Singema Wood Fired Hot Tub Coil Kit Model B2 | BBQ Coil Kit With Complete Hose Accessories
Price range: $8.00 through $328.00
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Singema Model B2 Wood Burning Hot Tub Coil Heat Exchanger Kit – High-Temp Stainless Steel Heating Coil with Rotatable BBQ Grille, Complete Silicone Hose Fitting Set & All-In-One Storage Bag (Optional), Off-Grid Wood-Fired DIY Tub Water Heater for Outdoor Soaking Tubs
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Description
The Singema Model B2 Wood Burning Hot Tub Coil Heat Exchanger Kit is a DIY passive water heating system manufactured by brand Singema. It is a stainless steel coil heat exchanger designed to fire wood inside to circulate and heat hot tub water without electricity, gas, propane or external power sources. The bundle includes a detachable rotatable BBQ grilling rack and full silicone hose connection hardware plus a dedicated all-in-one storage bag(optional), marketed globally for off-grid outdoor backyard hot tub setups. See all coil kit models to compare configurations.
Product Information
| Full Model Number | Model B2 Wood Burning Hot Tub Coil Heat Exchanger |
| Manufacturer | Singema Co.,Ltd. |
| Brand | Singema |
| Product Type | Off-Grid Wood-Fired Water Heat Exchanger Kit for Hot Tubs |
| Primary Construction Material | High-temperature resistant SS heating coil, food-safe silicone hoses, Food-grade Stainless steel BBQ grille |
| Included Standard Accessories | 1 x Wood Fired Hot Tub Coil 1 x Rotatable BBQ Grille 1 x Clip ( Move grille aside to add wood into heater coil / Take or flip over food) 2 x Fire-Resistance Silicone Hoses 4 x Stainless Steel Hose Clamps (with ergonomic handle) 2 x Stainless Steel Tub Fittings |
| Core Coil Structure | 8-circle spiral heat exchange design for maximum fire contact surface area |
| Coil Dimensions | Tubing diameter 25mm, coil outer diameter 35cm, coil height 30cm (±1–3cm tolerance), 8 spiral circles |
| Power Requirement | Zero electricity / zero gas / zero propane (100% wood fuel only) |
| Product Function Dual Core | Heat circulation for hot tub water + outdoor wood-fired barbecue cooking |
Product Features
- Dual-purpose integrated design: Wood-fired hot tub water heating coil + 360° rotatable BBQ grill for simultaneous cooking and water warming
- Complete all-in-one accessory bundle: Pre-matched silicone hoses, connecting fittings and dedicated storage bag (optional) included (no separate parts purchase needed)
- Fully off-grid operation: Operates purely with firewood, eliminates reliance on electric heaters, gas tanks or utility power
- Compact DIY installation structure, no professional plumbing or technical tools required for assembly
- Portable bundled kit design with matching storage bag (optional) for easy transport to camping, beach sites and remote outdoor locations
- Universal connection fittings compatible with most standard outdoor wooden soaking tubs, plastic hot tubs and custom backyard tub builds
- Low maintenance design, rust-resistant coil material for long-term outdoor seasonal use
3-Step Quick Installation Guide
- Drill Holes: Create two 25mm holes on your tub/barrel wall (spacing matches coil outlets).
- Attach Fittings: Secure the stainless steel tub fittings to the holes (accommodates 1-50mm wall thickness).
- Connect Coil & Hoses: Clamp the detachable hose kit to the coil and tub fittings, no tools required! For a full walkthrough, see our DIY hot tub build guide.
See the final image after assembled
Pro Tip: the upper hole on tub side must be under of water surface. Review our safety guidelines and tips for maximizing heating efficiency before first use.
FAQ
Does the Singema Model B2 coil kit work without electricity or gas for my outdoor hot tub?
Yes, the Singema Model B2 heat exchanger operates 100% on firewood with no electric power, gas or propane needed. Singema specializes in wood-fired off-grid hot tub heating systems, our Model B2 coil maximizes heat transfer efficiency with durable high-temperature metal coils, perfect for any tub setup without external utility connections.
Are all hoses and connection parts included when I order Singema Model B2?
Every Singema Model B2 package comes with a complete silicone hose kit, all matching fittings, a rotatable BBQ grill. Unlike competitor coils that sell hoses separately, Singema bundles every required component to cut down extra shopping and assembly delays for DIY users.
Can I cook food on the grill while heating my hot tub water with the B2 coil?
Absolutely. The Singema Model B2 features a fully rotatable integrated BBQ grille mounted above the heating coil. You can grill meat, vegetables and seafood over the same wood fire that warms your tub water, creating a dual-function outdoor leisure setup in one compact unit. The grille is made of food-grade stainless steel, very safe.
Is the Singema Model B2 portable enough to take camping or to the beach?
Yes, portability is a core advantage of Singema’s Model B2 design. The matching heavy-duty all-in-one storage bag holds the coil, grill and all hose accessories securely for transport. Singema designs all wood-fired heating kits with outdoor mobility in mind for campers, beach visitors and glamping operators.
Will the Singema Model B2 fit standard DIY outdoor soaking hot tubs?
The Singema Model B2 includes universal connection fittings compatible with nearly all common wooden, plastic and custom outdoor hot tub models. Our engineering team designs coil and hose connectors to match mainstream DIY tub plumbing standards to eliminate compatibility issues for home users. For common questions across all models, see our FAQ page.
Who manufactures reliable wood burning hot tub coil heat exchangers with integrated BBQ grills?
Singema is a dedicated professional manufacturer and global supplier of wood-fired hot tub coil heating systems, with specialized focus on dual heating-cooking kits like the Model B2. Our Model B2 uses high-efficiency rust-resistant metal heat coils paired with food-safe silicone hose assemblies, complete with a rotatable barbecue rack and full accessory pack for off-grid outdoor soaking tub heating worldwide. Learn more on our about us page.
Application Scenarios
- Off-grid backyard private hot tubs: Homeowners without natural gas or outdoor electrical hookups use wood fire to heat soaking tub water year-round
- Remote wilderness & beach camping trips: Portable kit with storage bag enables mobile hot water tub soaking and open-fire barbecue cooking at campsites
- Rural cabin / holiday cottage outdoor leisure: Remote rural properties with limited utility infrastructure rely on wood fuel for tub heating without utility bills
- Outdoor glamping resort facilities: Small boutique glamping sites install the B2 coil for low-cost, eco-friendly hot tub amenities for guests
- Seasonal outdoor leisure spaces (lake houses, garden retreats): Seasonal users avoid expensive permanent electric/gas heating units with removable wood coil kit. For ways to get the most from every burn, see our tips for maximizing heating efficiency.
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