Marine Heater Kits: Webasto & Eberspacher for Every Vessel

Welcome to Butler Technik, your premier destination for high-performance marine heater kits designed for comfort and reliability on the water. We proudly stock a comprehensive range of Webasto and Eberspacher (Espar) marine heating solutions, suitable for a vast array of vessels, from compact yachts and cozy narrowboats to robust workboats and expansive large vessels... read more

Why Choose Butler Technik for Your Marine Heater?

Extensive Range: Discover air and water heater kits with heat outputs from 2kW to 9kW, ensuring you find the perfect solution for your specific heating needs. Looking for higher output? Our expert support team is ready to assist you.
Voltage Options: We offer both 12v and 24v marine heater kits to seamlessly integrate with your boat's electrical system.
Leading Brands: We supply only the best - genuine Webasto marine heaters and Eberspacher (Espar) marine heaters, renowned for their durability, efficiency, and quiet operation.
Complete Kits: Our marine heater kits come with everything you need for a straightforward installation, minimizing hassle and getting you on the water comfortably sooner.
Expert Support: Our knowledgeable team is always on hand to provide technical advice, helping you choose the right marine heating system and offering support through installation.
Fast & Reliable Delivery: Benefit from free UK delivery and fast despatch, ensuring your heater kit arrives promptly. We also offer FAST worldwide delivery.

Our Marine Heater Kit Selection Includes:

Webasto Marine Air Heaters: Experience warm, dry air with Webasto Air Top series, perfect for cabins and living spaces.
Webasto Marine Water Heaters: Integrate hot water for radiators or domestic use with Webasto Thermo Top systems.
Eberspacher (Espar) Marine Air Heaters: Reliable and efficient Eberspacher Airtronic heaters provide consistent warmth.
Eberspacher (Espar) Marine Water Heaters: For comprehensive heating and hot water, explore Eberspacher Hydronic systems.

Find Your Ideal Marine Heater:

Use our intuitive navigation to explore marine heater kits by:

Heat Output:

Heater Type:

Brand:

View all Marine Heater Categories

Beyond Heater Kits: Accessories & Support

Butler Technik is your complete marine heating solution provider. We also offer:

Marine Heater Installation Accessories: Everything from exhaust components and fuel tank pick-up kits to warm air ducting and mounting solutions. Visit the Heater installation accessories department.
Marine Heater Repair Parts: Genuine Eberspacher and Webasto repair parts to keep your heater running smoothly.
Heater Servicing & Fault Finding: Access our Customer Hub for technical libraries, knowledgebase articles, and help with Eberspacher fault codes and Webasto NSN numbers.

Trust Butler Technik for all your marine heating requirements. Shop now for unparalleled comfort on your next voyage!

Filter Products

48 Products

Webasto Air Top 2000 STC Marine Heater Kit 12v | 4111181A

Part Number 4111181A

Now £1,295.00 (ex. VAT) Was £1,663.14 (ex. VAT) Saving £368.14

Item out of stock

Eberspacher Hydronic D5WSC Heater to Hydronic S3 D5E 12V Upgrade Kit inc EasyStart PRO Timer

Part Number 252993050007

Now £995.00 (ex. VAT) Was £1,448.91 (ex. VAT) Saving £453.91

Item in stock

Webasto Air Top EVO 40 4kW 12v Marine Heater Kit with MultiControl HD 7-Day Timer | 4117979A

Part Number 4110220A

Now £1,919.93 (ex. VAT) Was £2,303.92 (ex. VAT) Saving £383.99

Item out of stock

Webasto Air Top EVO 55 Marine Air Heater Kit 5.5kW Diesel 12v | 4118032A

Part Number 4110222A

Now £1,915.00 (ex. VAT) Was £2,749.35 (ex. VAT) Saving £834.35

Item out of stock

On Sale

Eberspacher Hydronic S3 D5E Narrowboat kit inc Easy Start Pro 7 Day Timer | 292135000024

