Diesel Heater for Camper: Complete Owner's Guide
Jun 06, 2026
Yes, diesel heaters are the best heating option for most campers and RVs — dry heat, no condensation, runs on $0.10 to $0.30 of fuel per hour, works down to -40°F (-40°C). A 2.5KW Vvkb Apollo V1 covers most truck campers, Class B vans, and small motorhomes. A 5KW Apollo V2 handles Class A/C motorhomes, 5th wheels, travel trailers, and toy haulers.
This guide walks you through how to pick the right kW, where to install it, what fuel system you need, the 5 safety rules every camper owner should know, and answers to the questions Vvkb's customer support team hears most often.
Key takeaways:
- 2.5KW (8,500 BTU) for compact builds — truck campers, Class B vans, small motorhomes
- 5KW (16,500 BTU) for full-size RVs — Class A/C motorhomes, 5th wheels, travel trailers, toy haulers
- Install time: 4–8 hours for a first-time DIYer (no engine work required)
- Fuel cost: $0.11–0.50/hr depending on size and setting
- Works down to -40°F (-40°C), auto-adjusts up to 11,483 ft (3,500 m)
- Certified: CE, RoHS, FCC, and E-mark
Why diesel beats propane and electric for camper heating
Diesel heaters give you 8–12 hours of warmth on about $2 of fuel without producing any cabin condensation — the two biggest reasons they've replaced propane and electric heaters in serious camper builds. The trade-offs are real but small: you need a 12V battery (heaters draw 5–10A on startup, 1–2A running), and the install is more involved than plug-and-play.
Diesel vs propane
The difference comes down to dry heat and fuel economy:
| Diesel heater | Propane heater | |
|---|---|---|
| Heat type | Dry (combustion vented outside) | Wet (water vapor released indoors) |
| Fuel cost (8 hrs heat) | ~$1.40–2.50 (0.4–0.6 gal diesel @ $4/gal) | ~$3–6 (2–4 lbs propane) |
| Cold weather operation | Works to -40°F (-40°C) | Tank pressure drops below 20°F (-7°C) |
| Indoor air safety | Sealed combustion — no CO indoors | Open flame — CO + moisture concerns |
| Refill convenience | Same tank as your RV diesel system | Carry separate propane bottles |
Propane heaters dump water vapor inside your camper — that's why van and RV owners wake up with foggy windows, damp walls, and wet sleeping bags. Diesel combustion happens in a sealed chamber and vents straight outside, so the heat coming into your cabin is bone dry.
Diesel vs electric
Electric heaters need shore power or a generator. If you're off-grid, diesel wins by default:
- Electric requires 1,500–5,000W AC — a draw your house battery can't sustain for hours
- Diesel runs on 12V DC — average 12–60W power draw, so a 100Ah battery can run the heater for days
- Both give dry heat, but electric is impractical off-grid
If you only camp at full-hookup sites, an electric ceramic heater is fine. For boondocking, overlanding, or vanlife, electric is a non-starter.
Disadvantages (honest)
Diesel heaters aren't perfect:
- Install is involved — you cut into the floor or build a mounting box (4–8 hours for a first-time DIYer)
- You need a 12V battery — short power outages don't hurt, but you can't run a diesel heater off zero battery
- Slight exhaust noise — the muffler keeps the heater itself quiet, but you'll hear a soft pulse at the exhaust outlet outside
- Small electricity cost — about 2¢ per night to run the fan and pump
For the trade-off — dry heat, cheap fuel, weeks of off-grid warmth — most camper owners find these acceptable.
How a diesel heater actually works (30-second explainer)
A diesel heater is a sealed combustion system that burns diesel fuel in one chamber and blows clean warm air into your cabin from a separate chamber — your cabin air never touches the flame or exhaust. That's why diesel heaters are dry, safe, and quiet.
Here's the full cycle in 7 steps:
- Fuel pump pulls diesel from your tank (or a separate 10 L diesel tank) and meters it precisely.
