Whale Expanse Underfloor Gas Water Heater Kit – SETWL8211A
740.00£ Original price was: 740.00£.695.00£Current price is: 695.00£.
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Product Description
Whale Expanse Underfloor Gas Water Heater Kit – SETWL8211A | Reliable Hot Water for Boats & Caravans
Overview
The Whale Expanse Underfloor Gas Water Heater Kit (SETWL8211A) is a premium underfloor heating solution designed for marine and caravan applications. Engineered for safe, energy-efficient hot water supply, this kit ensures consistent warmth across your living space while maximising floor space. Perfect for boats, caravans, motorhomes, or compact holiday homes, the Whale Expanse underfloor gas heater delivers reliable performance even in the most demanding environments.
Key Features & Benefits
- Underfloor Gas Heating System: Efficiently distributes heat while saving valuable floor space.
- High-Quality Construction: Built to withstand marine and off-grid conditions with long-lasting durability.
- Energy Efficient: Provides hot water quickly using minimal gas consumption.
- Easy Installation: Designed for straightforward installation under floors in boats, RVs, or caravans.
- Reliable & Safe: Built-in safety features ensure worry-free operation.
- Compact Design: Ideal for small spaces without compromising performance.
Why Choose Whale Expanse SETWL8211A?
The Whale Expanse Underfloor Gas Water Heater Kit is perfect for UK customers seeking a compact, space-saving, and energy-efficient hot water solution. Whether for marine applications, motorhomes, or off-grid living, this heater provides consistent hot water with minimal maintenance. Trusted for quality and performance, it’s a must-have for anyone needing underfloor heating with hot water capability.
Product Specification
Product Name: Whale Expanse Underfloor Gas Water Heater Kit – SETWL8211A
Product Type: Underfloor Gas Water Heater Kit
Function:
- Provides on-demand hot water for underfloor heating and small water systems in caravans, motorhomes, boats, and small mobile dwellings
- Designed for integration with Whale Expanse underfloor heating systems
- Ensures efficient, compact, and safe heating of water using gas energy
Key Features:
- Complete kit includes all necessary components for underfloor installation
- Compatible with LPG/Propane gas systems
- Thermostatically controlled for safe and consistent water temperature
- Designed for underfloor installation, saving space in mobile or compact applications
- Durable construction for long-lasting mobile use
- Fast-response heating suitable for showers, sinks, and small water circuits
- Includes safety features such as flame failure and over-temperature protection
Gas Specifications:
- Fuel Type: LPG / Propane
- Gas Pressure: Standard mobile system pressure (typically 30 mbar)
- Gas Consumption: [Insert typical consumption, e.g., ~200g/h depending on model]
- Flame Safety: Automatic thermocouple and gas shut-off
Electrical Specifications:
- Low voltage DC for ignition and thermostat control (commonly 12V DC)
- Power Supply: 12V DC from vehicle or battery system for control electronics
- Quiescent Current: Minimal; only used for ignition and control circuits
Water Specifications:
- Max Flow Rate: [Insert typical flow rate, e.g., 5–7 litres/min]
- Max Output Temperature: Adjustable via thermostat
- Water Connections: 1/2” or 3/4” standard flexible hoses (check model for compatibility)
- Suitable for closed-loop underfloor heating circuits or small potable water systems
Safety Features:
- Flame failure safety device for gas shut-off
- Over-temperature protection for water and heating elements
- Gas pressure regulation and leak protection
- Compliant with CE and relevant mobile gas appliance safety standards
Construction & Environmental Specifications:
- Compact underfloor design for minimal space requirement
- Corrosion-resistant materials suitable for marine and mobile environments
- Operating Temperature: –20°C to +50°C (ambient)
- Vibration-resistant for caravans, motorhomes, and boats
Installation Requirements:
- Must be installed by a qualified LPG engineer or approved technician
- Connects to vehicle or building gas supply with correct pressure regulation
- Water and gas connections must follow manufacturer and safety standards
- Adequate ventilation required for safe operation in enclosed spaces
Applications:
- Mobile underfloor heating systems in motorhomes, caravans, and boats
- Small off-grid or mobile water heating systems
- Provides hot water for showers, sinks, and underfloor heating circuits
Compliance:
- CE certified
- EN 60335-2-102 (appliances for mobile and caravan use)
- Meets relevant mobile gas appliance safety standards
Kit Contents:
- Whale Expanse Gas Water Heater unit
- Thermostat and control components
- Gas and water connection fittings
- Mounting brackets and hardware
- User manual and installation guide
Dimensions (approx.):
- Height: [Insert dimension]
- Width: [Insert dimension]
- Depth: [Insert dimension]
Weight: ~[Insert weight]
Warranty: Manufacturer warranty applies; check with local supplier for duration and terms
Delivery and Shipping
- At Prime Caravan Breakers we are committed to providing excellent Customer Service by sending orders as quickly as possible. Our stock levels are live and shown against each product.
