{"product_id":"huum-steel-mini-series-4-stainless-steel-wall-mount-3-5kw-sauna-heater-with-digital-controller-sauna-stones-sak91573","title":"STEEL SERIES MINI 4 | Wall Mount Sauna Heater With Digital Control \u0026 Stones | By Huum","description":"\u003cstyle\u003e\n.fw-wrap{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Helvetica,sans-serif;max-width:820px;margin:0 auto;padding:1.5rem 0;color:#ffffff}\n.fw-sku{font-size:15px;letter-spacing:.04em;text-transform:uppercase;color:#c8a254 !important;margin:0 0 14px;font-weight:800;line-height:1.5}\n.fw-intro{font-size:14px;line-height:1.85;color:#b0b8cc;margin:0 0 12px}\n.fw-ritual{font-size:14px;color:#c8a254;font-style:italic;padding:10px 0 10px 14px;border-left:3px solid #c8a254;margin:0 0 1.5rem;background:rgba(200,162,84,.06);border-radius:0 6px 6px 0}\n.fw-badges{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:1.5rem}\n.fw-badge{font-size:11px;padding:4px 12px;border-radius:20px;border:1px solid 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strong{color:#ffffff;font-weight:600}\n.fw-spec-table{width:100%;border-collapse:collapse;font-size:13px;margin-top:14px}\n.fw-spec-table tr{border-bottom:1px solid rgba(255,255,255,.06)}\n.fw-spec-table tr:last-child{border-bottom:none}\n.fw-spec-table td{padding:9px 4px;vertical-align:top}\n.fw-spec-table td:first-child{color:#8892a8;width:46%;text-transform:uppercase;font-size:11px;letter-spacing:.04em;font-weight:500;padding-top:11px}\n.fw-spec-table td:last-child{color:#ffffff;font-weight:500}\n.fw-warranty-box{background:rgba(76,175,125,.05);border:1px solid rgba(76,175,125,.25);border-radius:10px;padding:14px 16px;margin-top:14px}\n.fw-warranty-title{font-size:11px;font-weight:700;color:#4caf7d;text-transform:uppercase;letter-spacing:.07em;margin-bottom:8px}\n.fw-warranty-text{font-size:12px;color:#8892a8;line-height:1.7}\n.fw-shipping-box{background:rgba(200,162,84,.06);border:1px solid rgba(200,162,84,.2);border-radius:10px;padding:16px 18px;margin-top:14px}\n.fw-shipping-box p{font-size:13px;color:#c8a254;margin:0;line-height:1.7}\n.fw-closing{text-align:center;padding:2rem 0 1rem;border-top:1px solid rgba(255,255,255,.08);margin-top:2rem}\n.fw-closing-ritual{font-size:13px;color:#8892a8;margin-bottom:10px;line-height:1.8}\n.fw-closing-tagline{font-size:14px;font-weight:700;color:#c8a254;text-transform:uppercase;letter-spacing:.06em;margin:0}\n@media(max-width:540px){.fw-cap-grid{grid-template-columns:repeat(2,1fr)}.fw-vs-grid{grid-template-columns:1fr}.fw-duct-callout{flex-direction:column}}\n\u003c\/style\u003e\n\n\u003cdiv id=\"fw-steel-mini4\" class=\"fw-wrap\"\u003e\n\n\u003cp class=\"fw-sku\"\u003eHUUM Steel Mini 4 · 3.5 kW Wall-Mount · 133 lbs Stones · Internal Air Duct · 25% Faster Heat-Up · Short Safety Distances · 5-Year Warranty · Made In Estonia\u003c\/p\u003e\n\n\u003cdiv class=\"fw-badges\"\u003e\n  \u003cspan class=\"fw-badge\"\u003eWall-Mounted\u003c\/span\u003e\n  \u003cspan class=\"fw-badge\"\u003e3.5 kW\u003c\/span\u003e\n  \u003cspan class=\"fw-badge\"\u003eHigh-Grade Stainless Steel\u003c\/span\u003e\n  \u003cspan class=\"fw-badge amber\"\u003e🪨 133 lbs Stone Capacity\u003c\/span\u003e\n  \u003cspan class=\"fw-badge blue\"\u003e💨 Internal Air Duct — 25% Faster Heat-Up\u003c\/span\u003e\n  \u003cspan class=\"fw-badge\"\u003eDirect Stone-to-Element Contact\u003c\/span\u003e\n  \u003cspan class=\"fw-badge\"\u003eExceptionally Short Safety Distances\u003c\/span\u003e\n  \u003cspan class=\"fw-badge green\"\u003e🛡️ 5-Year Limited Warranty\u003c\/span\u003e\n  \u003cspan class=\"fw-badge blue\"\u003e🇪🇪 Made In Estonia\u003c\/span\u003e\n\u003c\/div\u003e\n\n\u003cp class=\"fw-intro\"\u003eThe HUUM Steel Mini 4 is a 3.5 kW wall-mounted stainless steel sauna heater engineered specifically for compact sauna spaces. Exceptionally short safety distances mean it installs cleanly where a larger heater won't fit. Despite the compact form, 133 lbs of stones in direct element contact produces longer, milder, more consistent heat than its size suggests. The internal air duct delivers heat-up times 25% faster than conventional heaters of equivalent output. Made in Estonia. 