- Atomizer sprays the fuel as a fine mist into the sealed combustion chamber (made of 2520 stainless steel on Vvkb units — won't deform under repeated heat cycles)
- Kyocera ceramic glow plug ignites the fuel mist — fires reliably down to -40°F (-40°C)
- Hot combustion gases pass through an ADC12 die-cast aluminum heat exchanger (1,000-ton press construction on Vvkb units — more thermal mass than thinner alternatives)
- Cabin air fan pulls cold air from inside your camper across the outside of the heat exchanger
- Warm dry air blows into your living space — typically 60–80°F warmer than the intake air
- Exhaust gases vent through a separate stainless steel pipe straight outside your camper — completely isolated from your breathing air
The whole cycle runs on 12V DC (about 12–60W average) and consumes 0.1–0.47 liters of diesel per hour depending on model and heat setting (V1 max 0.25 L/hr, V2 max 0.47 L/hr).
Why this matters: because combustion and cabin air are in different chambers, you get heat without any of the dangers people associate with combustion heaters — no CO leaking into your sleeping area, no water vapor making your bedding damp, no open flame inside the cabin.
Sizing: 2.5KW vs 5KW (and why "8KW" is a marketing myth)
Most camper owners need either a 2.5KW Apollo V1 (8,500 BTU) or a 5KW Apollo V2 (16,500 BTU) — picking between the two comes down to your RV class and how cold you camp. The 8KW units flooding Amazon and AliExpress are a marketing trick; their actual output rarely exceeds 5KW (more below).
Quick sizing rule
A rough RV heating guideline is 20–30 BTU per cubic foot of well-insulated cabin space, doubled for poor insulation or extreme cold.
| Cabin volume | Insulation | Recommended |
|---|---|---|
| Under 300 cu ft (small van, truck camper) | Good | 2.5KW (V1) |
| 300–600 cu ft (Class B, small Class C) | Good | 2.5KW (V1) |
| 600–1,000 cu ft (Class C, travel trailer) | Good | 5KW (V2) |
| 1,000+ cu ft (Class A, 5th wheel, toy hauler) | Any | 5KW (V2) |
| Any size | Poor (single-pane windows, thin walls) | 5KW (V2) |
| Any size | Camping below -20°F (-29°C) regularly | 5KW (V2) |
Which RV class needs which heater
| RV Type | Typical Cabin Size | Vvkb Recommendation |
|---|---|---|
| Class A motorhome | Large (28–45 ft) | V2 (5KW) |
| Class B van conversion | Compact (16–24 ft) | V1 (2.5KW) |
| Class C motorhome | Mid (21–32 ft) | V2 (5KW) |
| 5th wheel | Large (28–45 ft) | V2 (5KW) |
| Travel trailer | Variable (12–40 ft) | V1 (under 20 ft) or V2 (over 20 ft) |
| Toy hauler | Large (open layout) | V2 (5KW) |
| Truck camper | Compact | V1 (2.5KW) |
| Teardrop trailer | Very small | V1 (2.5KW) |
Don't over-size
A 5KW heater in a 200 sq ft van will short-cycle (overheat → shut off → restart → repeat), which shortens heater life and creates uncomfortable temperature swings. Match the wattage to the space — bigger is not better.
Why "8KW" diesel heaters are a marketing trick
If you've shopped Amazon or AliExpress, you've seen "8KW diesel heaters" for $80–150 that look like a bargain. Here's the physics: the housing, combustion chamber, and fan on these "8KW" units are identical to the 5KW units from the same factories. Independent testing on cheap "8KW" units consistently measures actual output of 4.5–5KW, not 8KW.
A real 8KW unit would need:
- A physically larger housing (more thermal mass)
- A larger combustion chamber
- A more powerful fan
- Heavier-gauge heat exchanger
None of which the cheap "8KW" units have. If a heater is the same physical size as a 5KW unit, the rated wattage is marketing — not what's coming out of it.
