Which Hotstart Block Heater is Best for Your Generator? A Quick Guide to Choosing the Right One

three hotstart block heaters, CB, CTM, and TPS heaters

When it comes to protecting your generator and ensuring reliable performance in cold weather, engine block heaters are essential. At Power Systems Plus, we’re here to help you make the right choice when it comes to preheating solutions for your generator. Whether you’re interested in a new generator, need generator service, or are looking for replacement parts like block heaters, understanding the different types of Hotstart heaters will help you choose the right one for your engine’s needs.

Here’s a guide to the different types of Hotstart heaters and what makes each one ideal for specific applications.

1. Thermosiphon Heaters (TPS Series)

A black Hotstart TPS engine block heater with cord

The Thermosiphon Heater is a great starting point if you’re looking for a simple, cost-effective solution. Designed for mid-sized engines, thermosiphon heaters work by heating the coolant and allowing it to circulate naturally through the engine via convection.

  • How It Works: Once the heater warms the coolant, the hot fluid rises, and cooler fluid flows down to the heater, creating a continuous cycle of passive circulation.
  • Best For: Generators and engines that need straightforward, reliable preheating but don’t require active coolant flow.
  • Why Choose TPS: If you need dependable heat distribution without breaking the bank, the TPS is a solid option for keeping your engine warm and ready to start when you need it most.

2. Immersion Block Heaters (CL Series)

A Hotstart CL Engine Coolant Heater

For customers who want to take their preheating to the next level, the CL Series offers a more powerful, targeted heating solution. Immersion heaters are installed directly into the engine block, where they provide fast and efficient heating.

  • How It Works: The CL heater directly heats the coolant or oil within the engine block, reducing engine wear and helping your generator start more easily in cold conditions.
  • Best For: Small to medium-sized engines, or applications where quick warm-ups are needed.
  • Why Choose CL: If you’re looking for faster heat-up times and more direct heat transfer than a thermosiphon, the CL heater will provide the localized power you need.

3. Immersion Block Heaters (CB Series)

A Hotstart CB engine heater with a thermostat

For larger engines and more demanding applications, the CB Series offers even greater heating capacity than the CL. It’s ideal for those who need industrial-grade power to ensure their engines stay warm and ready to go, no matter the weather.

  • How It Works: Similar to the CL heater but with greater power output, the CB heats the coolant inside the engine block and is perfect for larger industrial or commercial engines that require more sustained heating.
  • Best For: Large engines, industrial applications, and heavy-duty generators.
  • Why Choose CB: If you have a larger generator that needs to be ready for operation at a moment’s notice, the CB provides robust heating to keep everything running smoothly.

4. Pump-driven Heaters (CTM Series)

A Hotstart Hotflow CTM Engine Block Heater

For customers with larger or more complex engine systems, the CTM Series offers pump-driven heating for faster and more even heat distribution. These heaters circulate coolant throughout the engine, ensuring that all parts of the engine are evenly warmed.

  • How It Works: Unlike passive systems, the CTM has a built-in pump that actively moves the coolant through the engine, delivering heat more uniformly and faster.
  • Best For: Large, heavy-duty generators, marine engines, or industrial applications where optimal preheating is critical.
  • Why Choose CTM: If you need full-engine preheating with precise temperature control, the CTM provides the most reliable solution for maintaining generator readiness in the toughest conditions.

5. EVRHEAT Heating System

A black Hotstart EVRHEAT preheater

The EVRHEAT system is Hotstart’s most advanced and customizable heating solution. This heater is designed for extreme cold environments or critical power applications where downtime is not an option.

  • How It Works: The EVRHEAT system provides continuous heating with precise control and monitoring, ensuring that your engine stays at the right temperature over long periods.
  • Best For: Engines that need constant heating in extreme environments, such as standby power systems or industrial generators that must always be ready to run.
  • Why Choose EVRHEAT: If your generator is mission-critical, the EVRHEAT system provides the peace of mind that your engine will be ready to go no matter what the weather conditions are.

Which Heater Is Right for You?

At Power Systems Plus, we understand that choosing the right block heater depends on your engine type, generator size, and the conditions in which you operate. Whether you’re a homeowner preparing for cold Oregon winters or a business owner ensuring uninterrupted power for your operations, we’ve got the perfect solution for you.

Not sure which heater is the best fit? Our team is here to help. We’ll guide you through the options and ensure you get the right block heater to keep your generator running smoothly.

Contact Us Today

Looking for expert advice on replacement generator parts or services? Get in touch with Jason B., our service coordinator, or call our sales manager, Joe Walsh at 971-205-7403 for generator installation. Whether you’re looking to upgrade your generator or ensure it stays in peak condition all winter long, Power Systems Plus is your local resource for reliable power solutions.

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