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engine preheater

Apollo coolant heater kit with circulation pump, hoses and fuel standpipe for engine preheat installation

Sep 27, 2026

How to Plumb a Coolant Heater: 3 Layouts That Work
Plumb a coolant heater for engine preheat or cabin heat: three layouts, why the thermostat matters, how to bleed air and check flow.

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Pickup truck plugged into an engine block heater on a snowy winter morning

Jul 18, 2026

How Does an Engine Block Heater Work?
An engine block heater warms your coolant before you start, so your engine fires fast and wears less in the cold. Here's how each type works, how long to plug in, and how to pick the right one for your vehicle.

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Blog posts

Apollo coolant heater kit with circulation pump, hoses and fuel standpipe for engine preheat installation
coolant heater / diesel heater / engine preheater / gasoline heater / heater installation / hydronic heater

How to Plumb a Coolant Heater: 3 Layouts That Work
Plumb a coolant heater for engine preheat or cabin heat: three layouts, why the thermostat matters, how to bleed air and check flow.
Webasto Gasoline Heater Alternatives: Air Top 2000 STC vs Espar S3 vs Apollo G1
gasoline heater / van heater

Webasto Gasoline Heater Alternatives: Air Top 2000 STC vs Espar S3 vs Apollo G1
Webasto's gasoline heater, the Air Top 2000 STC, sells for about $1,299 as a basic kit and is rated to 5,000 ft (1,...
Gasoline parking heater cutaway showing blower, heat exchanger, combustion chamber with Kyocera glow plug, and fuel pump
Apollo G1 / Apollo GC5 / Apollo GH5 / camper heater / gasoline heater / gasoline parking heater / RV heater / RV heating guide

Gasoline RV Heaters: Apollo G1, GC5 & GH5 for Vans, Campers, and Motorhomes
A complete buyer's guide to gasoline heaters for your RV. Compare the Vvkb Apollo G1 air heater, GC5 water heater, and GH5 3-in-1 hot water system — specs, real overnight fuel costs, install time, and a decision tree to pick the right one for your van, camper, or motorhome.

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