A Heatflow portable heating unit with a black body, bright orange protective corners, and a top handle, shown on a plain white background.

A person outdoors in a tent in a field uses a controller connected to a Heatflow diesel heater sitting in the background near a tent, with trees and an overcast sky visible.

Close-up of the control panel of an orange and black generator, showing a fuel window, fuse socket, and two electrical outlets labeled INPUT and CONTROL.

Close-up of a Heatflow outdoor heater with an orange and black front housing, a corrugated green and black intake hose, and a black protective cover partially covering the hose.

A Heatflow diesel heater unit with a black and orange color scheme, featuring a top handle, a vertical fuel gauge, and a side panel marked with a caution hot icon.

Close-up of a dark gray exhaust cover with a stainless steel curved exhaust.

A black and orange portable heating unit shown next to a person's hand holding a hose connector, on a plain white background.

Heatflow Portable Diesel Heater - Refurbished

Name: Heatflow Portable Diesel Heater - Refurbished
Brand: Totalcool
SKU: HF01A
Price: 599.00 GBP
Availability: InStock

£599.00

£799.00

Save £200.00

Klarna

3 payments of £199.66 at 0% interest with Klarna

18+, T&C apply, Credit subject to status.

THIS UNIT IS REFURBISHED

Refurbished Heatflows may have slight signs of previous use but the functionality remains the same as a brand new product. They may have been used as a demo. Refurbished Heatflows come with a 2 year warranty. Whilst these products may have experienced previous use, our expert technicians professionally inspect, clean, sanitise and repair each unit. Each item is certified to perform like new. Scratches and minor imperfections may be noticeable to the user.

Keep warm anywhere, built to be outside.

IP33 Rated
5kw heater
Made in Britain
8-15W Whilst running
115W Peak power draw

Features

Controller:

CO Sensor (Auto shutdown if the CO limit is exceeded for a set time)
Auto altitude adjustment adjusts fuel mixture to current altitude
Manual temperature mode set the temperature
Auto temperature mode set the temperature, and the heater will maintain the set temperature
Manual fuel pump priming function
Countdown timer –
On-off timer
Bluetooth Mobile App
(contains countdown timer, fan-only mode, fuel level estimation, 24/7 on-off schedule timer)

Dimensions

Unit Body

L 412mm / W 212mm / H 286mm

Unit with Exhaust cover

L 412mm / W 269mm / H 286mm

Weight (empty): 10KG

Heatflow User manual

Download the Heatflow User manual

Warranty Policy

Contact Us: If you suspect a warranty issue with your Totalcool product, please email us at sales@totalcool.co.uk before returning the item.

Provide Details: Include a few photos and a brief description of the problem, as well as your original order number. This helps us resolve your issue quickly.

Warranty Coverage Periods:

24 months

What the Warranty Does Not Cover:

- Normal Wear and Tear: Scratches, fading, and other signs of normal wear.

- Other Damage: Damage not caused by defects in materials or workmanship, such as neglect, abuse, improper maintenance, or customer-performed repairs or alterations.

- Professional Use: Items used in teaching, rental, commercial, or instructional activities.

- Improper Care: Damage from failure to follow care instructions, including improper handling or storage.

- Second-Hand Items: Items sold as second-hand or not purchased directly from Totalcool.

Totalcool retains the right to define acceptable wear and tear conditions. This typically involves following the provided care instructions and taking reasonable precautions to maintain the product.
Totalcool will not repair or replace items that show clear signs of physical stress, such as rips and tears, or where there is evidence of inadequate care, poor fit, treatment, or deliberate misuse.

Heatflow Portable Diesel Heater - Refurbished

£599.00

£799.00

QUICK & EASY ADJUSTMENTS

Change temperature, airflow and power in seconds.

EASY TEMPERATURE CONTROL

Fine-tune your settings using the controls or compatible app.

IDEAL FOR COOLER WEATHER

Reliable warmth when temperatures start to drop

ADJUSTABLE FAN SPEEDS

Fine-tune the airflow to suit your surroundings.

IP 33 Rated, Built to be outside

The Heatflow is built to handle whatever the outdoors throws its way. Leave it outside where it’s meant to be while it delivers a steady flow of clean, powerful heat wherever you need it. Unlike most diesel heaters, the Heatflow is purpose-built for outdoor use, eliminating many of the risks that come with bringing heat indoors.

12V and Mains AC Compatibility

Power the Heatflow wherever you are. Running on 12V, 24V, or a mains connection, it’s ready to fire up and deliver reliable warmth in seconds. Campsites or workshops it doesn't matter.

Heat-shielded exhaust panel

The Heatflow’s side-mounted exhaust is fitted with heat shielding to prevent accidental contact and burns. Its elevated exhaust outlet keeps hot gases away from the ground, reducing the risk of fires and protecting nearby wildlife. No need for make shift exhaust kits.

Chassis-reinforced carry handle

The Heatflow has a strong, centre-mounted handle that’s fixed directly to the internal chassis for reliable support. The handle makes it easy to lift, move, and position the unit, whether you’re setting up at a campsite, workshop, or job site. Its solid mounting ensures nothing comes loose, even with regular use.

Wired controller

The wired controller gives you complete control of your Heatflow from startup to shutdown. View key information including temperature, altitude, timer settings, CO alarm status and estimated fuel level, so you can easily monitor how your system is performing. For added convenience, Heatflow also includes a Bluetooth remote and app compatibility, giving you even more ways to adjust and monitor your settings.

