{"product_id":"oekotube-outside-electrostatic-chimney-filter-for-wood-fired-saunas","title":"OekoTube Outside Electrostatic Chimney Filter for Wood-Fired Saunas","description":"\u003ch2\u003eOekoTube Outside Electrostatic Chimney Filter for Wood-Fired Saunas\u003c\/h2\u003e\n\n\u003cp\u003eIf you operate a wood-fired sauna and have received a written smoke complaint or a letter from a state environmental agency, this is the equipment that addresses it. The OekoTube Outside is a chimney-top electrostatic precipitator from OekoSolve, a Swiss manufacturer that has built fine-dust separators for wood-firing systems since 2006. It mounts at the flue outlet and removes particulate matter from the exhaust before it leaves the stack.\u003c\/p\u003e\n\n\u003ch3\u003eHow it works\u003c\/h3\u003e\n\n\u003cp\u003eA high-voltage electrode suspended in the center of the flue imparts an electrical charge to the fine particles carried in the exhaust stream. The charged particles migrate to the grounded flue wall and adhere there, rather than exiting the chimney as visible smoke. Because the mechanism is electrostatic rather than filtration, there is no media to replace and no measurable increase in flue resistance — draft is unaffected. Accumulated dust is removed with a conventional chimney brush during normal sweeping.\u003c\/p\u003e\n\n\u003cp\u003eWood smoke opacity is the specific problem this solves. In most wood-fired sauna operations, visible emissions are concentrated in the first several minutes after lighting, before the firebox reaches steady-state temperature. That startup window is where opacity limits are typically exceeded, and it is where an electrostatic precipitator does the most work.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eParticulate removal:\u003c\/strong\u003e 70–95%, independently tested (OekoSolve published figure)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAppliance rating:\u003c\/strong\u003e wood-firing appliances under 50 kW\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChimney diameter:\u003c\/strong\u003e 130–300 mm (5.1″–11.8″), round or rectangular\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum flue gas temperature:\u003c\/strong\u003e 400 °C (752 °F) at the point of installation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower draw:\u003c\/strong\u003e 30 W maximum, under 1 W standby\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElectrical connection:\u003c\/strong\u003e standard appliance plug — no dedicated circuit or special wiring required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaintenance:\u003c\/strong\u003e brush-cleaned during routine chimney sweeping; no consumable filter media\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e designed and manufactured by OekoSolve AG, Switzerland\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eOekoTube Outside electrostatic precipitator unit\u003c\/li\u003e\n\u003cli\u003e8″ chimney T-section\u003c\/li\u003e\n\u003cli\u003eElectrode assembly and flue temperature sensor\u003c\/li\u003e\n\u003cli\u003eControl box with mounting hardware\u003c\/li\u003e\n\u003cli\u003eOekoSolve installation manual and technical literature\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eInstallation requirements — read before ordering\u003c\/h3\u003e\n\n\u003cp\u003e\u003cstrong\u003eThe tube must be installed vertically.\u003c\/strong\u003e The electrode is flexible and supported at one end only. Mounted horizontally, it contacts the flue wall, grounds out, and the unit will not function. This is a hard constraint, not a recommendation.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eShort chimneys can still be accommodated.\u003c\/strong\u003e On trailer-mounted and low-stack installations where vertical clearance for the full assembly is limited, the electrical control box can be mounted perpendicular to the flue and supported by a strap running to the sauna structure rather than hung off the T-section. The box weighs 5–7 lb and will not support itself off the T-section alone. This configuration carries a secondary benefit: with the control box off the flue, its electronics are no longer exposed to flue-wall temperature. We confirmed this approach directly with the North American distributor before deploying it in the field.\u003c\/p\u003e\n\n\u003cp\u003eTypical installation is approximately half a day and covers mounting the unit, installing and aligning the electrode assembly, fitting the temperature sensor and cover, and completing a startup review. Third-party installers in our network have quoted this work at roughly $750 where chimney access is normal. Roof or chimney repair, outlet installation, permits, and lift or scaffold access are separate.\u003c\/p\u003e\n\n\u003ch3\u003eCompatible with\u003c\/h3\u003e\n\n\u003cp\u003eAny wood-burning sauna stove under 50 kW venting through a 5.1″–11.8″ flue, including the IKI Mini, IKI Original, HUUM HIVE Wood, HUUM HIVE Flow, Harvia Legend, Harvia Pro and Harvia Duo. Confirm your flue diameter, available vertical clearance and measured flue-outlet temperature before ordering — we will do this with you.\u003c\/p\u003e\n\n\u003ch3\u003eWe'll decide together in your consult\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eFlue diameter, geometry, and T-section fit\u003c\/li\u003e\n\u003cli\u003eMeasured flue gas temperature at the outlet against the 400 °C limit — this matters on high-output stoves\u003c\/li\u003e\n\u003cli\u003eVertical clearance and whether a perpendicular control-box mount is required\u003c\/li\u003e\n\u003cli\u003eElectrical access at the stack and whether an electrician is needed\u003c\/li\u003e\n\u003cli\u003eFreight, installer coordination, and scheduling around your firing schedule\u003c\/li\u003e\n\u003cli\u003eDocumentation for your local air-quality authority\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eA note on compliance\u003c\/h3\u003e\n\n\u003cp\u003eWood smoke opacity is regulated at the state level, and thresholds and measurement methods vary — Texas, for example, is administered by TCEQ. This equipment reduces particulate emissions; it is your agency, not the manufacturer and not us, that determines whether a given installation meets a given standard. We will help you document what was installed and why. We will not tell you it guarantees an outcome we cannot measure on your site.\u003c\/p\u003e\n\n\u003cp\u003eSchedule a consultation with an advisor to confirm fit, freight, and installation for your specific stove and chimney.\u003c\/p\u003e","brand":"OekoSolve","offers":[{"title":"Equipment Only","offer_id":50059936465146,"sku":"OEKO-OUT-8","price":2990.0,"currency_code":"USD","in_stock":true},{"title":"Equipment + Install \u0026 Spec Support","offer_id":50059936497914,"sku":"OEKO-OUT-8-INSTALL","price":3990.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0820\/7083\/1354\/files\/OEKO-OUT-8.jpg?v=1787166086","url":"https:\/\/shop.contrastmarket.com\/products\/oekotube-outside-electrostatic-chimney-filter-for-wood-fired-saunas","provider":"Contrast Market","version":"1.0","type":"link"}