Vvkb Apollo GC5 Gasoline Water Heater — 5KW 12V

Your gasoline tank is already on the vehicle — connect the GC5 directly to it, no diesel tank required. One unit heats your cabin and preheats your engine. You don't need two separate systems. At 5KW (17,000 BTU), you heat a full-size RV or campervan with the engine completely off. CE certified — independently tested and approved, not self-declared. Rated to -40°F (-40°C) — the same temperature range your engine needs protection from. No Diesel Tank. One Fuel Does Everything. The Apollo GC5 runs on your vehicle's existing gasoline tank — no second fuel type, no separate tank to install. Most coolant heaters on the market run on diesel. If your vehicle runs on gasoline, that means a separate tank, a dedicated fuel line, and one more system to maintain. The Apollo GC5 eliminates all of that. You tap a single fuel line from your existing gasoline tank. The heater does the rest — warming your coolant, heating your cabin, and preheating your engine from one fuel source. One Heater. Two Jobs. The Apollo GC5 connects to your vehicle's coolant circuit. One unit handles both cabin heating and engine preheating — with the engine completely off. Job 1 — Warm Your Cabin The GC5 heats your coolant and circulates it through your vehicle's existing heater core. You get warm air through your standard dashboard vents — no engine running required. At 5KW (17,000 BTU), the Apollo GC5 heats a full-size RV cabin or large campervan with the engine completely off. At full output, it burns 0.61 L/hr of gasoline from your existing tank. Job 2 — Preheat Your Engine A cold start on a winter morning wears your engine more than hours of normal driving. The Apollo GC5 pre-warms your coolant before you turn the key — your engine starts warm, lubricated, and ready. You set a timer. The GC5 runs 20–30 minutes before departure. By the time you get in, the cabin is warm and the engine is already at operating temperature. Automatic Temperature Management The Apollo GC5 regulates output automatically between 2.5KW (partial load) and 5KW (full load). You set the target temperature — the heater adjusts fuel and power to maintain it without manual input. How a Gasoline Water Heater Actually Works A gasoline water heater heats your vehicle's coolant — not your cabin air directly. The warm coolant circulates through a heater core or dedicated heat exchanger, where a fan distributes the heat evenly across your cabin. The Apollo GC5 combusts gasoline and transfers that heat to the coolant through its internal heat exchanger. The built-in circulation pump keeps the coolant moving through the circuit. You get consistent warmth throughout the entire cabin — not just near a single outlet. Because the same coolant circuit connects to your engine block, the Apollo GC5 warms your engine at the same time. One unit running on one fuel does the work of two separate systems. Where the Apollo GC5 Works Best RV & Motorhomes The Apollo GC5 is built for gasoline motorhomes — and most Class A, B, and C motorhomes on North American roads run on gasoline. You get full cabin heat with the engine off, pulling from the same tank your RV engine uses. On cold mornings, the timer function pre-warms your engine and cabin before you start the day. At 5KW (17,000 BTU), the GC5 handles the heating load of a full-size motorhome — one fuel, one system, no propane backup required for heating. Camper Vans & Conversions The Apollo GC5 main unit weighs 2.9kg and connects directly to your gasoline tank — no separate fuel tank eating into your van build. The coolant circuit integrates with your van's existing heater core or a dedicated heat exchanger, distributing warmth evenly across the cabin. You get 4-season capability without a second fuel supply on board. Trucks & Overlanding The Apollo GC5 connects to your truck's coolant system and pulls fuel from your existing gasoline tank. You heat your cab and protect your engine in the same overnight run. Cold mornings on an overland trip mean cold engines and slow starts. With the GC5 set on a timer, your engine arrives at operating temperature before you turn the key. Boats & Marine Vessels Most recreational powerboats run on gasoline — the Apollo GC5 connects directly to your onboard fuel supply with no separate diesel tank. You get cabin heat and engine coolant preheating from a single unit weighing 2.9kg. For fishing boats, cruisers, and liveaboards in cold climates, that means warm mornings without running the engine at the dock. The GC5 integrates with your boat's freshwater cooling circuit the same way it does with a vehicle — sealed combustion, exhaust routed outside, CE certified for safety in enclosed spaces. Specifications Fuel Type Gasoline (petrol) Heat Output — Full Load 5.2KW (17,700 BTU/hr) Heat Output — Partial Load 2.5KW (8,530 BTU/hr) Voltage 12V DC Working Voltage Range 10.5V–15V Power Consumption — Full Load 28W (heater unit, excludes pump & fan) Power Consumption — Partial Load 18W (heater unit, excludes pump & fan) Fuel Consumption — Full Load 0.61 L/hr (0.16 GPH) Fuel Consumption — Partial Load 0.30 L/hr (0.08 GPH) Operating Temperature -40°F to +140°F (-40°C to +60°C) Heat Exchanger Pressure 0.4–2.5 bar Minimum Coolant Circuit Volume 4.0L Minimum Coolant Flow Rate 250 L/hr Circulation Pump Flow Rate ~900 L/hr (at 0.1 bar) Circulation Pump Power 14W Unit Dimensions 214 × 106 × 168 mm Unit Weight 2.9kg (6.4 lb) Certifications CE What's in the Box Everything you need for a standard installation is included. You connect the coolant hoses to your existing coolant circuit and the fuel line to your gasoline tank — no additional parts required for most RV and motorhome installations. Apollo GC5 heater unit with integrated circulation pump Wiring harness Fuel pump Fuel filter Stainless steel corrugated exhaust pipe Exhaust muffler Combustion air intake pipe Coolant hoses Hose clamps (multiple sizes) Mounting bracket and mounting plate Complete mounting hardware and zip ties Note: Van conversions without an existing heater core may require a separate heat exchanger/blower unit to distribute warm air into the cabin. Frequently Asked Questions Does the Apollo GC5 provide hot water for showers or taps? No — the Apollo GC5 heats your vehicle's coolant circuit for cabin heating and engine preheating, not domestic water for showers or taps. If you need hot water for showers on board, our Diesel Hot Water System provides both cabin heating and domestic hot water in one unit. A gasoline version is currently in development. Does it connect to my existing heater core, or do I need extra components? For most RVs and motorhomes, the Apollo GC5 connects directly to your existing coolant circuit and heater core — no extra components needed. The kit includes all hoses and fittings for a standard installation. For van conversions without an existing heater core, you need a separate heat exchanger and blower to distribute warm air inside the cabin. Our Vvkb Cab Heater connects directly to the GC5 coolant circuit and is designed exactly for this use case. How much battery power does it draw overnight? The Apollo GC5 heater unit draws 28W at full load and 18W at partial load. Add the circulation pump at 14W — total draw is approximately 42W at full output, or 3.5A at 12V. A standard 100Ah auxiliary battery provides roughly 25 hours of runtime at full load. In practice, the heater modulates between partial and full output, so real overnight draw is significantly less. Is it safe to run while sleeping? Yes. The Apollo GC5 uses a sealed combustion chamber — combustion air comes from outside the vehicle, and all exhaust exits through the exhaust pipe. No combustion gases enter your living space. Failed ignition attempts trigger an automatic lockdown, cutting fuel before gases can accumulate. We still recommend installing a CO detector in any vehicle with a combustion heater. Can I install the Apollo GC5 on a boat? Yes. The Apollo GC5 integrates with a boat's freshwater cooling circuit using the same connection method as a vehicle installation. All combustion is sealed, exhaust routes outside, and the unit is CE certified for use in enclosed spaces. Most recreational powerboats run on gasoline — you tap the same fuel supply your engine uses, with no separate diesel tank required on board. What is the difference between a gasoline water heater and a gasoline air heater? A gasoline water heater heats your vehicle's coolant. That warm coolant circulates through a heater core or heat exchanger to warm your cabin — and can also preheat your engine. A gasoline air heater burns fuel to heat air directly, which is then blown into the cabin through a dedicated outlet. Air heaters are simpler to install; water heaters distribute heat more evenly and offer the engine preheat function. If you need cabin heating only, the Apollo G1 gasoline air heater is worth comparing. What maintenance does the Apollo GC5 need? Plan for an annual inspection of the combustion chamber, fuel filter, and coolant connections — standard practice for any combustion heating system. Replace the fuel filter once a year. Run the heater at full output for 5–10 minutes before each shutdown to burn off residue in the combustion chamber. Check coolant levels seasonally and flush the coolant circuit according to your vehicle manufacturer's schedule. One Fuel. Two Jobs. Zero Compromise. CE certified · Free shipping · 2-year warranty available NEED AIR HEATING ONLY? VIEW APOLLO G1 → FULL TECHNICAL DOCUMENTATION →