Vvkb Apollo GH5 Gasoline Hot Water System — 5KW 12V

Three heating systems in one unit — hot showers, radiant floor heat, and cabin air, all from your existing gasoline tank. When you drive, your engine's waste heat warms your water for free. No extra fuel burned. At 5KW, the GH5 heats your water and cabin with the engine completely off — no shore power, no engine idling. Your gasoline tank is already on the vehicle. Connect the GH5 directly — no diesel tank, no second fuel type. CE certified. Ships in 7 business days. Three Functions. One Fuel. No Diesel. The Apollo GH5 replaces three separate systems — hot water, floor heating, and cabin air — with one unit running on your existing gasoline supply. Most RVs and campervans carry at least two heating systems: one for the cabin and one for hot water. Each one adds weight, complexity, and usually a propane tank or diesel supply you have to manage separately. The GH5 eliminates all of that. You connect a single fuel line to your gasoline tank. The GH5 does the rest — hot showers, warm floors, and cabin air, all from the same fuel your engine already burns. Hot Water. Warm Floors. Heated Cabin. The GH5 runs one hydronic circuit that feeds three outputs simultaneously — hot water storage, floor heating pipes, and a cabin fan coil. You get a complete living environment from a single unit. Hot Water for Shower and Taps Connect the GH5 to a hot water storage tank — 10–20L for solo or couple use, 20–30L for families or longer trips. The tank is not included, so you choose the size that fits your build. Once heated, water stays hot at your showerhead and faucet without running the engine. Radiant Floor Heating Hot coolant circulates through your floor pipe circuit. Heat rises from the floor up — the most comfortable and even way to warm a cabin, with no blower noise. Cabin Air Heating The included 1.7KW fan coil unit pushes warm air through your living space. Paired with the Controller Pro, you set the temperature and walk away. Your Engine Heats Your Water for Free The GH5 connects directly into your vehicle's engine cooling circuit. While the engine runs, waste heat that would otherwise be lost through the radiator flows through the GH5's heat exchanger instead — warming your water storage tank at zero extra fuel cost. Drive for 30 minutes and your water tank is already warm by the time you park. The GH5 brings it to full temperature and holds it there while you're stopped. When the engine is off, the GH5 switches automatically to active combustion — burning gasoline from your existing tank to maintain heat. No manual switching, no separate controls. Built for Gasoline — Your Tank Is Already on the Vehicle Most RV heaters run on diesel. If your vehicle runs on gasoline, that means a second fuel tank bolted somewhere on your build — one more thing to fill, one more thing to leak, one more thing to explain at the border. The GH5 connects directly to your existing gasoline tank. No diesel supply, no propane cylinder, no extra weight. Why you can't just run a diesel heater on gasoline Gasoline and diesel burn differently — the air-to-fuel ratio, ignition timing, and combustion speed are completely different. Some manufacturers sell modified diesel heaters as gasoline versions. The result is lower output, longer heat-up times, and carbon buildup. The GH5 is calibrated specifically for gasoline combustion from the ground up — same 5KW output, same reliability. Specifications Heat Output 5KW (17,000 BTU/h) Fuel Gasoline Voltage 12V DC (9V–16V) Fuel Consumption 0.30–0.61 L/hr (partial to full power) Electrical Consumption 18–28W (heater unit only, excludes fan coil and pump) Fan Coil Output 1.7KW Operating Temperature -40°F to +140°F (-40°C to +60°C) Total System Weight 19kg Heater Unit Dimensions 214 × 106 × 168mm Certification CE Delivery Ships in 7 business days What's in the Box Everything you need to connect the GH5 to your vehicle is included. You only need to source a hot water storage tank (10–30L, your choice of size). Component Qty Apollo-GH5 main unit — heater pre-mounted to stainless steel heat exchanger tank 1 1.7KW fan coil unit 1 Controller Pro with remote 1 Wiring harness 1 Expansion tank 1 On/off switch 1 Stainless steel flexible exhaust pipe 1 Fuel pump 1 Fuel filter 1 Fuel line 1 Coolant hoses 1 set Brass fittings 1 set Ball valve 1 Hose clamps 1 set Note: Hot water storage tank not included. We recommend 10–20L for 1–2 people, 20–30L for 3–4 people. Installation Overview The GH5 arrives with the heater pre-mounted to the heat exchanger tank — the most complex part of the assembly is already done. A typical installation involves four connections. Step 1 — Mount the main unit Choose a location with access to your fuel line, engine bay, and living space. The heat exchanger tank has screw holes on the base — find a solid mounting surface and bolt it directly into position. Step 2 — Connect to the gasoline tank Run the fuel line from your existing gasoline tank to the GH5 fuel pump. No separate fuel tank required. Step 3 — Connect to the engine cooling circuit Plumb the GH5 into your vehicle's engine coolant loop using the included hoses and brass fittings. Before running the system, make sure all air is purged from the heater hoses and the heater interior — trapped air will prevent proper circulation. Step 4 — Connect the outputs Run coolant lines to your hot water storage tank, floor heating circuit, and