{"product_id":"gasoline-water-heater-apollo-gc5","title":"Vvkb Apollo GC5 Gasoline Water Heater — 5KW 12V","description":"\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eYour gasoline tank is already on the vehicle — connect the GC5 directly to it, no diesel tank required.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOne unit heats your cabin and preheats your engine. You don't need two separate systems.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAt 5KW (17,000 BTU), you heat a full-size RV or campervan with the engine completely off.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCE certified — independently tested and approved, not self-declared.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRated to -40°F (-40°C) — the same temperature range your engine needs protection from.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eNo Diesel Tank. One Fuel Does Everything.\u003c\/h2\u003e\n\u003cp\u003eThe Apollo GC5 runs on your vehicle's existing gasoline tank — no second fuel type, no separate tank to install.\u003c\/p\u003e\n\u003cp\u003eMost 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.\u003c\/p\u003e\n\u003cp\u003eYou 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.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"Vvkb Apollo GC5 gasoline water heater installed in vehicle engine bay showing coolant IN\/OUT connections and mounting bracket\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1623\/1847\/files\/vvkb-apollo-gc5-gasoline-water-heater-installed.jpg?v=1777443469\"\u003e\u003c\/p\u003e\n\u003ch2\u003eOne Heater. Two Jobs.\u003c\/h2\u003e\n\u003cp\u003eThe Apollo GC5 connects to your vehicle's coolant circuit. One unit handles both cabin heating and engine preheating — with the engine completely off.\u003c\/p\u003e\n\u003ch3\u003eJob 1 — Warm Your Cabin\u003c\/h3\u003e\n\u003cp\u003eThe 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.\u003c\/p\u003e\n\u003cp\u003eAt 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.\u003c\/p\u003e\n\u003ch3\u003eJob 2 — Preheat Your Engine\u003c\/h3\u003e\n\u003cp\u003eA 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.\u003c\/p\u003e\n\u003cp\u003eYou 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.\u003c\/p\u003e\n\u003ch3\u003eAutomatic Temperature Management\u003c\/h3\u003e\n\u003cp\u003eThe 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.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"Apollo GC5 gasoline water heater exploded view showing internal combustion chamber, heat exchanger and component layout\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1623\/1847\/files\/vvkb-apollo-gc5-gasoline-water-heater-exploded-view.jpg?v=1777443469\"\u003e\u003c\/p\u003e\n\u003ch2\u003eHow a Gasoline Water Heater Actually Works\u003c\/h2\u003e\n\u003cp\u003eA 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.\u003c\/p\u003e\n\u003cp\u003eThe 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.\u003c\/p\u003e\n\u003cp\u003eBecause 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.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"Apollo GC5 gasoline water heater showing dual coolant connection ports for vehicle hydronic heating system\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1623\/1847\/files\/vvkb-apollo-gc5-gasoline-water-heater-coolant-ports.jpg?v=1777443469\"\u003e\u003c\/p\u003e\n\u003ch2\u003eWhere the Apollo GC5 Works Best\u003c\/h2\u003e\n\u003ch3\u003eRV \u0026amp; Motorhomes\u003c\/h3\u003e\n\u003cp\u003eThe Apollo GC5 is built for gasoline motorhomes — and most Class A, B, and C motorhomes on North American roads run on gasoline.\u003c\/p\u003e\n\u003cp\u003eYou 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.\u003c\/p\u003e\n\u003cp\u003eAt 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.\u003c\/p\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg style=\"float: none;\" alt=\"Pickup truck camper in snow-covered forest in winter — the Vvkb Apollo GC5 gasoline water heater heats the cab and preheats the engine overnight\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1623\/1847\/files\/RV_heater.jpg?v=1613670694\"\u003e\u003c\/div\u003e\n\u003ch3\u003eCamper Vans \u0026amp; Conversions\u003c\/h3\u003e\n\u003cp\u003eThe Apollo GC5 main unit weighs 2.9kg and connects directly to your gasoline tank — no separate fuel tank eating into your van build.\u003c\/p\u003e\n\u003cp\u003eThe 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.\u003cmeta charset=\"utf-8\"\u003e\u003c\/p\u003e\n\u003ch3\u003eTrucks \u0026amp; Overlanding\u003c\/h3\u003e\n\u003cp\u003eThe 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.\u003c\/p\u003e\n\u003cp\u003eCold 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.