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The TimberIN Nordic External\u2122<\/strong> is a professional-grade external wood-fired hot tub heater<\/strong>, engineered for fast, reliable water heating and long-term outdoor use. By mounting the heater outside the tub<\/strong>, you preserve internal space while gaining easier access for loading, cleaning, and maintenance.<\/p>\n This model is available in three power variants<\/strong>, each designed for a specific water volume:<\/p>\n 22 kW<\/strong> \u2013 ideal for hot tubs up to 1,000 litres<\/strong><\/p>\n<\/li>\n 28 kW<\/strong> \u2013 suitable for 1,000\u20131,500 litres<\/strong><\/p>\n<\/li>\n 40 kW<\/strong> \u2013 recommended for large hot tubs above 1,500 litres<\/strong><\/p>\n<\/li>\n<\/ul>\n Selecting the correct output ensures faster heating, better fuel efficiency, and stable water temperature.<\/p>\n External stainless-steel heater body<\/p>\n<\/li>\n Optimised combustion chamber for efficient heat transfer<\/p>\n<\/li>\n Glass fire door for flame visibility and combustion control<\/p>\n<\/li>\n Integrated ash drawer for easy cleaning<\/p>\n<\/li>\n Standard \u00d8129 mm flue<\/strong> connection<\/p>\n<\/li>\n G1\/2″ water connections for hot tub circulation<\/p>\n<\/li>\n<\/ul>\n Keeps tub interior free from bulky heaters<\/p>\n<\/li>\n Safer and easier firewood loading<\/p>\n<\/li>\n Flexible positioning next to the tub<\/p>\n<\/li>\n Ideal for retrofits and new installations<\/p>\n<\/li>\n No electricity required<\/p>\n<\/li>\n<\/ul>\n The TimberIN Nordic External\u2122<\/strong> is the ideal solution for customers seeking authentic wood-fired heating with modern efficiency and robust European construction.<\/p>\n\ud83d\udd25 Choose the Right Power Output<\/h3>\n
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\u2699\ufe0f Engineered for Performance<\/h3>\n
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\ud83e\udeb5 Why Choose an External Wood-Fired Heater?<\/h3>\n
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TimberIN Nordic External\u2122 \u2013 Model Comparison<\/h2>\n
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\n Specification<\/th>\n 22 kW<\/strong><\/th>\n 28 kW<\/strong><\/th>\n 40 kW<\/strong><\/th>\n<\/tr>\n<\/thead>\n\n \n Model code<\/td>\n BFTS-50<\/td>\n BFTS-75<\/td>\n BFTS-100<\/td>\n<\/tr>\n \n Power output<\/td>\n 22 kW<\/td>\n 28 kW<\/td>\n 40 kW<\/td>\n<\/tr>\n \n Recommended water volume<\/td>\n Up to 1,000 L<\/td>\n 1,000\u20131,500 L<\/td>\n 1,500 L+<\/td>\n<\/tr>\n \n Heater type<\/td>\n External wood-fired<\/td>\n External wood-fired<\/td>\n External wood-fired<\/td>\n<\/tr>\n \n Installation<\/td>\n Outside hot tub<\/td>\n Outside hot tub<\/td>\n Outside hot tub<\/td>\n<\/tr>\n \n Combustion chamber length<\/td>\n 45 cm<\/td>\n 42 cm<\/td>\n 57 cm<\/td>\n<\/tr>\n \n Overall length<\/td>\n 62 cm<\/td>\n 87 cm<\/td>\n 102 cm<\/td>\n<\/tr>\n \n Width<\/td>\n 40 cm<\/td>\n 40 cm<\/td>\n 40 cm<\/td>\n<\/tr>\n \n Height<\/td>\n 67 cm<\/td>\n 67 cm<\/td>\n 67 cm<\/td>\n<\/tr>\n \n Flue diameter<\/td>\n \u00d8129 mm<\/td>\n \u00d8129 mm<\/td>\n \u00d8129 mm<\/td>\n<\/tr>\n \n Material<\/td>\n Stainless steel<\/td>\n Stainless steel<\/td>\n Stainless steel<\/td>\n<\/tr>\n \n Door<\/td>\n Glass fire door<\/td>\n Glass fire door<\/td>\n Glass fire door<\/td>\n<\/tr>\n \n Ash drawer<\/td>\n Yes<\/td>\n Yes<\/td>\n Yes<\/td>\n<\/tr>\n \n Connection<\/td>\n G1\/2″<\/td>\n G1\/2″<\/td>\n G1\/2″<\/td>\n<\/tr>\n \n Best for<\/td>\n Small tubs<\/td>\n Medium tubs<\/td>\n Large tubs \/ fast heating<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n