

Eberspacher Hydroplate for Hydronic Water Heaters with heat Exchnager
Eberspächer Hydroplate Hot Water System
The Eberspächer Hydroplate system is designed for easy installation in motorhomes, caravans, welfare vehicles, utility vehicles, and mobile mess areas. While typically used when stationary, it can also be utilized while on the move.
This system can be powered by a separate diesel fuel tank or the vehicle’s own diesel supply and requires a 12V DC power source.
We offer optional fan matrix units ranging from 2kW to 4kW, allowing for the supply of ducted hot air, tailored to your specific needs.
Key Features:
The Hydroplate system can be installed alongside an HS3 heater or operated independently, providing flexible installation options.
L = 39cm x W=19cm H= 30cm


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:
ASK A QUESTION ABOUT THIS PRODUCT
Hi Chris,
Yes, this product is new to our range. The dimensions are:
Length: 39 cm
Width: 19 cm
Height: 30 cm
Hi, the Hydroplate doesn’t have a large internal tank — it’s a plate heat exchanger, so the capacity is very small and not something you need to fill separately. You simply fill your heater’s coolant circuit as normal.
Eberspächer recommend using a 10%–50% antifreeze mix, with 10% being the minimum for corrosion protection. If you’re in colder conditions, a higher percentage (e.g., 30–40%) is recommended.