The Vvkb Apollo V2 is honestly rated at 5KW (16,500 BTU) and performs at full rated output. Most "8KW" cheap units perform at the same level as the V2 — they're just labeled to sell. Pay for what you actually get.
Where and how to install (4 locations + 8-step overview)
You can install a Vvkb Apollo diesel heater in your camper in 4–8 hours with basic hand tools — no engine work required. The hardest decision isn't the install itself, it's picking the right mounting location for your build.
4 install locations (pick one)
Option 1: Under-floor mount (most popular) The heater sits below the camper floor, between the frame rails. Hot air ducts up through a single floor cutout into the cabin. Best for: vans, Class B, truck campers, travel trailers with belly storage.
- ✅ Saves all interior space
- ✅ Quietest — combustion noise stays under the floor
- ❌ Requires cutting through the floor (one ~3" hole for the duct)
Option 2: Interior cabinet mount The heater installs inside a sealed cabinet (often a bench seat or wardrobe base). Combustion air comes in from outside through a hose, exhaust vents out through another hose.
- ✅ No floor cutting, no exposed components
- ✅ Most efficient — every BTU stays inside
- ❌ Takes up cabinet space (about 1 sq ft)
Option 3: External rear box The heater lives in a weatherproof box mounted to the rear bumper or hitch carrier. Ducted hot air runs into the cabin.
- ✅ Zero interior intrusion
- ✅ Best for retrofit installs in finished campers
- ❌ Some heat loss through the duct run
- ❌ Box adds weight at the rear (50–80 lbs total)
Option 4: Portable unit (no install required) The Vvkb Portable Diesel Heater is a self-contained 5KW unit with a built-in fuel tank and battery box. You set it up outside your camper, run a flex duct through a window or door, and you're done.
- ✅ Zero install — works in any camper, tent, ice fishing house
- ✅ Move it between rigs / take it home in summer
- ❌ Takes outdoor floor space when running
- ❌ Less efficient than a fixed install
Watch the install in action
8-step install overview
A dedicated step-by-step install guide with photos is coming soon. For now, here's the high-level workflow:
- Plan the location — pick from the 4 options above, measure all clearances
- Mount the heater unit — bolt or strap it to a flat surface, lowest point of the airflow path
- Run the exhaust pipe — 304 stainless steel, slight downward slope, 12+ inches (30+ cm) from any opening window
- Run the combustion air intake — fresh outside air, never share with cabin air
- Install the fuel pump — 60–100 cm from the heater, outlet facing up (closer than 60 cm = noisy + carbon buildup)
- Run the fuel line — to your existing diesel tank (using a standpipe 2 cm above tank bottom) or to a separate 10 L diesel tank.
- Wire the controller — 12V battery, red to positive, black to negative (reversing this fries the controller — one of the most common warranty claims)
- Prime the system + first start — bleed air from the fuel line, fire it up, let it run for 30 minutes before relying on it
Common install pitfalls (Vvkb support sees these every month)
- Skipping the fuel pump distance (too close = noisy + carbon buildup)
- Reversing battery polarity (instant controller damage, not covered by warranty)
- Mounting the exhaust pipe horizontally or angled up (water backs up, freezes, blocks the pipe)
- Running the controller wire near antenna or speaker wires (electromagnetic interference triggers fault codes)
Install cost
DIY cost is just the heater plus $20–30 for extra hose clamps, zip ties, and sealant. Mobile RV techs typically charge $300–500 for a basic install if you'd rather not DIY.
Fuel system + running costs
A Vvkb diesel heater burns 0.10–0.47 liters of diesel per hour depending on model and heat setting — about $0.11–0.50 per hour at $4/gallon US diesel. A single 10 L (2.6 gal) tank gives you 21–100 hours of heat. Power draw is 12–60 watts average — your 100Ah house battery can run the heater for days without recharging.
Fuel source: tap your RV tank or use a separate diesel tank?
