Thermoduct Diesel Heater Duct Insulation Sleeve 50mm–60mm x 750mm

Improve the efficiency of your diesel heater with this Thermoduct insulated duct sleeve, designed for diesel heater duct insulation on 50mm–60mm warm air ducting in campervans, motorhomes, boats and commercial vehicles.

By insulating your heater ducting, Thermoduct helps retain warm air as it travels through the duct, reducing heat loss and improving the overall performance of your heating system.

Sold in 750mm lengths – simply increase the quantity to match the total length of ducting you wish to insulate.

Why Use Thermoduct?

Independent testing has shown that up to 40% of a heater's heat output can be lost through uninsulated ducting. Thermoduct helps minimise this heat loss, allowing more warm air to reach your living space.

The result is:

• Faster cabin warm-up times

• Improved heating efficiency

• Reduced fuel consumption

• Lower battery and electrical usage

• Better overall heater performance

Product Features

• Designed for 50mm–60mm warm air ducting

• 750mm length (sold per section)

• Manufactured from 19mm Thinsulate™ insulation

• Excellent thermal insulation properties

• Resistant to moisture and water ingress

• Durable outer fabric for long-lasting protection

• Fully stitched construction for easy installation

• Helps reduce heat loss from warm air ducting

Easy to Install

The closed-end stitched design allows the ducting to slide easily inside the sleeve without snagging the insulation, making installation quick and straightforward.

Ideal For

• Campervans

• Motorhomes

• Caravans

• Boats

• Commercial vehicles

• Off-grid and expedition vehicles

Technical Specifications

• Suitable Duct Size: 50mm–60mm

• Length: 750mm

• Insulation Material: 19mm Thinsulate™

• Application: Warm air heater duct insulation

Ordering Information

This Thermoduct is sold in 750mm lengths.

For longer duct runs, simply increase the quantity ordered to achieve the required overall length. For example:

• Quantity 2 = 1.5 metres

• Quantity 4 = 3 metres

Adding Thermoduct insulation is one of the simplest and most effective ways to improve the performance and efficiency of your diesel heating system, especially during colder weather.

Frequently Asked Questions

What size ducting is this sleeve suitable for?
This sleeve is designed for 50mm–60mm warm air ducting.

How is it sold?
It is sold in 750mm lengths, and you can increase the quantity to cover longer duct runs.

What does duct insulation help with?
It helps reduce heat loss from diesel heater ducting, improving heating efficiency and warm-up performance.