Part Number 292135000024

Now £1,695.00 (ex. VAT) Was £2,305.72 (ex. VAT) Saving £610.72

Item out of stock

Eberspacher Hydronic D5WSC Water Heater 12V Replacement Unit | 252219050000

Part Number 252219050000

Now £832.46 (ex. VAT) Was £1,684.88 (ex. VAT) Saving £852.42

Item in stock

Webasto Thermo Top Evo 5 Diesel Narrowboat kit with seven day timer

Part Number 4117864A

Now £1,495.47 (ex. VAT) Was £2,038.81 (ex. VAT) Saving £543.34

Item in stock

Webasto Air Top EVO55 Marine Universal Heater Kit 24v | 4110223A

Part Number 4110223A

Now £1,829.42 (ex. VAT) Was £2,613.45 (ex. VAT) Saving £784.03

Item out of stock

Butler Technik Webasto and Eberspacher Espar Marine Heater Finder promo

Eberspacher Airtronic D4 Plus Marine Heater 12v Diesel Kit| E5305 | 292199015305

Part Number 292199015305

Now £1,962.68 (ex. VAT) Was £2,688.60 (ex. VAT) Saving £725.92

Item out of stock

Webasto Thermo Top C 300 Marine RV Replacement Unit Only | 9023521A

Part Number 9023521A

Now £925.79 (ex. VAT) Was £1,483.23 (ex. VAT) Saving £557.44

Item out of stock

Eberspacher D5W S water heater diesel 24v | 252218050000

Part Number 252218050000

Now £1,508.30 (ex. VAT) Was £1,885.37 (ex. VAT) Saving £377.07

Item in stock

Webasto Thermo Pro 90 12v Marine Kit with switch

Part Number 4111135A

Now £1,927.92 (ex. VAT) Was £2,535.01 (ex. VAT) Saving £607.09

Item out of stock

New In

Webasto Thermo Top C Diesel Water Heater Unit Only Welfare 12v 5.2kw | 99002C

Part Number 99002C

Now £993.64 (ex. VAT) Was £1,298.18 (ex. VAT) Saving £304.54

Item in stock

Eberspacher Airtronic S3 D2L Marine Diesel Boat Heater Kit inc Easy Start Pro 2 Out 2.2kW 12v

Part Number 292113300025

£1,554.16 (ex. VAT)

Item out of stock

Eberspacher Airtronic M3 D4R Marine Heater Kit inc Easy Start Pro 4kw 12v

Part Number D4RAIRTRONICMARINE

Now £1,495.95 (ex. VAT) Was £2,412.30 (ex. VAT) Saving £916.35

Item in stock

Upgrade Kit

Eberspacher Hydronic D5WSC Heater to Hydronic S3 D5L 24V Upgrade Kit inc EasyStart PRO Timer

Part Number 253009050007

Now £1,322.00 (ex. VAT) Was £2,177.91 (ex. VAT) Saving £855.91

Item out of stock

Eberspacher Airtronic D2 to S3 D2L Heater Upgrade Changeover Kit 12v

Part Number S3D2UPGRADE12V

£849.89 (ex. VAT)

Item in stock

Webasto DBW 2010 Sensoric 24v heater set

Part Number 9023678A

Now £2,765.00 (ex. VAT) Was £3,880.15 (ex. VAT) Saving £1,115.15

Item out of stock

Eberspacher Airtronic D4 D4S to M3 D4L Heater Upgrade Changeover Kit 24v

Part Number D4RUPGRADE24V

Now £1,074.95 (ex. VAT) Was £2,734.21 (ex. VAT) Saving £1,659.26

Item in stock

Eberspacher Diesel Heater Marine Kit Airtronic S3 D2L Single Outlet 2.2kw 12v

Part Number S3AIRTRONICMARINE

Now £1,214.97 (ex. VAT) Was £1,942.00 (ex. VAT) Saving £727.03

Item out of stock

Webasto Thermo Top Evo 5 Diesel Water Heater Gen4 5kw 12v Heater Only | 9042117A

Part Number 9042117B

£814.97 (ex. VAT)

Item in stock

SHURflo Shurflo water pump strainer 1/2" BSP | 255-215

Part Number 255215

£8.49 (ex. VAT)