You have two options:
Option A: Tap your RV's diesel tank (for diesel-powered RVs/vans)
- Drill a hole in the tank top and install a standpipe that sits 2 cm above the tank bottom (so sediment doesn't clog the heater)
- ✅ Never run out, no extra container, no smell
- ❌ Requires drilling (or pulling the tank), uses your driving fuel
Option B: Separate Vvkb UV-resistant 10 L diesel tank (for gas RVs or anyone who wants isolation)
- A standalone Vvkb UV-resistant 10 L diesel tank (sold separately — not included in the heater kit) with a fuel pickup line
- ✅ Zero modifications to your RV, easy refills
- ✅ Black UV-resistant plastic prevents fuel degradation from sunlight — white translucent tanks let UV through and ruin diesel over time
- ❌ Slight smell if not sealed properly, takes interior or exterior storage space
For Class B vans and truck campers, Option B is more common — most builders don't want to drill the factory diesel tank. For Class C/A motorhomes and 5th wheels, Option A is convenient because the diesel tank is already large.
The 4 fuel system components
All except the fuel tank are included with the Vvkb Apollo V1 / V2 kit:
| Component | Function | Vvkb spec |
|---|---|---|
| Fuel standpipe (included) | Taps your existing RV diesel tank or a separate fuel tank | 10 standpipes included for tank tapping |
| Fuel filter (included) | Removes particles before they reach the heater | 25-micron inline filter |
| Fuel pump (included) | Meters fuel precisely (clicks audibly) | Solenoid pump, 60–100 cm from heater |
| Fuel line (included) | Connects everything | 2 mm ID (0.08") clear nylon tubing |
Note: The Vvkb V1 / V2 kit does not include a separate fuel tank — you'll either tap your existing RV diesel tank (using the included standpipes) or buy a Vvkb UV-resistant 10 L diesel tank (sold separately).
One mistake to avoid: don't substitute larger fuel line (4 mm or rubber hose). The 2 mm ID is precisely calibrated to match the fuel pump's stroke volume — larger line causes incorrect fuel delivery and weak heat output.
Running costs (fuel + electricity)
Fuel cost (at $4/gallon US diesel):
| Heater | Setting | L/hr | Cost/hr |
|---|---|---|---|
| V1 (2.5KW) | Low / Medium | 0.10–0.17 | $0.11–$0.18 |
| V1 (2.5KW) | High | 0.25 | $0.27 |
| V2 (5KW) | Low / Medium | 0.15–0.30 | $0.16–$0.32 |
| V2 (5KW) | High | 0.47 | $0.50 |
8 hours overnight at medium heat:
- V1: typically $1.20–1.40
- V2: typically $1.80–2.50
Electricity cost:
- 12V × 1.5A average = 18W
- 8 hours overnight = 144 Wh = 0.14 kWh
- At $0.15/kWh: about 2¢ per night
How long does a diesel heater run on a gallon of diesel?
A diesel heater runs 8–38 hours per gallon depending on size and setting:
| Heater | Setting | Run time per gallon |
|---|---|---|
| V1 (2.5KW) | Medium | ~22 hours |
| V1 (2.5KW) | High | ~15 hours |
| V2 (5KW) | Medium | ~13 hours |
| V2 (5KW) | High | ~8 hours |
A 5-gallon (20 L) jerry can will keep your camper warm for 40–110 hours — that's roughly 2–5 nights to over a week of continuous heat, depending on your heater size and how cold it gets.
5 safety rules + honest brand comparison
5 safety rules every camper owner should know
Diesel heaters are safer than propane heaters indoors (sealed combustion, no open flame, no water vapor). But "safer" isn't "zero risk" — these 5 rules cover every install failure Vvkb's support team has seen lead to a real safety incident:
1. Install a CO detector with battery backup Even with sealed combustion, you must have a CO detector in your sleeping area. Sealed chambers fail (cracked exhaust pipe, loose clamp, perforated heat exchanger after 8+ years). A $25 detector is the cheapest insurance you can buy.