\u003c\/p\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg style=\"float: none;\" alt=\"Pickup truck camper in snow-covered forest in winter — the Vvkb Apollo GC5 gasoline water heater heats the cab and preheats the engine overnight\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1623\/1847\/files\/Five_precautions_for_diesel_heater_installation.jpg?v=1614347051\"\u003e\u003c\/div\u003e\n\u003ch3\u003eBoats \u0026amp; Marine Vessels\u003c\/h3\u003e\n\u003cp\u003eMost recreational powerboats run on gasoline — the Apollo GC5 connects directly to your onboard fuel supply with no separate diesel tank.\u003c\/p\u003e\n\u003cp\u003eYou 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.\u003c\/p\u003e\n\u003cp\u003eThe 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.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003c\/th\u003e\n\u003cth\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFuel Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGasoline (petrol)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHeat Output — Full Load\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5.2KW (17,700 BTU\/hr)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHeat Output — Partial Load\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2.5KW (8,530 BTU\/hr)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVoltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e12V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWorking Voltage Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10.5V–15V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Consumption — Full Load\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e28W (heater unit, excludes pump \u0026amp; fan)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Consumption — Partial Load\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e18W (heater unit, excludes pump \u0026amp; fan)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFuel Consumption — Full Load\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.61 L\/hr (0.16 GPH)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFuel Consumption — Partial Load\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.30 L\/hr (0.08 GPH)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-40°F to +140°F (-40°C to +60°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHeat Exchanger Pressure\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.4–2.5 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMinimum Coolant Circuit Volume\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4.0L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMinimum Coolant Flow Rate\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e250 L\/hr\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCirculation Pump Flow Rate\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e~900 L\/hr (at 0.1 bar)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCirculation Pump Power\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e14W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eUnit Dimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e214 × 106 × 168 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eUnit Weight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2.9kg (6.4 lb)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCertifications\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCE\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cimg alt=\"Vvkb Apollo GC5 5KW gasoline water heater elevated view with product label and coolant outlet connections\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1623\/1847\/files\/vvkb-apollo-gc5-gasoline-water-heater-top-angle.jpg?v=1777443469\"\u003e\u003c\/p\u003e\n\u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n\u003cp\u003eEverything 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.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eApollo GC5 heater unit with integrated circulation pump\u003c\/li\u003e\n\u003cli\u003eWiring harness\u003c\/li\u003e\n\u003cli\u003eFuel pump\u003c\/li\u003e\n\u003cli\u003eFuel filter\u003c\/li\u003e\n\u003cli\u003eStainless steel corrugated exhaust pipe\u003c\/li\u003e\n\u003cli\u003eExhaust muffler\u003c\/li\u003e\n\u003cli\u003eCombustion air intake pipe\u003c\/li\u003e\n\u003cli\u003eCoolant hoses\u003c\/li\u003e\n\u003cli\u003eHose clamps (multiple sizes)\u003c\/li\u003e\n\u003cli\u003eMounting bracket and mounting plate\u003c\/li\u003e\n\u003cli\u003eComplete mounting hardware and zip ties\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eNote: Van conversions without an existing heater core may require a separate heat exchanger\/blower unit to distribute warm air into the cabin.