Description
Proheat X30 Marine Diesel Coolant Heater – Heater Only – MH0300
Overview: The Proheat X30 is a fully modulating diesel-fired marine coolant heater engineered as a central thermal management system for vessels requiring dependable, professional-grade heat. Rather than blowing hot air directly, the X30 heats engine coolant, which is circulated through air handlers, heat exchangers, defrost coils, and domestic hot water tanks. This listing is for the heater unit only and is intended for integration into a complete Proheat X30 system.
- Variable heat output: Automatically modulates between 15,000 and 31,000 BTU/hr to precisely match onboard heat demand.
- Central coolant-based heating: Enables even, quiet, draft-free heat distribution throughout the vessel.
- Multi-zone capability: Supports up to four independently controlled heating zones with appropriate controllers.
- Ultra-clean combustion: Oxygen-sensing closed-loop combustion continuously adjusts fuel and air mixture.
- Extreme environment capable: Designed to operate in sub-zero temperatures and high-altitude conditions.
System Operation: The X30 heats a closed-loop coolant circuit to a controlled temperature range of 150–185°F. Heated coolant is circulated through connected fan coils, radiators, water tanks, or engine heat exchangers. This architecture allows the heater to provide cabin heat at anchor, recover waste engine heat while underway, pre-warm engines in cold climates, and deliver domestic hot water — all from a single, integrated system.
Advanced Control & Diagnostics: The X30 uses a CAN-bus enabled electronic control platform supporting analog and digital inputs. Integrated diagnostics monitor flame quality, fuel delivery, coolant temperature, voltage, and system health. Faults are logged and displayed through compatible Proheat controllers, improving reliability and simplifying troubleshooting.
Important System Note
This product is supplied as the heater unit only. A complete operating system requires additional components including installation kit, exhaust system, combustion air intake, fuel pump, coolant circulation pump, controllers, thermostats, wiring harnesses, and heat distribution hardware. These components are sold separately.
What’s In The Box
- Proheat X30 diesel coolant heater assembly
- Integrated stainless steel heat exchanger
- Vibration-isolated mounting base
- Factory-installed electronic control module
- Manufacturer documentation
Specifications
| Brand | Proheat |
| Model / Part Number | MH0300 |
| Heater Type | Diesel-fired coolant heater |
| Heat Output (Variable) | 15,000–31,000 BTU/hr (2.9–9.1 kW) |
| Heat Control | Fully modulating, demand-based output |
| Operating Voltage Range | 10–30 V DC |
| Electrical Consumption | 90 W maximum |
| Current Draw | 7.5 A @ 12 V / 3.8 A @ 24 V (max) |
| Fuel Types | Diesel #1/#2, Arctic diesel, kerosene (K-1), Jet A, Jet A-1, JP-8, biodiesel up to B20 |
| Fuel Consumption | 0.10–0.31 gal/hr (0.4–1.17 L/hr) |
| Ignition System | Electronic spark ignition |
| Combustion Control | Closed-loop oxygen-sensing system |
| Coolant Operating Temperature | 150–185°F (65–85°C) |
| Minimum Coolant Flow | 3.0 gal/min (11.4 L/min) |
| Heat Exchanger Volume | 0.36 qt (0.34 L) |
| Operating Temperature Range | –40°F to 185°F (–40°C to 85°C) |
| Maximum Operating Altitude | 15,000 ft (4,572 m) |
| Weight (Heater Only) | 36 lb (16.3 kg) |
| Dimensions (L × W × H) | 12.3 × 10.2 × 9.9 in (312 × 256 × 251 mm) |
| Certifications | Marine and transportation compliant; designed for continuous-duty operation |
| Typical Applications | Marine cabin heat, engine pre-heat, domestic hot water, windshield defrost |
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