Built in Britain

The Heatflow is designed and built in Britain to deliver dependable quality and reliability. Each unit is produced under strict British manufacturing standards, with careful attention to durability and performance in outdoor conditions. Manufacturing locally also allows for shorter supply chains, tighter quality control, and straightforward access to customer support and spare parts.

Construction

Outer-shell: Powder coated, Folded steel

Impact resistant edging: Flame retardant ASA

D-Shackle: Reinforced Steel connected to inner chassis

Carry handle: Nylon build, connected to inner chassis

Input / Output

Control input port: 3 Pin LP-12 IP68 Waterproof connector

Fuse Type

Glass cartridge

FAQ

How long will this Diesel heater run on a full tank?

On a full tank the Heatflow will run for an approximate 20 Hours. The Heatflow uses 0.25L per hour of diesel fuel.

How do I operate my Diesel Heater?

Using the included controller or available APP view our User guide for any further information

Do I have to keep my Diesel heater outdoors?

The HEATFLOW should only be operated in spaces with adequate ventilation, it's designed to be operated outdoors with rain resistance. For experienced DIY users, the HEATFLOW could be fitted elsewhere providing it has an adequate exhaust. Dismantling your HEATFLOW voids your warranty.

How long is the warranty period on my Diesel heater?

Totalcool offer a 3 Year warranty on the HEATFLOW Diesel heater or a 2 year warranty when purchasing a refurbished unit.

How portable is this heater?

The HEATFLOW has a sturdy centre fit handle and weighs in at 10kg when the tank is empty, making it very easy to move from place to place.

Can I move my HEATFLOW after it's been operating?

Your HEATFLOW unit can be moved after operation but it's important to keep the exhaust facing away from your body to avoid burns. Once air ducting has been removed after operation be careful not to press exposed heater to any person(s).

Can I move my unit during operation?

We don't recommend moving the unit during operation to ensure everything continues to run smoothly. However there is no issue repositioning it as long as safety precautions are taken to not touch hot-zones.

Do I need to worry about pressure build-up?

You do not need to worry about any pressure build-up within the HEATFLOW fuel tank thanks to the pressure-release fuel cap.

How do I secure my HEATFLOW outdoors?

Using the Chassis-reinforced D-Link visible a chain can be attached and connected to any other immovable object e.g. Car wheels or Tent poles.

How much fuel do I have left?

The backlit fuel window is a good indicator of current fuel level and the control app provides an estimated reading based on time in use since last re-fuel

Let customers speak for us

from 958 reviews

Cool box

Well built very quick to get to temperature over the moon with this cool box

Brian G.

10/22/2026

I have been using several of Total Cools products for the past few years and have e now added to

I have been using several of Total Cools products for the past few years and have e now added to them with this. Can't wait for warm weather again to check it out

A38 C.

10/22/2026

Totalcool 3000 Portable Air Cooler (White/Grey)

After service

Very helpful after service. Advised on the connection requirements following purchase

Timothy C.

10/22/2026

Total freeze 35

Arrived next day after the NEC show and brilliant bit of kit. Easy to use

Sara H.

10/21/2026

Great - just what we were looking for

Great - just what we were looking for.
Will be perfect in the garage of our motorhome.

Christopher Y.

10/21/2026

Great products and support throughout life

So far I’ve owned 3 total cool products. All three have been well engineered and do their job really well. Sometimes though even the best products can have issues, and this is when you find out who your suppliers really are. When one of my products developed a fault, Totalcool were brilliant in terms of response. The product was returned to them and they replaced it within a week, no quibbles or fuss. I’ve also previously contacted them about technical queries and had very fast responses to my enquiries. This has built a huge amount of trust in my book, and I’d have no hesitation in buying their products in the future. Thanks for the quality and support.

Richard T.

10/21/2026

Good value

Cools very quickly and good value for money compared to others we looked at.

Anonymous

10/21/2026

Wanted something to power a tv in our motorhome( without using mains) had it running for three hrs

Wanted something to power a tv in our motorhome( without using mains) had it running for three hrs and still shows 30 plus hours of battery left, impressed so far

Mark B.

10/20/2026

Great cool bag that kept stuff cool

Great cool bag that kept stuff cool.for over 50 hours

Lynn F.

10/14/2026

Customer service and coolbox refurb excellent as always

Customer service and coolbox refurb excellent as always.
Great people to deal with.

Stuart F.

10/14/2026

Very versatile fridge/freezer.

This is the second unit we have and we are rely pleased. However I was a bit disappointed that the second unit did not include a basket in the main compartment.

Dave W.

10/12/2026

Easy website to order

Easy website to order , great communication with delivery slots , and customer service is excellent

Andrew G.

10/10/2026

So far so good

So far so good. Neat compact unit that feels solid. Customer service has been 10/10 and delivery was very fast.

Carrie E.

10/10/2026

From start to finish spot on

Anonymous

10/07/2026

Great customer service!

We worked our freezer very hard, running it continuously for 14 months , most of which was in the tropics. After 4 years, when it broke down, customer services were very helpful. We are sufficiently pleased that we have bought a new one!

Jane P.

10/07/2026

Heatflow Portable Diesel Heater - Refurbished

FAQ

Customers are saying

Let customers speak for us

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