# LF Bros 5 kW Diesel Heater, 12V, T3 LCD Timer

Source: https://www.ranked10.co.uk/home/best-diesel-heaters/lf-bros-5kw-diesel-heater
Ranked #5 in "Best Diesel Heaters 2026: 10 Ranked, and Why the kW Claims Don't Add Up": https://www.ranked10.co.uk/home/best-diesel-heaters

- Price: £219.98 (checked on Amazon UK on 2026-09-16)
- Amazon rating: 4.9 from 24 ratings
- Buy on Amazon: https://www.amazon.co.uk/dp/B0D6FCCY4S?tag=ranked10-21

The LF Bros 5kW 12V Diesel Heater is number five in this guide. It is a 12-volt diesel air heater aimed at car, van, motorhome and boat cabins, sold at £219.98, and the listing carries a 4.9 out of 5 rating from 24 ratings. It ships as a kit with a T3 LCD controller, a remote, a timer that can be set anything from 1 to 24 hours ahead, and two running modes: power mode, where it holds the power you set, and temperature mode, where it heats to a set temperature and then runs at its lowest power.

The reason it sits at five rather than higher is the same reason the rest of this guide exists: the numbers on the listing do not agree with each other. LF Bros puts 5 kW on the product and the spec table says it twice — once as "Cooling Power: 5 Kilowatts" and once as "Wattage: 5000 watts" — but the bullet describing output quotes 4700~17000 BTU, so 5 kW is the top of the range the listing itself gives, not the whole of it. The rating count tells the same story: the page shows 4.9 out of 5 from 24 ratings, while the breakdown beside it adds up to 93 five-star and 7 four-star reviews. The spec table is also borrowed from air conditioning, listing a compressor type, an inverter and "Is Outdoor Unit Required: No" for a machine that burns diesel. Everything on this page comes from the Amazon listing — the price, the figures and the buyer comments — and none of it comes from testing we have done ourselves.

## Specification

| Field | Value |
|---|---|
| Price | £219.98 |
| Rating | 4.9 out of 5, from 24 ratings |
| Rating breakdown | 93 five-star and 7 four-star (100 shown) |
| Claimed heat output | 5 kW, listed as "Cooling Power: 5 Kilowatts" |
| Wattage (as listed) | 5000 watts |
| Heat range in the bullets | 4700~17000 BTU |
| Fuel consumption | 0.18~0.53 L/H |
| Dimensions and weight | 37.8 D x 15 W x 14.1 H cm; 12 kg |

## Questions people ask

**How much does the LF Bros ER5.0 cost?**

The listing price is £219.98, and at the time of writing it carries a 4.9 out of 5 rating from 24 ratings.

**Is the LF Bros 5kW diesel heater really 5 kW?**

The listing says so in two places — "Cooling Power: 5 Kilowatts" and "Wattage: 5000 watts" — but the bullet that describes output gives a range of 4700~17000 BTU, so the 5 kW figure matches the top of the range the listing itself quotes.

**What fuel consumption does LF Bros quote for the ER5.0?**

0.18~0.53 L/H, quoted in the same bullet as the 4700~17000 BTU output and a working temperature of -40°C to 40°C.

**Why does a diesel heater have a compressor type listed?**

Because the Amazon spec table for the LF Bros ER5.0 is built from air-conditioning fields. It lists "Cooling Power: 5 Kilowatts", "Compressor Type: reciprocating", "Inverter Type: Has Inverter" and "Is Outdoor Unit Required: No". We report them exactly as they appear.

**What size is the LF Bros ER5.0 and what does it weigh?**

The listing gives item dimensions of 37.8 cm deep, 15 cm wide and 14.1 cm high, and a weight of 12 kg. It also lists window opening widths of 15 cm and heights of 14.1-15 cm.

**Can I set the LF Bros heater to come on before I get in?**

Yes. The T3 LCD display has a timer, and the listing says you can schedule heating from 1 to 24 hours ahead by pressing the Time button on the switch.