5-year limited warranty.\u003c\/p\u003e\n\n\u003cp class=\"fw-ritual\"\u003e3.5 kW. 133 lbs of stone. 25% faster heat-up. The HUUM Steel Mini 4 — compact space, no compromise on the sauna experience. 🌿\u003c\/p\u003e\n\n\u003cdiv class=\"fw-duct-callout\"\u003e\n  \u003cdiv class=\"fw-duct-callout-icon\"\u003e💨\u003c\/div\u003e\n  \u003cdiv\u003e\n    \u003cdiv class=\"fw-duct-callout-title\"\u003eInternal Air Duct — 25% Faster Heat-Up In A Compact Form\u003c\/div\u003e\n    \u003cdiv class=\"fw-duct-callout-text\"\u003eThe Steel Mini 4 carries the same internal air duct technology as the full HUUM Steel Series. Airflow channelled through the heater internals improves convective heat transfer through the stone mass — reducing time-to-temperature by up to 25% compared to conventional heaters. In a compact sauna where faster heat-up is a daily convenience, this makes a meaningful practical difference every session.\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"fw-cap-grid\"\u003e\n  \u003cdiv class=\"fw-cap-card\"\u003e\n    \u003cdiv class=\"fw-cap-icon\"\u003e⚡\u003c\/div\u003e\n    \u003cdiv class=\"fw-cap-label\"\u003eOutput\u003c\/div\u003e\n    \u003cdiv class=\"fw-cap-value\"\u003e3.5 kW\u003c\/div\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"fw-cap-card\"\u003e\n    \u003cdiv class=\"fw-cap-icon\"\u003e🪨\u003c\/div\u003e\n    \u003cdiv class=\"fw-cap-label\"\u003eStone Capacity\u003c\/div\u003e\n    \u003cdiv class=\"fw-cap-value\"\u003e133 lbs\u003c\/div\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"fw-cap-card\"\u003e\n    \u003cdiv class=\"fw-cap-icon\"\u003e💨\u003c\/div\u003e\n    \u003cdiv class=\"fw-cap-label\"\u003eHeat-Up Speed\u003c\/div\u003e\n    \u003cdiv class=\"fw-cap-value\"\u003e25% Faster\u003c\/div\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"fw-cap-card\"\u003e\n    \u003cdiv class=\"fw-cap-icon\"\u003e🛡️\u003c\/div\u003e\n    \u003cdiv class=\"fw-cap-label\"\u003eWarranty\u003c\/div\u003e\n    \u003cdiv class=\"fw-cap-value\"\u003e5 Years\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cp style=\"font-size:11px;font-weight:700;color:#c8a254;letter-spacing:.1em;text-transform:uppercase;margin:0 0 10px\"\u003eHUUM Steel Range — Mini vs Full Series\u003c\/p\u003e\n\u003cdiv class=\"fw-vs-grid\"\u003e\n  \u003cdiv class=\"fw-vs-card active\"\u003e\n    \u003cdiv class=\"fw-vs-label\"\u003e✅ This Model — Compact\u003c\/div\u003e\n    \u003cdiv class=\"fw-vs-name\"\u003eSteel Mini 4\u003c\/div\u003e\n    \u003cdiv class=\"fw-vs-sub\"\u003e3.5 kW · Wall-mount · 133 lbs · Short safety distances · Compact sauna specialist\u003c\/div\u003e\n    \u003cspan class=\"fw-vs-badge\"\u003eCompact · 3.5 kW\u003c\/span\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"fw-vs-card alt\"\u003e\n    \u003cdiv class=\"fw-vs-label\"\u003eAlso Available — Full Series\u003c\/div\u003e\n    \u003cdiv class=\"fw-vs-name\"\u003eSteel Series\u003c\/div\u003e\n    \u003cdiv class=\"fw-vs-sub\"\u003eHigher kW range · Larger stone capacity · UKU + Stones included · Larger room coverage\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003chr class=\"fw-divider\"\u003e\n\n\u003c!