Rank #9 in Best Diesel Heaters 2026: 10 Ranked, and Why the kW Claims Don't Add Up
EVGTTI 8 kW All-in-One Diesel Night Heater, 12V
Price and rating as shown on Amazon when we collected them. Both change.
The EVGTTI 12V 8KW all-in-one diesel air heater takes #9 in this guide. It is sold as a single casing rather than a kit to assemble, and the listing bundles an LCD screen, a remote control, an air filter, air and exhaust pipework, a silencer and a mounting kit. Price is £63.99 and the rating is 4.7 out of 5 from 16 ratings. The advertised output is 8KW at a rated voltage of 12V, with an item size of about 15.3 x 5.7 x 5.7 inches.
That item size is the finding worth stopping on. It is the same figure the 5KW PRIJESSE unit carries in this guide: identical external dimensions, 3KW apart on the badge. The EVGTTI listing gives no second output figure that would settle which number is the real one. The rating breakdown is also awkward arithmetic — 83% five-star, 9% four-star and 8% three-star, set against 16 ratings in total, and 83% of 16 is not a whole number of buyers.
Everything on this page is taken from the Amazon listing as it was supplied to us. We have not run, measured or dismantled this heater.
How those 16 ratings break down
An average hides its own shape. This is the spread behind the 4.7 stars.
Specification
Exactly as published on the Amazon listing, field for field.
| Price | £63.99 |
|---|---|
| Customer rating | 4.7 out of 5 from 16 ratings |
| Claimed heater power | 8KW (as listed) |
| Rated voltage | 12V |
| Item size | about 15.3 x 5.7 x 5.7 inches (as listed) |
| Working temperature, heater | -40°C to +50°C (as listed) |
| Working temperature, oil pump | -40°C to +40°C (as listed) |
| Manufacturer reference | EVG-8KW-YT |
What buyers actually say
Quoted from customer reviews on Amazon
Verified purchase“Quality is brilliant, have bought 3 of these so far for different people to heat workshops at a fraction of the cost they had been paying for conventional means”
Verified purchase“Absolutely fantastic machine and so easy to install! Filled her up with fuel and off it goes. Warms my shed perfectly and uses minimal diesel. Value for money 🤑 and arrived very quickly too. Very happy 😁😁😁😁”
What it is up against
The rivals it was ranked against in Best Diesel Heaters 2026: 10 Ranked, and Why the kW Claims Don't Add Up.
Questions people ask
What output does the EVGTTI 8KW all-in-one diesel air heater claim?
The listing states heater power of 8KW, a rated voltage of 12V, and diesel as the fuel. It is the only output figure given in the listing.
How big is the EVGTTI 8KW heater?
The listing gives an item size of about 15.3 x 5.7 x 5.7 inches. The 5KW PRIJESSE unit in this guide carries the same dimensions.
What working temperatures does the listing give?
The heater is listed at -40°C to +50°C and the oil pump at -40°C to +40°C.
What is in the box with the EVGTTI 8KW?
1 x air heater with LCD screen, 1 x remote control (batteries not included), 1 x air filter, 1 x air outlet pipe, 1 x intake pipe, 1 x exhaust pipe, 1 x silencer and a complete mounting kit.
What does the EVGTTI 8KW cost and how is it rated?
It is listed at £63.99 with 4.7 out of 5 from 16 ratings.
Where does the listing say it can be used?
The title names car, truck, garage, boat, RV and trailer, and the description adds cars, RVs, vans, buses, trucks, recreational vehicles and engineering vehicles.
Comments
Reader comments are not checked against the manufacturer's claims above.
No comments yet
Be the first to add something we missed — a price change, a spec that turned out wrong, or how one of these held up.
Leave a comment
No account needed. Own one of these? Tell other readers how it actually performed.