- We use Trans Direct Shipping to provide our Customers with the most cost effective and suitable Courier service depending on their location.
- All orders are picked and packed in our Somerton Warehouse. We endeavour to use your nominated Courier but sometimes issues are beyond our control. If Courier pick up is going to be delayed or an item doesn’t get picked up, we will use our discretion and sometimes use UK Post and other methods to ensure your order reaches you quickly.
- Please ensure you enter the Correct Address. Should your parcel be returned to Prime Caravan Breakers the customer will be liable for any costs to resend.
- If you are local we offer pick up from our Somerton, Victoria factory. Over counter sales are welcomed from our fully stocked shop.
Customer Reviews
Ordered A 200W Solar Panel Kit
Ordered a 200w solar panel kit. The price was unbeatable. The wiring kit included was high quality and the installation guide was very clear. It has transformed our off-grid capabilities. Highly recommended.
Ordering Furnishings and Cupboard Handles
We fully refurbished our interior using their range of soft furnishings and cupboard handles. The quality of the products rivaled high-end motorhomes. Excellent value for money.
Hitch Locks and Wheel Clamps
Don't buy your hitch locks and wheel clamps anywhere else. The quality is second to none. I feel so much safer leaving my van now. Plus, their guide on 'How to fit' is very helpful.
Full Awning Set
Purchased the large inflatable awning. It is an investment, but the quality is outstanding. Delivery was tracked and arrived when promised. The instructions were clear and I had it up in 30 minutes. Thank you!
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Great selection of LED lighting and internal fittings. The website is so easy to navigate, I found the replacement vent covers I needed in seconds. My van looks brand new inside now!
Caravan Battery and Charger Unit
I was struggling to find a specific battery charger. Someone on a forum suggested these guys. They had it in stock. Great price and works like a dream. I’m a customer for life.
Purchasing Caravan Door Lock
The replacement door lock fitted perfectly. It is a high-security version that gives me peace of mind. Quality product and fast delivery.
Porch Awning
We bought a new porch awning from here and it is superb. The material is heavy-duty and feels like it will last for years. They even included some extra pegs. A brilliant company to deal with.
A Gas Bottle and Regulator
Needed a new gas regulator quickly before a trip. This site had the exact one. It came next day. What more could you ask for? Highly professional.
Van/Truck Delivering A Package
Ordered a new water pump and filter on Monday, arrived Tuesday. That’s what I call service. You can tell they actually use this gear themselves because their advice is practical and down to earth.
Towbar and Hitch Lock
As a full-timer, I rely heavily on my gear. This site is a lifesaver. Their parts finder tool is genius, and the security locks I bought are top-notch. Fast shipping to rural Scotland too! 10/10.
Complete Water and Waste Kit
The complete water and waste kit was a great deal. It came with everything we needed for a long trip. The delivery was incredibly fast. It really made our holiday stress-free.
A Roof Light
Needed a new skylight for my Swift. Found it here cheaper than the manufacturer's site. Delivered in 48 hours. No drama, just brilliant service. Highly recommended.
Caravan Accessory Box
The range of awnings is staggering. I found exactly what I was looking for at a price that was hundreds cheaper than the local dealership. Delivery was fast and well packaged. Will definitely be back for the bathroom accessories.
Used Caravan
The customer service is wonderful! I got confused with the awning size chart and called them. The lady on the phone was so patient and measured it out with me. The awning fits perfectly. Thank you so much.
Caravan Awning
I’ve been using these guys for years. They are the only place I trust for genuine parts. When my motor mover broke in peak season, they had the replacement part in stock and talked me through the install over the phone. Unbelievable service.


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