-- FEATURES --\u003e\n\u003cdiv class=\"fw-acc-wrap\"\u003e\n  \u003cbutton data-fw=\"features\" class=\"fw-acc-header\"\u003e\n    \u003cspan class=\"fw-acc-title\"\u003e\u003cspan class=\"fw-acc-icon\"\u003e⚡\u003c\/span\u003e Key Features\u003c\/span\u003e\n    \u003cspan id=\"fwc-features\" class=\"fw-acc-chevron\"\u003e▼\u003c\/span\u003e\n  \u003c\/button\u003e\n  \u003cdiv id=\"fwb-features\" class=\"fw-acc-body\"\u003e\n    \u003cdiv class=\"fw-feature-row\"\u003e\n      \u003cspan class=\"fw-feature-emoji\"\u003e💨\u003c\/span\u003e\n      \u003cspan class=\"fw-feature-text\"\u003e\u003cstrong\u003eInternal air duct — 25% faster heat-up\u003c\/strong\u003e — the same duct technology as the full Steel Series. Channels airflow through the heater internals, improving convective heat distribution and reaching session temperature up to 25% faster. A meaningful daily convenience in a compact sauna.\u003c\/span\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"fw-feature-row\"\u003e\n      \u003cspan class=\"fw-feature-emoji\"\u003e🪨\u003c\/span\u003e\n      \u003cspan class=\"fw-feature-text\"\u003e\u003cstrong\u003e133 lbs stone capacity — direct element contact\u003c\/strong\u003e — generous for a 3.5 kW compact heater. Direct stone-to-element contact maximises heat transference, producing longer-lasting heat retention and more abundant steam throughout the session.\u003c\/span\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"fw-feature-row\"\u003e\n      \u003cspan class=\"fw-feature-emoji\"\u003e📐\u003c\/span\u003e\n      \u003cspan class=\"fw-feature-text\"\u003e\u003cstrong\u003eExceptionally short safety distances — compact sauna specialist\u003c\/strong\u003e — minimal clearance requirements make the Mini 4 the right choice for saunas where bench layout and wall proximity leave little installation room. Installs cleanly without compromising the usable interior.\u003c\/span\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"fw-feature-row\"\u003e\n      \u003cspan class=\"fw-feature-emoji\"\u003e🧱\u003c\/span\u003e\n      \u003cspan class=\"fw-feature-text\"\u003e\u003cstrong\u003eWall-mounted — 3.5 kW\u003c\/strong\u003e — preserves all floor space. Output matched to compact sauna volumes — brings a small sauna to temperature quickly without oversizing the heater for the space.\u003c\/span\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"fw-feature-row\"\u003e\n      \u003cspan class=\"fw-feature-emoji\"\u003e🏗️\u003c\/span\u003e\n      \u003cspan class=\"fw-feature-text\"\u003e\u003cstrong\u003eHigh-grade stainless steel — industrial-quality elements — 5-year warranty\u003c\/strong\u003e — built for reliable long-term performance in regular daily use. 5-year limited warranty — the strongest coverage in the FR33DOM compact heater range.\u003c\/span\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"fw-feature-row\"\u003e\n      \u003cspan class=\"fw-feature-emoji\"\u003e🇪🇪\u003c\/span\u003e\n      \u003cspan class=\"fw-feature-text\"\u003e\u003cstrong\u003eMade in Estonia\u003c\/strong\u003e — manufactured to HUUM's precision engineering standards. The same production quality applied across the full HUUM range.\u003c\/span\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003c!