The Complete UK Van Heating Guide: Diesel, LPG, and the Hi-Vis Vest Alternative

(there are better solutions than layering up in a Salisbury layby at 3am)

There's a particular moment, usually somewhere around 3am in late November, when you wake up in your van and realise the ceiling is dripping on your face. Not a leak — that's your own breath, condensed overnight onto cold metal, now returning to you like a damp little judgement. The dog has stolen the duvet. Your nose is the temperature of a fridge shelf. And it dawns on you, with the clarity that only comes from genuine misery, that you should have sorted out heating before you left.

I've been that person. I once spent a night in a layby near Aviemore wearing every item of clothing I'd brought, including a hi-vis vest, on the basis that it was technically another layer. It was not a good night. The thing nobody tells you about UK van life is that our winters aren't the crisp, cold-and-sunny business you see in Alpine ski adverts. They're damp. Cold and wet works its way into everything — the mattress, your bones, your will to live — and no amount of merino base layer fixes a van that's running at outside temperature.

So heating isn't a luxury bolt-on. If you intend to use the van for more than about eleven weeks of the British summer, it's the thing that makes the difference between a van you love and a van you keep meaning to sell. Here's how to pick the right one, without reading a dozen forum threads that all contradict each other.

The Four Options (and a fifth for the romantics)

Diesel air heater — the Chinese clone

£80–£200. This is the elephant in the van. Walk into any UK van meet and roughly everyone has one bolted under their seat. They work by burning a small amount of diesel in a sealed combustion chamber and blowing the resulting heat into the cabin, while the exhaust vents safely outside. Simple, effective, and cheap enough that you almost feel guilty.

Why is everyone buying them? Because for eighty quid you get something that genuinely heats a van. That's an absurd amount of warmth per pound. The catch is what you're trading for the price: variance. These units are clones of the Webasto/Eberspächer design, assembled to wildly inconsistent standards. Some run faultlessly for years. Some develop a sulk after one season. The usual failure points are the control board, the glow plug, and the fuel pump — all replaceable, all cheap, but all liable to go without warning. "It'll be fine" is a perfectly reasonable bet right up until it isn't, and how much that matters depends entirely on whether a dead heater means mildly annoying or genuinely cold night in Glencoe with no plan B.

Diesel air heater — Webasto / Eberspächer

£700–£1,500 fitted. The grown-up version. Same principle, vastly better execution. The reason for the price gap is real and it's mostly reliability and support: tighter manufacturing, better-quality glow plugs and pumps, and — crucially in the UK — a network of dealers and parts. When a Webasto throws a wobbly, there's a known diagnostic path and a part you can actually buy. (Worth knowing: Eberspächer now trades as Espar in the campervan world, so you'll see both names when you search — same heaters.)

Who's it for? Full-timers, big-mileage travellers, and anyone whose tolerance for lying on a frozen driveway diagnosing a £90 unit has reached zero. This is the fit-and-forget option, and if you're heating a van every night through winter, "fit and forget" is worth paying for.

LPG — Propex

The Propex HS2000 is, for practical purposes, the only LPG air heater anyone in the UK actually fits. Its big advantage over diesel is noise — it's noticeably quieter, with none of the little fuel-pump tick-tick-tick that some people find genuinely maddening when they're trying to sleep. No diesel smell, either.

The trade-off is gas. You need a separate LPG supply — a bottle or an underslung tank — and running costs tend to come out a bit higher than diesel for the same heat. It makes most sense if you're already running LPG for cooking (one fuel to manage), if you're mostly static or on campsites, or if diesel heater noise is the specific thing keeping you awake.

Electric

Brief, because it deserves brief. An electric heater works beautifully — silent, no combustion, no fumes, no installation drama — right up until you unplug from the hook-up, at which point it does precisely nothing. It will flatten a leisure battery in roughly the time it takes to make a cup of tea. If you're a campsite person who's always plugged in, honestly, a £25 ceramic fan heater from a DIY shop does the job and you can stop reading. If you ever wildcamp, it's useless as a primary system.