2. Keep the exhaust outlet 12+ inches (30+ cm) from any opening The exhaust pipe end must be at least 30 cm away from windows, vents, doors, and your fresh-air intake. Closer than that and exhaust gets sucked back into the cabin under certain wind conditions.
3. Maintain 4–6 inches (10–15 cm) clearance from fuel lines Hot exhaust + fuel line = a fire risk. Route the fuel line on the opposite side of the heater, never bundled with the exhaust.
4. Mount on a non-flammable surface Don't bolt the heater directly to a wood floor or plywood platform. Use a metal mounting plate (often included with the Vvkb kit) or sheet metal under the heater.
5. Test before each cold season Before you rely on the heater for sleeping warmth, run it for 30 minutes during the day with windows open. Check exhaust connection, listen for unusual noise, watch for fuel leaks. Catch problems in the daylight, not at 2 AM in -20°F weather.
Honest brand comparison: Webasto / Eberspächer / Autoterm / Vvkb / Amazon cheap brands
After 30 years of building diesel heaters, here's our honest view of where each brand fits — including where ours sits in the market:
| Brand | Typical 5KW price | Where it fits |
|---|---|---|
| Webasto Air Top 2000 STC | $1,500–2,000 | German engineering gold standard. OEM choice for European RV manufacturers. Worth the price if budget isn't a factor. |
| Eberspächer Airtronic S2 D2L | $1,400–1,800 | Same tier as Webasto. OEM standard for commercial trucks. Slightly quieter than Webasto, otherwise comparable. |
| Autoterm Air 2D (Planar) | $700–900 | Russian-designed mid-tier. Solid build, smaller US service network than Webasto. |
| Vvkb Apollo V2 | $600–700 | Same fit and finish as Webasto, factory-direct pricing skipping the dealer markup. 30 years of diesel heater experience, CE, RoHS, FCC, and E-mark certified. |
| Cheap Amazon "5–8KW" brands (Vevor, Maxpeedingrods, Hcalory) | $80–300 | Same physical units. Thinner aluminum castings (400–500 ton press vs Vvkb's 1,000 ton), generic glow plugs, no altitude compensation. Lifespan typically 1–2 winters vs 8–10 years for Vvkb. |
The honest tradeoff: Webasto and Eberspächer are excellent — if you're spending $2,000 you're getting genuinely superior service network and resale value. But for the same hardware quality (same Kyocera glow plug, same 2520 stainless combustion chamber, same E-mark certification), Vvkb skips the OEM dealer chain and sells direct at less than half the price.
For Amazon cheap brands, the warning is simpler: physics doesn't change with the price tag. A $99 "8KW heater" with the same housing as a 5KW Webasto isn't an 8KW heater — it's a 5KW heater with thinner internals and 1–2 winter lifespan.
Best Vvkb diesel heater for your camper
For 90% of camper owners, the choice is between the Apollo V1 (2.5KW) and Apollo V2 (5KW) air heaters — both share the same construction quality (2520 stainless combustion chamber, Kyocera glow plug, ADC12 die-cast aluminum heat exchanger) and the same certifications (CE, RoHS, FCC, E-mark). The right pick comes down to your RV class and how cold you camp.
Apollo V1 — 2.5KW / 8,500 BTU
Best for: compact builds under 600 cu ft — truck campers, Class B vans (Sprinter / ProMaster / Transit conversions), small motorhomes, teardrop trailers.
- 2.5KW heat output (8,500 BTU)
- Fuel consumption: 0.10–0.25 L/hr
- Works to -40°F (-40°C)
- Auto-adjusts to 11,483 ft (3,500 m) altitude
- Quiet ceramic combustion (Kyocera glow plug)
- Complete kit: heater, controller, remote, fuel pump, fuel filter, exhaust pipe, intake muffler, ducting, mount plate, 10 standpipes, all hardware
- Certified: CE, RoHS, FCC, E-mark
Apollo V1 / V2 diesel air heater → (select your wattage at checkout)
Apollo V2 — 5KW / 16,500 BTU
Best for: full-size RVs 600+ cu ft — Class A motorhomes, Class C, 5th wheels, travel trailers over 20 ft, toy haulers, large overlanding builds.
