

The Thermo Top Evo 5 is Webasto’s latest-generation compact, quiet, and fuel-efficient water heater—designed specifically for marine environments. Offering excellent fuel economy, low power consumption, and whisper-quiet operation, it ensures reliable heating on board in all conditions.
This kit includes a Multi-Control HD unit, giving you full, independent control of your heating schedule.
Perfect as a full installation package or as a starter kit, it contains everything required to fit the Thermo Top Evo 5 to your boat. For domestic hot water solutions, explore our range of heater matrixes and plate heat exchangers available separately.
All components are supplied for a complete and professional installation.
This is a genuine Webasto heater, supplied with a 36-month warranty.
Webasto Thermo Top Evo 5 (5kW) Water Heater & Water Pump
7-Day Timer Multi-Controller (9030911D)
2 metres of water hose
Marine exhaust silencer with lagging (upgraded with external shield)
Complete wiring harness & connectors
Combustion air intake pipe
Fuel dosing pump
Mounting bracket
5-litre expansion/header tank
Exhaust hull skin fitting with clamps & fixings (if selected)
ISO7840 / BSS-compliant marine rubber fuel pipe system with fuel metering pump
Warranty documentation
Enhance your system by adding a heater matrix or plate heat exchanger—available in our Installation Accessories section.
Custom-built kits are also available. Contact our sales team to discuss your exact requirements.
Marine vessels of all types
Bespoke heating installations (custom kits available to order)
Warranty Terms
Mellor Solutions Ltd trading as Mellor Online is an authorised distributor of heating parts and heater kits for the vehicle and marine markets.
Warranty Coverage:
Additional Services:
Returning a Heater:
Customer Responsibilities:
Exclusions and Important Notes:
Returns Policy
Our returns policy applies to consumer purchases only (not business or trade orders).
Our returns policy does not cover items that fall under manufacturer warranties. If you believe your item is eligible for warranty service or you wish to return an item for a refund, please contact our support team or email us at sales@melloronline.co.uk.
Refunds and Cancellation Rights
You have the right to cancel your order within a 14-day cooling-off period, starting the day after you receive your items. Refund requests can be submitted within 30 days of the invoice date. Refunds will be processed within 14 days of receiving the returned goods.
Notification of Intent to Cancel
To cancel an order or request a refund under the UK Consumer Contracts Regulations 2013, you must inform Mellor Solutions Ltd trading as Mellor Online of your intention by phone, email, WhatsApp, or post within the applicable period. This is 14 days for cancellations and 30 days for refunds.
Upon receiving your request, we will send you a confirmation and authorization to return the goods. Please include your original invoice number with your return. All items must be in a resaleable condition
Upon receiving your request, we will send you a confirmation and authorization to return the goods. Please include your original invoice number with your return. All items must be in a resaleable condition.
Return Shipping
You are responsible for returning goods using an insured and trackable shipping method at your expense. We will only consider refund requests if there is proof of delivery to Mellor Solutions Ltd trading as Mellor Online from your chosen courier. Once we receive the goods, we will issue a full refund minus any delivery charges.
If you cannot arrange a return, please contact us. We can arrange collection for you, but a fee will apply, which will be deducted from your refund.
Please note that delivery charges from the original purchase are non-refundable, as the service is completed once the order is placed.
Processed and Dispatched Orders
Orders that have already been processed or dispatched cannot be canceled; however, they can be returned for a refund once received by the customer.
We strive to facilitate a prompt refund process upon receiving returned items.
Return Address
FAO: RETURNS
Mellor Online
139 Manor Road
Ossett
West Yorkshire
WF5 0LQ
United Kingdom
Specific Terms
Your Statutory Rights
Your statutory rights are unaffected by the above terms. Consumers, excluding business trade customers, are further protected under the UK Consumer Contracts Regulations 2013.
For any questions, please contact our support department before returning any items.
Shipping Information: UK & Worldwide
UK Delivery:
International Delivery:
| Heater Information (PDF) |
| Marine Installation Manual (PDF) |
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