Item in stock

Upgrade Kit

Eberspacher Airtronic D4S Plus to M3 D4R Heater Upgrade Changeover Kit 12V

Part Number D4RUPGRADE

Now £1,092.88 (ex. VAT) Was £2,732.21 (ex. VAT) Saving £1,639.33

Item in stock

Eberspacher Hydronic S3 D5L CS Water Heater and Fuel Pump 24v | 253009050000

Part Number 253009050000

Now £1,158.21 (ex. VAT) Was £1,681.63 (ex. VAT) Saving £523.42

Item in stock

Eberspacher AM2 D4R 12V Marine Changeover Kit Includes Easy Start Pro

Part Number 292112000219

Now £1,746.86 (ex. VAT) Was £2,149.57 (ex. VAT) Saving £402.71

Item out of stock

Eberspacher D8LC 8kW Diesel Air Heater Replacement Unit Only 12V | 251890000000

Part Number 251890000000

Now £1,940.22 (ex. VAT) Was £3,880.44 (ex. VAT) Saving £1,940.22

Item out of stock

Eberspacher Airtronic M2 D4 L 4KW 12v Diesel 2 Outlet Marine Kit inc Easy Start PRO | 292112000048

Part Number 292112000048

Now £1,875.00 (ex. VAT) Was £2,916.11 (ex. VAT) Saving £1,041.11

Item out of stock

Eberspacher Airtronic S2 D2 L 12V Single Outlet Marine Diesel Heater Kit inc Easy Start PRO Timer | 292112000040

Part Number 292112000040

Now £1,707.50 (ex. VAT) Was £2,519.24 (ex. VAT) Saving £811.74

Item in stock

Webasto Thermo Top Pro 120 Water Heater with Water Pump 12v | 9035585A

Part Number 9035585A

£2,323.19 (ex. VAT)

Item out of stock

Webasto Water Heater Thermo Top Pro 120 Installation Kit 12v | 9035492A

Part Number 9035492A

£466.18 (ex. VAT)

Item out of stock

Eberspacher Airtronic S2 D2 L 12v Single Outlet Marine Heater Kit with 802 Digital Controller

Part Number 292112000038

Now £1,325.00 (ex. VAT) Was £2,113.28 (ex. VAT) Saving £788.28

Item out of stock

Webasto Eberspacher Heater M-II D10W 12V

Part Number 252434050000

Now £1,758.34 (ex. VAT) Was £2,197.93 (ex. VAT) Saving £439.59

Item out of stock

Eberspacher Airtronic M2 D4 L 4KW 12v Diesel 2 Outlet Marine Kit 802 Modulator | 292112000046

Part Number 292112000046

Now £1,685.00 (ex. VAT) Was £2,834.97 (ex. VAT) Saving £1,149.97

Item out of stock

On Sale

Webasto Thermo Top Evo 5 Diesel Marine kit with Multi-controller HD 12v | 4117849A

Part Number 4117849A

Now £1,525.83 (ex. VAT) Was £2,186.01 (ex. VAT) Saving £660.18

Item in stock

Eberspacher D5LC To Airtronic D5 Changeover Kit 12v

Part Number 292199016749

Now £1,697.67 (ex. VAT) Was £2,635.85 (ex. VAT) Saving £938.18

Item out of stock

Eberspacher Airtronic D2 12v Kit Single Outlet Marine kit inc Easy Start Timer

Part Number D2AIRTRONICMARINE

Now £1,070.83 (ex. VAT) Was £1,381.23 (ex. VAT) Saving £310.40

Item out of stock

Showing 36 of 48

Why Install a Boat Heater?

Installing a good marine heating system will extend your boating season and keep you warm and dry in cold weather. A side benefit to consider is that the inside of your vessel and its occupants will be less affected by dampness.

The heat from high-quality marine heaters is dry. This reduces the risk of mold and mildew. As a result, the inside of your vessel is healthier. This applies to both pleasure craft and commercial vessels.

Marine Heaters at Butler Technik

At Butler Technik we supply a range of diesel boat heaters from well known manufacturers Webasto and Eberspacher (Espar). These two leading brands create high quality and durable heaters to ensure reliability and serviceability.

Within the range of the boat heaters are a selection of kits suitable for a variety of heat output configurations and heating power from 2kW and ranging up to 12kW.

Within our product range you will find boat heating systems from leading manufacturers Webasto and Eberpsacher (Espar)that are reliable and easy to install with the help of our technical library. Our experienced technicians are also available via telephone or email. Butler Technik are ready to help you. Here a few things to consider when choosing and installing a marine heater.

Quality Marine Heating

Eberspacher and Webasto marine diesel heaters are designed to last, are easily maintained and replacement parts are always available. You will find a variety of marine heaters within the Butler Technik range to suit the specifications of your marine vessel including 12v and 24v systems. We also have in stock a wide range of boat heater installation accessories and replacement parts.