- 5KW heat output (16,500 BTU)
- Fuel consumption: 0.15–0.47 L/hr
- Works to -51°F (-46°C) — proven in arctic conditions
- Auto-adjusts to 11,483 ft (3,500 m) altitude
- Larger ducting (Ø75mm vs V1's Ø60mm) — better airflow for big cabins
- Improved NVH (noise, vibration, harshness) over V1
- Same complete kit as V1 (with larger duct + fittings)
- Certified: CE, RoHS, FCC, E-mark
Both V1 and V2 use the same product page — select your wattage at checkout.
Portable Diesel Heater — 5KW, zero install
Best for: renters, tent campers, ice fishing, anyone who doesn't want to cut into their RV, or as a secondary heater that moves between rigs.
- 5KW heat output (same as V2)
- Self-contained: built-in fuel tank, battery box, controls
- Iron weather-resistant housing (not plastic — survives snow, rain, cold)
- Wired remote control (adjust temp from your sleeping bag)
- Set up outside, run a flex duct through a window — done in 10 minutes
- One gallon of diesel = ~8 hours of heat
- ⚠️ Not for marine use (exhaust isn't sealed for closed boat cabins)
Apollo C1 — Hydronic water heater (for RVs with onboard hot water)
Best for: Class A/C motorhomes with a wet bath that want to integrate diesel heating with their existing RV plumbing.
The C1 is a diesel water heater (5KW / 17,065 BTU) that heats coolant, which circulates through your RV's existing heat exchanger to deliver cabin warmth + hot water to your shower and sinks. More complex install than air heaters, but replaces the propane water heater entirely.
Apollo C1 diesel water heater →
Vvkb Diesel Hot Water System — All-in-one (heater + water heating + storage)
Best for: large motorhomes (Class A, 5th wheels, luxury overlanders) wanting one diesel system to replace both the propane furnace and the propane water heater — cabin heat, shower hot water, and kitchen hot water from a single integrated unit.
- All-in-one: diesel heater + water heating module + storage tank + controls
- Eliminates 2 propane appliances (saves cabinet space + ends propane refills)
- 5KW heat output, 12V DC
- More complex install than air heaters or C1 alone (best done during a fresh RV build or major refit)
- For boondocking RVers who want fully propane-free living
Vvkb Diesel Hot Water System →
Need help picking?
If you're between V1 and V2, the rule of thumb is: build a 5KW system in any RV that goes camping below -10°F (-23°C) regularly, even if cubic feet would suggest 2.5KW. Cold weather + thin insulation eats more BTU than the calculator says.
If you're choosing between an air heater and a water-based system, start with V1 or V2 unless you specifically want to replace your propane water heater too. Air heaters are simpler to install, easier to service, and cover 90% of camper heating needs.
Shop all Vvkb diesel heaters →
Frequently asked questions
Are diesel heaters good for RVs?
Yes. Diesel heaters give you dry heat, run on cheap fuel ($0.11–0.50 per hour), work to -40°F (-40°C), and don't produce indoor condensation like propane heaters. They've replaced propane and electric heaters in serious camper builds because they solve the three biggest winter camping problems: damp bedding, expensive fuel, and dead batteries in the cold.
Is there a diesel heater that doesn't need electricity?
No diesel heater is truly electricity-free — they all need 12V DC to power the fuel pump, glow plug, and cabin air fan. But the power draw is tiny: 12–60 watts average, which means a 100Ah house battery can run a Vvkb diesel heater for 80+ hours between charges. For practical purposes, off-grid users can run a diesel heater all winter without shore power.
How long does a diesel heater run on a gallon of diesel?