Wood-burning stove

The romantic option. A tiny stove crackling away while rain hammers the roof is a genuinely lovely thing, and the people who fit them adore them with the fervour of the converted. I won't mock it. But be clear-eyed: it's a faff to install safely, it's an insurance conversation you'll grow to dread, it needs constant feeding, and it's wildly impractical for a vehicle you actually move around. For most people reading this guide, it's a no. For a specific sort of person in a specific sort of van, it's the only answer. You probably already know which one you are.

The Chinese Heater Question

This is the question everyone is actually asking, so here's a straight answer instead of a shrug.

They work. Most of them. For a while. That's not me hedging — that's the genuine, honest summary. The problem isn't that Chinese heaters are bad; it's that they're unpredictable. A premium unit fails in known ways with known fixes. A clone might run for five flawless years or might cook its control board in month two, and you won't know which one you bought until you find out.

So the decision is really about consequences, not the heater. If you're a weekend warrior who stores the van between trips, can troubleshoot a bit, and has a backup plan (a mate's sofa, a nearby campsite, a 4-tog of last resort), the saving is enormous and probably worth it. If you're full-timing through winter and a failed heater means a properly bad night with no fallback, the maths shifts hard toward spending the money once.

Two things that come up constantly and apply regardless of brand. First: a CO alarm is non-negotiable — more on that below. Second: the fuel smell. A faint diesel whiff on startup is normal; a persistent smell while running is not, and it almost always means an exhaust leak or a dodgy fuel line. Don't live with it. Fix it.

Sizing: How Much Heat Do You Actually Need

Don't overthink this. The rule of thumb:

• 2kW for a standard panel van up to about 5.5m (most T4/T5/T6 conversions live here).
• 4–5kW for a high-top, a long-wheelbase, or anything cavernous.

The honest truth is that in the damp-but-mild British climate you'll rarely run any of these flat out — the thermostat does the real work, cycling the heater to hold temperature. A 2kW unit ticking over comfortably beats a 5kW one that roasts you, then freezes you, then roasts you again all night. Bigger is not better here.

Red Diesel — the UK trick nobody mentions

Here's one the internet routinely fails to cover properly. Your diesel heater doesn't care what diesel it burns, and in the UK you're legally allowed to run red diesel (rebated, off-road agricultural diesel) in a vehicle heater — because the heater isn't propelling the vehicle. The fuel duty rules are about propulsion, and a standalone heater isn't that.

It costs roughly half of white diesel at the pump, which adds up nicely over a winter. You can get it from agricultural merchants, marinas and boatyards, and some rural filling stations. Practical tip: keep a small dedicated jerry can for it, store it somewhere sensible and well-ventilated, and don't — obviously — put it anywhere near your actual fuel tank. Keep it for the heater and you're entirely above board.

The One Non-Negotiable

Fit a carbon monoxide alarm. Near where you sleep. Before your first night in the van.

This is not the funny bit, so I'm not going to dress it up. CO is colourless and odourless. Every diesel and LPG heater burns fuel inside a sealed combustion chamber and vents the exhaust outside — but seals fail, exhausts crack, and cheap or ageing installs leak. You will not smell it. You will not feel it coming. You will simply not wake up.

A CO alarm costs £15–£25. Buy a proper one, mount it near the sleeping area, and check it works. There is no version of "saving money on van heating" that includes skipping this. None. If your build is in progress, also read through the CFA safety articles on combustion-heater installation and ventilation before you fire anything up for the first time.

The Decision

Buy this	…if this is you
Chinese diesel heater	Weekend or occasional use, budget is tight, you're handy enough to troubleshoot, and you've got a backup plan for the night it dies.
Webasto / Eberspächer (Espar)	Full-timing or long trips, reliability matters more than upfront cost, and you want to fit it once and forget it.
Propex (LPG)	You're already running LPG for cooking, noise genuinely bothers you, and you're mostly static or on campsites.
Electric	You mostly stay on campsites with hook-up and wildcamping is rare to never.

Whatever you land on: size it sensibly, fit the CO alarm, and you'll never have another night wearing a hi-vis vest as insulation. Trust me on that last part.