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1623\/1847\/files\/vvkb-apollo-gc5-gasoline-water-heater-complete-kit_10bbae51-5aa7-4e00-a902-1e4eed1d032c.jpg?v=1780428732\" alt=\"Vvkb Apollo GC5 gasoline water heater complete kit including heater unit, circulation pump, hoses, exhaust pipe, wiring harness and mounting hardware\"\u003e\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eDoes the Apollo GC5 provide hot water for showers or taps?\u003c\/h3\u003e\n\u003cp\u003eNo — the Apollo GC5 heats your vehicle's coolant circuit for cabin heating and engine preheating, not domestic water for showers or taps.\u003c\/p\u003e\n\u003cp\u003eIf you need hot water for showers on board, our \u003ca href=\"https:\/\/www.rvheater.com\/collections\/vvkb-hydronic-coolant-heater\/products\/vvkb-diesel-hot-water-system-12v-5kw\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eDiesel Hot Water System\u003c\/a\u003e provides both cabin heating and domestic hot water in one unit. A gasoline version is currently in development.\u003c\/p\u003e\n\u003ch3\u003eDoes it connect to my existing heater core, or do I need extra components?\u003c\/h3\u003e\n\u003cp\u003eFor 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.\u003c\/p\u003e\n\u003cp\u003eFor van conversions without an existing heater core, you need a separate heat exchanger and blower to distribute warm air inside the cabin. Our \u003ca href=\"https:\/\/www.rvheater.com\/products\/vvkb-utv-cab-heater\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eVvkb Cab Heater\u003c\/a\u003e connects directly to the GC5 coolant circuit and is designed exactly for this use case.\u003c\/p\u003e\n\u003ch3\u003eHow much battery power does it draw overnight?\u003c\/h3\u003e\n\u003cp\u003eThe 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.\u003c\/p\u003e\n\u003cp\u003eA 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.\u003c\/p\u003e\n\u003ch3\u003eIs it safe to run while sleeping?\u003c\/h3\u003e\n\u003cp\u003eYes. 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.\u003c\/p\u003e\n\u003cp\u003eFailed 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.\u003c\/p\u003e\n\u003ch3\u003eCan I install the Apollo GC5 on a boat?\u003c\/h3\u003e\n\u003cp\u003eYes. 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.\u003c\/p\u003e\n\u003cp\u003eMost recreational powerboats run on gasoline — you tap the same fuel supply your engine uses, with no separate diesel tank required on board.\u003c\/p\u003e\n\u003ch3\u003eWhat is the difference between a gasoline water heater and a gasoline air heater?\u003c\/h3\u003e\n\u003cp\u003eA 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.\u003c\/p\u003e\n\u003cp\u003eA 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 \u003ca href=\"https:\/\/www.rvheater.com\/products\/gasoline-air-heater-apollo-g1\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eApollo G1 gasoline air heater\u003c\/a\u003e is worth comparing.\u003c\/p\u003e\n\u003ch3\u003eWhat maintenance does the Apollo GC5 need?\u003c\/h3\u003e\n\u003cp\u003ePlan 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.\u003c\/p\u003e\n\u003cp\u003eRun 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.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv style=\"background-color: #0b0069; padding: 40px 32px; border-radius: 4px; margin-top: 40px; text-align: center;\"\u003e\n\u003ch2 style=\"color: #ffffff; font-size: 22px; margin-bottom: 8px;\"\u003eOne Fuel. Two Jobs. Zero Compromise.\u003c\/h2\u003e\n\u003cp style=\"color: #ffffff; opacity: 0.85; font-size: 15px; margin-bottom: 28px;\"\u003eCE certified  ·  Free shipping  ·  2-year warranty available\u003c\/p\u003e\n\u003ca href=\"https:\/\/www.rvheater.com\/products\/gasoline-air-heater-apollo-g1\" style=\"display: inline-block; background-color: #b82c2b; color: #ffffff; padding: 14px 28px; text-decoration: none; font-weight: bold; font-size: 14px; border-radius: 3px; margin: 6px;\"\u003e NEED AIR HEATING ONLY? VIEW APOLLO G1 → \u003c\/a\u003e \u003ca href=\"https:\/\/www.vvkb.com\/gasoline-heater\/apollo-gc5-gasoline-water-heater-2\/\" style=\"display: inline-block; background-color: transparent; color: #ffffff; padding: 14px 28px; text-decoration: none; font-weight: bold; font-size: 14px; border-radius: 3px; border: 2px solid #ffffff; margin: 6px;\"\u003e FULL TECHNICAL DOCUMENTATION → \u003c\/a\u003e\n\u003c\/div\u003e","brand":"vvkb","offers":[{"title":"Default Title","offer_id":42384316006482,"sku":null,"price":939.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1623\/1847\/files\/vvkb-apollo-gc5-gasoline-water-heater-front-view_5b25a3a0-f22e-44c6-8bcc-59985bc91b6a.jpg?v=1777443792","url":"https:\/\/www.rvheater.com\/products\/gasoline-water-heater-apollo-gc5","provider":"Vvkb","version":"1.0","type":"link"}