherm.com/de/) - - - - ©2026 SPARTHERM – The Spartherm Blog - [Imprint](https://blog.spartherm.com/en/imprint) - [Data Protection](https://blog.spartherm.com/en/data-protection) - [HOME](https://blog.spartherm.com) - KATEGORIEN - [PLANUNG & BERATUNG](https://blog.spartherm.com/tag/planung-beratung) - [TECHNIK & EFFIZIENZ](https://blog.spartherm.com/tag/technik-effizienz) - [UMWELT & RECHT](https://blog.spartherm.com/tag/umwelt-recht) - [BETRIEB & PFLEGE](https://blog.spartherm.com/tag/betrieb-pflege) - [LIFESTYLE & INSPIRATION](https://blog.spartherm.com/tag/lifestyle-inspiration) - [LOOKBOOK](https://blog.spartherm.com/lookbook) - [ÜBER SPARTHERM](https://www.spartherm.com/de/unternehmen/ueber-spartherm/) - [KONTAKT](https://blog.spartherm.com/kontakt) - [Impressum](https://blog.spartherm.com/impressum) - [Datenschutz](https://blog.spartherm.com/datenschutz) ![20598\_SPARTHERM\_Logo\_4c\_weiss\_mitClaim-1](https://blog.spartherm.com/hs-fs/hubfs/20598_SPARTHERM_Logo_4c_weiss_mitClaim-1.png?width=335&height=172&name=20598_SPARTHERM_Logo_4c_weiss_mitClaim-1.png "20598_SPARTHERM_Logo_4c_weiss_mitClaim-1") © 2026 Spartherm Feuerungstechnik GmbH ```json { "@context" : "https://schema.org", "@type" : "BlogPosting", "author" : { "@type" : "Person", "name" : "Spartherm", "url" : "https://blog.spartherm.com/en/author/spartherm" }, "dateModified" : "2026-09-25T13:40:19.664Z", "datePublished" : "2026-06-09T06:00:00.000Z", "headline" : "Fireplace with catalytic converter: simply cleaner heating | Spartherm Blog", "image" : [ "https://blog.spartherm.com/hubfs/Blog/Kamin%20mit%20Katalysator/undefined.webp" ], "mainEntityOfPage" : { "@id" : "https://blog.spartherm.com/en/fireplace-with-catalytic-converter-heating-cleanly-and-efficiently", "@type" : "WebPage" }, "publisher" : { "@type" : "Organization", "logo" : { "@type" : "ImageObject", "url" : "https://blog.spartherm.com/hubfs/20598_SPARTHERM_Logo_4c-2.png" }, "name" : "Spartherm Feuerungstechnik GmbH" } } ```