Selecting the right gas heating system for your campervan isn’t about picking the loudest or cheapest unit—it’s about balancing safety, thermal comfort, energy autonomy, and integration with your vehicle’s layout and usage patterns. Unlike home central heating, campervan gas heaters operate in confined, mobile, and often poorly insulated spaces where combustion byproducts, condensation, and power constraints demand meticulous attention. Over 72% of European campervan owners report dissatisfaction with their first heater due to poor airflow distribution, excessive noise, or unexpected propane consumption. This guide distills field-tested insights from van builders, certified LPG technicians, and long-term overlanders to help you make a confident, future-proof decision.
1. Understand Your Heating Needs—Beyond Temperature Ratings
Manufacturers often advertise “up to 4.5 kW” output—but that figure is measured under ideal lab conditions: 20°C ambient, no wind, perfect ventilation, and full gas pressure. In reality, your heater’s effective output depends on three interdependent variables: insulation quality, air exchange rate, and thermal mass. A well-insulated, modern campervan (U-value ≤ 0.3 W/m²K) may need only 1.2–1.8 kW to maintain 18°C overnight at -5°C outside. An older conversion with single-glazed windows and uninsulated floor may require 3.0+ kW just to prevent freezing pipes.
Start by calculating your *actual* heat loss:
- Roof & walls: Multiply surface area (m²) × U-value × ΔT (difference between target interior and coldest expected exterior temp)
- Floor: Add 15–25% more due to ground conduction (especially on concrete or damp soil)
- Windows & doors: Add 30–60% extra for each standard double-glazed window; up to 100% for single-glazed or sliding doors
Then add a 20% safety margin. Most compact campervans (under 6 m) fall into the 1.5–2.5 kW range. Oversizing leads to short-cycling, uneven heating, increased condensation, and premature wear. Undersizing forces continuous operation, draining batteries and straining regulators.
Tip: Never rely solely on manufacturer BTU/kW claims. Instead, check independent test reports from Caravan & Motorhome Club or ADAC—they measure real-world cabin temperature rise over 90 minutes at -10°C.2. Gas Compatibility & Safety Systems—Non-Negotiables
Campervan gas heaters run on either butane (C₄H₁₀), propane (C₃H₈), or mixed LPG (Liquefied Petroleum Gas). Butane vaporises poorly below 0°C and is unsuitable for winter use. Propane works reliably down to -42°C but requires higher-pressure regulators (typically 37 mbar vs. butane’s 28 mbar). In France and much of Europe, most refill stations supply propane-enriched LPG (often labelled “GPL” or “Autogas”), not pure butane canisters. Using a butane-only heater with propane risks flame lift-off, incomplete combustion, and dangerous CO buildup.
Safety systems must be non-negotiable—not optional extras:
- Oxygen depletion sensor (ODS): Shuts off gas if oxygen drops below 18.5%—critical in sealed cabins
- Flame failure device (FFD): Cuts gas within 10 seconds if pilot or main flame extinguishes
- Overheat protection: Thermal cut-out triggered at ≥120°C at heat exchanger outlet
- Exhaust gas monitoring: Required for all CE-certified heaters sold in EU since 2021 (EN 50131-1)
Crucially, all certified campervan heaters must comply with EN 15287-1:2017 (gas-fired space heaters for mobile dwellings) and carry the CE mark with notified body number (e.g., 0197, 1491). Avoid units marked “for leisure vehicles” without explicit EN 15287-1 certification—even if they look identical to approved models.
“Every unvented gas heater installed in a campervan must have redundant safety logic: two independent ODS circuits, dual thermocouples, and automatic purge before ignition. If it doesn’t list these in its technical datasheet, it’s not fit for purpose.” — Jean-Luc Moreau, Senior Engineer, CERTIF GAS (French LPG Certification Body)
3. Installation Realities: Space, Ventilation, and Power
Unlike fixed installations, campervan heaters demand careful spatial planning. You’ll need three distinct zones:
- Combustion chamber: Must be isolated from living space with fire-rated (EI60) bulkheads; never mounted inside cabinets or under beds
- Intake/exhaust ducting: Requires minimum 100 mm diameter rigid aluminium or stainless steel ducts (no flexible hose beyond 30 cm); intake and exhaust outlets must be ≥300 mm apart and away from vents, windows, or wheel arches
- Control zone: Thermostat and control panel placed in stable airflow (not near ceiling or floor), away from direct sunlight or drafts
Power requirements are equally critical. Modern digital heaters (e.g., Truma Combi 6, Webasto Air Top Evo) draw 12V DC during ignition (up to 8 A surge) and 0.8–1.2 A continuously while running. Older piezo-ignition models avoid battery drain but lack precise thermostatic control. Always wire directly to the starter battery via a dedicated 2.5 mm² cable with 15 A fuse—never through the fusebox or cigarette lighter socket.