fan coil unit. Wire the Controller Pro to the battery and on/off switch. The included system diagram covers all connection points. If you are not experienced with hydronic heating systems, professional installation is recommended. CE Certified and Built-In Safety Protection The Apollo-GH5 is CE certified — tested and compliant for use in vehicles and marine applications across Europe and North America. Three automatic protection systems run in the background whenever the GH5 is operating:No manual intervention required. If a fault occurs, the Controller Pro displays an error code so you know exactly what to address. Overheat protection — if coolant temperature exceeds the safe threshold, the GH5 shuts down automatically Low voltage protection — the system monitors battery voltage and cuts power before your battery is damaged Ignition lockout — if the GH5 fails to ignite twice in succession, it locks out and stops attempting. This prevents unburned fuel from accumulating in the combustion chamber Frequently Asked Questions What's the difference between the Apollo-GH5 and the Apollo-GC5? The GC5 is a gasoline water heater — it heats your engine coolant and cabin, but does not supply domestic hot water for showers or taps. The GH5 is a complete integrated system: it does everything the GC5 does, and adds domestic hot water, radiant floor heating, and a 1.7KW fan coil for cabin air. If you need a shower and warm floors, the GH5 is the right choice. If you only need engine preheating and cabin heat, the GC5 is simpler and lower cost. Can I use the GH5 in a diesel vehicle? The GH5 is calibrated specifically for gasoline combustion — the air-to-fuel ratio and ignition system are set for gasoline, not diesel. If your vehicle runs on diesel, we recommend the Apollo diesel hot water system instead. Using the wrong fuel type will reduce output and cause carbon buildup. Does engine waste heat recovery work automatically while driving? Yes. The GH5 connects directly into your engine's cooling circuit. While the engine runs, waste heat flows through the GH5 heat exchanger and warms your water storage tank automatically — no manual switching required. When you turn the engine off, the GH5 switches to active combustion mode and continues heating from your gasoline tank. The transition is seamless. Is the hot water storage tank included — and what size do I need? The hot water storage tank is not included. You source your own so you can choose the capacity that fits your build and usage. For 1–2 people, a 10–20L (2.6–5.3 gal) tank is sufficient for daily showers and dishwashing. For 3–4 people or extended trips, 20–30L (5.3–7.9 gal) is more comfortable. Use a single-coil calorifier tank designed for hydronic systems. Can it heat water and the cabin at the same time? Yes. The GH5 runs a single hydronic circuit that feeds all three outputs — hot water tank, floor heating pipes, and fan coil — simultaneously. You do not need to choose between hot water and cabin heat. All three can run together from the same heat source. How loud is the GH5? The GH5 is a hydronic system — heat is transferred through liquid coolant, not blown air. The combustion unit itself runs quietly in the background. The 1.7KW fan coil is the main source of airflow noise, and it can be controlled independently. Overall, a hydronic system is significantly quieter than a forced-air heater at equivalent heat output. Does the GH5 work at high altitude? Yes. Vvkb heaters automatically adjust the air-to-fuel ratio as altitude increases, maintaining reliable combustion up to 11,483ft (3,500m). Above that elevation, performance will gradually decrease as available oxygen drops. For most RV and van destinations in North America and Europe, 11,483ft covers virtually all accessible roads and campgrounds. What vehicles is the GH5 compatible with? The GH5 works with any gasoline or petrol-powered vehicle that has an accessible fuel tank and engine cooling circuit — including RVs, campervans, trucks, boats, and motorhomes. It is also compatible with gasoline-electric hybrid vehicles. The system connects to your existing gasoline tank, so no modifications to the fuel supply are required beyond running a fuel line to the GH5 pump. Is it safe to run while sleeping — is there a CO risk? The GH5 uses a sealed combustion system. Combustion air is drawn from outside the vehicle through a dedicated intake, and exhaust gases are discharged outside through the exhaust pipe. Cabin air never mixes with the combustion process. Three automatic safety systems — overheat protection, low voltage cutoff, and ignition lockout — run continuously. As with any fuel-burning appliance in an enclosed space, installing a CO detector is strongly recommended as standard practice. How often does the GH5 need maintenance? An annual inspection is recommended — check the glow plug, clean the combustion chamber, and inspect fuel and coolant connections. Gasoline burns slightly faster than diesel and can leave more residue in the combustion chamber over time, so keeping up with annual servicing will extend the life of the unit significantly. The Controller Pro displays error codes if something needs attention between service intervals. One System. Every Heat You Need. 5KW · 3-in-1 · Gasoline · CE Certified · Ships in 7 Business Days Hot water, warm floors, and cabin heat — all from your existing gasoline tank. ADD TO CART → COMPARE WITH GC5 →