8 to 38 hours per gallon, depending on size and setting:
- Vvkb V1 (2.5KW) on medium: ~22 hours/gallon
- V1 on high: ~15 hours/gallon
- V2 (5KW) on medium: ~13 hours/gallon
- V2 on high: ~8 hours/gallon
A 5-gallon (20 L) jerry can keeps your camper warm for 2–5 nights to over a week of continuous heat.
What are the disadvantages of a diesel heater?
Four real drawbacks: install complexity (4–8 hours of DIY work), electricity dependence (won't run off zero battery), slight exhaust noise at the outdoor outlet, and faint diesel smell during startup (first 2–3 minutes until the heater hits operating temperature). For most camper owners these tradeoffs are worth it for dry heat + cheap fuel + arctic-rated performance.
Are diesel heaters noisy? Will it bother my neighbors?
Yes they make some noise — but less than most RV propane furnaces and far less than a generator. Three sources:
- Combustion (~45–50 dB at the unit): inside the cabin, you hear a soft hum like a quiet bathroom fan
- Fuel pump tick (~30–35 dB at 1 m): a click every 2–5 seconds; faster on high heat
- Exhaust pulse outside (~55–60 dB at 1 m): faint pulse audible within 10 ft of your RV
For perspective: a normal conversation is 60 dB, a refrigerator is 40 dB. Most campground neighbors won't notice unless parked within 20 ft.
Will the exhaust smell during use?
Faint diesel smell during the first 2–3 minutes of startup, then no smell during normal operation. Fresh fuel needs to vaporize and ignite, which produces a brief puff of unburnt exhaust. Once combustion is steady, exhaust is mostly CO2 and water vapor with minimal odor.
If exhaust smells throughout operation, that's a problem — usually partial blockage in the exhaust pipe, water in the fuel, or a worn glow plug. Vvkb's 2520 stainless combustion chamber + Kyocera glow plug minimize incomplete combustion smells.
How long do diesel heaters last?
Vvkb diesel heaters typically last 8–10 years with proper install — 2–5× longer than cheap "5–8KW" Amazon brands (1–2 winters typical). Key factors:
- Combustion chamber: 2520 stainless (Vvkb) vs basic steel (cheap brands)
- Glow plug: Kyocera ceramic (Vvkb) vs generic resistance wire
- Heat exchanger: 1,000-ton press ADC12 aluminum (Vvkb) vs 400–500 ton thinner casting
Lifespan tip: run the heater for 15 minutes monthly during the off-season — keeps the fuel pump primed and prevents fuel line clogs.
Is a diesel heater better than my RV's propane furnace?
For most camping styles, yes — diesel beats propane on cost, dryness, and cold-weather reliability:
| Diesel heater | RV propane furnace | |
|---|---|---|
| Fuel cost (8 hrs) | $1.20–2.50 | $3–6 |
| Heat type | Dry (sealed combustion) | Wet (water vapor indoors) |
| Cold limit | -40°F (-40°C) | ~20°F (-7°C) tank pressure |
| Install | 4–8 hrs DIY (one-time) | Already installed |
Stick with propane if: you only camp at full-hookup sites with cheap propane, don't camp in deep cold, and don't want to install anything new.
Switch to diesel if: you boondock, vanlife, overland, camp below 20°F, or are tired of propane condensation in your cabin.
Ready to keep your camper warm this winter?
Vvkb has been building diesel heaters in China since 1996. Every Apollo unit is CE, RoHS, FCC, and E-mark certified, ships with the complete install kit, and is backed by 30 years of diesel heater experience.
- Compact build (under 600 cu ft)? → Apollo V1 (2.5KW)
- Full-size RV (600+ cu ft)? → Apollo V2 (5KW)
- Don't want to cut into your RV? → Portable Diesel Heater
- Want to replace your propane water heater too? → Diesel Hot Water System
SHOP ALL VVKB DIESEL HEATERS →
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- How to install an engine block heater (step-by-step DIY) — for cold-start engine warming, separate from cabin heat
- ATV block heater: the complete guide — sizing and selection for ATVs and snowmobiles