| Heater Type | Average Power Draw (Running) | Ignition Method | Ducting Requirements | Max Continuous Runtime (on 100Ah AGM) |
|---|---|---|---|---|
| Truma Combi 6 | 1.1 A | Electronic (12V) | Rigid 100 mm intake + 80 mm exhaust | ≈ 52 hours |
| Webasto Air Top Evo 40 | 0.9 A | Electronic (12V) | Rigid 80 mm intake + 60 mm exhaust | ≈ 65 hours |
| Propex HS2000 | 0.4 A | Piezo (no power) | Flexible ducting permitted (max 1.5 m) | Unlimited (but manual control) |
| Alde 3020 Compact | 1.8 A (includes pump) | Electronic (12V) | No ducting (water-heated radiator) | ≈ 32 hours |
4. Real-World Performance: A Case Study from the Pyrenees
In January 2023, Marie Dubois converted a 2008 Renault Master into a four-season campervan for her work as a remote forestry consultant. She initially installed a budget €299 “universal” gas heater advertised as “2.8 kW, CE certified”. Within three weeks, she experienced repeated flameouts during high winds, visible soot on interior walls, and a persistent metallic odour. A certified technician found the unit lacked an ODS, used non-compliant flexible ducting routed through a wooden floor cavity, and had no overheat protection. It was operating at 42% efficiency—far below the EN 15287-1 minimum of 65%.
She replaced it with a Truma Combi 6 (2.0 kW nominal, 1.7 kW net), installed with rigid ducts, external wall penetration, and a separate 12V circuit fused at 20 A. She added 40 mm PIR insulation to walls/roof and triple-glazed acrylic windows. Result: At -8°C outside, she maintains 19°C interior with 2.1 kg propane consumed over 48 hours—well within her 6 kg refill cycle. Condensation dropped by 80%, and the heater now cycles only 2–3 times per hour instead of continuously.
Her key lesson: “The heater didn’t fail because it was ‘cheap’. It failed because it wasn’t designed for dynamic, low-air-volume environments. Certification matters more than brand recognition.”
5. Step-by-Step Selection Checklist
Follow this sequence—do not skip steps—to eliminate mismatched or unsafe choices:
- Calculate real heat loss using your van’s dimensions, insulation specs, and local winter minima
- Verify EN 15287-1:2017 certification—check product label and manufacturer’s EU Declaration of Conformity
- Confirm gas type compatibility with your region’s standard LPG blend (propane-dominant in most of Europe)
- Measure available installation space—including clearance for ducting, service access, and fire separation
- Assess electrical capacity: Confirm 12V system can handle startup surge and sustained draw (use clamp meter test)
- Review service network: Does your country have authorised Truma/Webasto/Alde technicians within 150 km?
- Compare warranty terms: Look for minimum 2-year parts/labour coverage—not just “12 months limited”
6. FAQ
Can I install a gas heater myself?
No. In France, Germany, the UK, and most EU countries, gas appliance installation in mobile dwellings must be performed by a certified professional holding current Qualigaz, TÜV Gas, or Gas Safe registration. DIY installation voids insurance, violates building codes, and risks carbon monoxide poisoning. Even routing ducts incorrectly compromises safety certification.
Do I need both gas and electric heating?
Not necessarily—but highly advisable for resilience. A gas heater provides primary heat off-grid; a 300–500 W ceramic fan heater (plugged into shore power or inverter) handles quick warm-ups or supplements during extended cloudy periods when solar charging is low. Avoid combining gas and electric heaters in the same ducting—they create pressure imbalances and condensation traps.
Why do some heaters require annual servicing while others don’t?
It’s not about the heater—it’s about regulatory compliance. EN 15287-1 mandates annual inspection of all gas-fired appliances in mobile homes to verify burner condition, gas pressure, ODS function, and duct integrity. This is a legal requirement, not a manufacturer upsell. Skipping it invalidates your insurance and may breach rental platform policies (e.g., Yescapa, CamperDays).
Conclusion
Your campervan’s heating system is the quiet foundation of comfort, safety, and seasonal freedom. Choosing wisely means looking past marketing wattage and focusing on certification integrity, real-world thermal behaviour, and installation discipline. The difference between a heater that hums softly through a mountain winter and one that coughs smoke into your sleeping compartment isn’t found in the brochure—it’s embedded in the engineering, the standards compliance, and the respect for physics that governs confined-space combustion. Take time to calculate your actual needs. Insist on documented EN 15287-1 certification. Partner with a qualified installer—not just a convenient one. And remember: in mobile living, reliability isn’t a feature. It’s the baseline.
💬 Your experience shapes others’ journeys. Share your heater choice, installation challenges, or winter performance tips in the comments—we curate real insights for our next deep-dive update.