-- SPECIFICATIONS --\u003e\n\u003cdiv class=\"fw-acc-wrap\"\u003e\n  \u003cbutton data-fw=\"specs\" class=\"fw-acc-header\"\u003e\n    \u003cspan class=\"fw-acc-title\"\u003e\u003cspan class=\"fw-acc-icon\"\u003e📐\u003c\/span\u003e Specifications\u003c\/span\u003e\n    \u003cspan id=\"fwc-specs\" class=\"fw-acc-chevron\"\u003e▼\u003c\/span\u003e\n  \u003c\/button\u003e\n  \u003cdiv id=\"fwb-specs\" class=\"fw-acc-body\"\u003e\n    \u003ctable class=\"fw-spec-table\"\u003e\n      \u003ctr\u003e\n\u003ctd\u003eBrand \/ Model\u003c\/td\u003e\n\u003ctd\u003eHUUM — Steel Mini 4\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eManufacturing\u003c\/td\u003e\n\u003ctd\u003eMade in Estonia\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eWall-mounted\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eOutput\u003c\/td\u003e\n\u003ctd\u003e3.5 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003eHigh-grade stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eHeating Elements\u003c\/td\u003e\n\u003ctd\u003eIndustrial-quality — direct stone contact\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eAir Duct\u003c\/td\u003e\n\u003ctd\u003eInternal — 25% faster heat-up\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eStone Capacity\u003c\/td\u003e\n\u003ctd\u003e133 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSafety Distances\u003c\/td\u003e\n\u003ctd\u003eExceptionally short — compact sauna compatible\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e5-year limited warranty\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/table\u003e\n    \u003cdiv class=\"fw-warranty-box\"\u003e\n      \u003cdiv class=\"fw-warranty-title\"\u003e🛡️ 5-Year Limited Warranty\u003c\/div\u003e\n      \u003cdiv class=\"fw-warranty-text\"\u003eThe HUUM Steel Mini 4 carries a 5-year limited warranty — among the strongest in the FR33DOM heater range. Contact us for full warranty terms and conditions.\u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003c!-- SHIPPING --\u003e\n\u003cdiv class=\"fw-acc-wrap\"\u003e\n  \u003cbutton data-fw=\"shipping\" class=\"fw-acc-header\"\u003e\n    \u003cspan class=\"fw-acc-title\"\u003e\u003cspan class=\"fw-acc-icon\"\u003e🚚\u003c\/span\u003e Shipping \u0026amp; Delivery\u003c\/span\u003e\n    \u003cspan id=\"fwc-shipping\" class=\"fw-acc-chevron\"\u003e▼\u003c\/span\u003e\n  \u003c\/button\u003e\n  \u003cdiv id=\"fwb-shipping\" class=\"fw-acc-body\"\u003e\n    \u003cdiv class=\"fw-shipping-box\"\u003e\n      \u003cp\u003e🚚 Delivery estimated within 10 business days. Shipping costs calculated at checkout.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"fw-closing\"\u003e\n  \u003cp class=\"fw-closing-ritual\"\u003e⚡ 3.5 kW · 🪨 133 lbs Stones · 💨 25% Faster Heat-Up · 🧱 Wall-Mount · 📐 Short Safety Distances · 🛡️ 5-Year · 🇪🇪 Estonia\u003c\/p\u003e\n  \u003cp class=\"fw-closing-tagline\"\u003eHUUM Steel Mini 4 — Compact Space. Full HUUM Performance. 🔥\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e\n\n\u003cscript\u003e\ndocument.addEventListener('click',function(e){\n  var btn=e.target.closest('[data-fw]');\n  if(!btn)return;\n  var id=btn.getAttribute('data-fw');\n  var body=document.getElementById('fwb-'+id);\n  var chev=document.getElementById('fwc-'+id);\n  if(!body||!chev)return;\n  var isOpen=body.classList.contains('open');\n  body.classList.toggle('open',!isOpen);\n  chev.classList.toggle('open',!isOpen);\n});\n\u003c\/script\u003e","brand":"HUUM","offers":[{"title":"3.5 (UP TO 212 CF)","offer_id":48857381863576,"sku":"H1007012","price":3099.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0741\/8190\/2488\/files\/huum-steel-mini-4-stainless-steel-wall-mount-3-5kw-sauna-heater-38-4-inches-front-view-sak91573.jpg?v=1775605979","url":"https:\/\/fr33domwellness.com\/products\/huum-steel-mini-series-4-stainless-steel-wall-mount-3-5kw-sauna-heater-with-digital-controller-sauna-stones-sak91573","provider":"FR33DOM WELLNESS","version":"1.0","type":"link"}