Thermosiphon circulation heaters are a passive heating system that circulates coolant by thermal convection. Heaters are installed at the lowest point in a system, warm the coolant, and use thermal convection to circulate the coolant within the system. The result is reliable engine pre-heating that helps improve starting performance, reduce cold start stress, and keeps equipment ready for operation.
Benefits of a Thermosiphon Heater
Simple Operation
Using natural convection to circulate coolant eliminates the need for an electric pump. With fewer moving parts, thermosiphon heaters provide a simple, reliable solution for engine pre-heating.
Robust & Reliable
Phillips & Temro circulation heaters are engineered with durable materials and construction with dual integrated thermostats for maximum reliability. Our proven thermosiphon heaters help deliver long lasting performance while reducing warranty related issues, and lowering overall cost of ownership.
Designed for Many Applications
Circulation heaters provide effective engine preheating for agriculture, heavy duty, construction, power generation, and other engine driven equipment.
Choosing a Heater
Heaters are recommended around the total wattage needed for your application. Wattage is based on engine size (L), minimum ambient temperature, and how quickly the coolant needs to be at operating temperature. View this chart for more info.
A proven, versatile heating solution for everyday engine preheating. The tank heater offers a straightforward combination of flexible power options, thermostat ranges, and durable construction, with simple installation or field replacement.
APPLICATIONS
- Power generation
- Agricultural
- La construction
- Compressors
- Heavy duty equipment
FEATURES
- Regulating thermostat
- Safety thermostat
- Aluminum construction
- Flexible mounting options
BENEFITS
- Reliable cold starts
- Simple operation
- Flexible configurations
- Built in protection
- Easy installation
SPECIFICATIONS
- Watts
- 750 – 2250W
- Voltage
- 120V & 240V
- Hose Connections
- 5/8″ or 3/4″
- Certifications
- UL and CSA
A compact, high output thermosiphon heater for power generation and industrial engines. GenTherm combines controlled coolant heating, overheat protection and rugged construction in a simple pump-free design.
APPLICATIONS
- Diesel generator sets
- Gas generator sets
- Industrial engines
FEATURES
- Regulating thermostat
- Safety thermostat
- Cast aluminum housing
- Integrated mounting holes
- Nylon check valve
BENEFITS
- High output preheating
- Protection contre la surchauffe
- Durable performance
- Simple mounting
SPECIFICATIONS
- Watts
- 3000 – 4350W
- Voltage
- 240V & 277V
- Hose Connections
- 3/4″ NPT
- Certifications
- UL
A durable thermosiphon heater for industrial engines 14 liters and larger. High Capacity models provide long life heating elements, flexible temperature control and serviceable components for demanding engine preheating.
APPLICATIONS
- Industrial equipment
- Engines 14 liters+
FEATURES
- Low watt density elements
- Overheat thermostat
- Optional regulating thermostat
- Replaceable heating element
- Nylon check valve
BENEFITS
- Long element life
- Protection contre la surchauffe
- Temperature flexibility
- Easy field service
SPECIFICATIONS
- Watts
- 1500 – 4000W
- Voltage
- 120V & 240V
- Hose Connections
- 1″ NPT
- Certifications
- UL and CSA
A compact thermosiphon heater for industrial, power generation and vehicle applications. ThermoStart pairs adjustable thermostat control with broad power options to support precise, dependable engine preheating.
APPLICATIONS
- Industrial equipment
- Power generation
- Light duty vehicles
- Heavy duty vehicles
FEATURES
- Adjustable thermostat
- Manual reset protection
- Aluminum housing
- Vertical mounting
- Mounting kit included
BENEFITS
- Precise temperature control
- Protection contre la surchauffe
- Compact installation
- Application flexibility
SPECIFICATIONS
- Wattage Range
- 2000 – 4360W
- Voltage
- 120, 208 or 240V
- Thermostat
- 32 to 176°F
- Certifications
- UL
A compact thermosiphon heater built for convenient new or retrofit installation. Series 8000 combines flexible mounting, adaptable plumbing and a protected detachable power connection for dependable equipment preheating.
APPLICATIONS
- Light duty vehicles
- Off road
- Industriel
- Agricultural
FEATURES
- Universal mounting strap
- Integral check valve
- 18″ or 60″ replacement cord
- Safety thermostat
BENEFITS
- Easy installation
- Flexible plumbing
- Connection protection
- Protection contre la surchauffe
SPECIFICATIONS
- Watts
- 750 – 1500W
- Voltage
- 120V
- Hose Connections
- 5/8″
A serviceable thermosiphon heater for industrial, agricultural and off-road equipment. Series 41 combines rugged construction, efficient heat transfer and replaceable components for dependable long-term use.
APPLICATIONS
- Industrial equipment
- Agricultural equipment
- Off road equipment
FEATURES
- Copper heating element
- Replaceable thermostat & element
- Cast aluminum housing
- Vertical mounting
BENEFITS
- Reliable preheating
- Easy field service
- Efficient heat transfer
- Impact resistance
SPECIFICATIONS
- Watts
- 750 – 2000W
- Voltage
- 120V
- Hose Connections
- 5/8″
Works in non-corrugated lower radiator hoses for light industrial and agriculture applications. Available in 5 different hose sizes with thermostat protection.
NOTE: NOT recommended for automotive or light truck applications.
APPLICATIONS
- Light Industrial
- Medium Duty
- Agriculture
FEATURES
- Installs in minutes
- Thermostatically protected
- Replaceable cordset
- Available in 5 hose sizes
INSTALLATION
- Hose must have 15° rise
- Must be installed in smooth, molded hose
- Must have direct access to water jacket
SPECIFICATIONS
- Watts
- 375W or 600W
- Voltage
- 120V
- Fits hose size (ID)
- 1", 1-1/4", 1-1/2", 1-3/4", 2"
- Certifications
- CSA
Find the Right Engine Heating Solution for Your Application
Let our experienced team help you find a heating solution tailored to your equipment, operating conditions, and performance goals.
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