Modine 3H0372660003 Conversion Kit

When transitioning a Modine unit heater from natural gas to liquid propane, using the Modine 3H0372660003 conversion kit is the standard protocol for maintaining equipment integrity and performance. This OEM gas conversion kit is the direct engineering replacement for the legacy Modine 53081 and is specifically calibrated for 125,000 BTU models across several major product lines. Technicians frequently utilize this kit for field gas conversion on Modine Hot Dawg (HD/HDS), HDB, HDC, and PTP/PTS series heaters. The kit includes precision-machined propane orifices and a matched regulator spring to ensure the burner manifold pressure is correctly adjusted for the higher energy density of LP gas.

Proper installation of the 3H0372660003 conversion kit ensures that the combustion blower and heat exchanger operate within their design parameters, preventing carboning or soot buildup associated with incorrect fuel delivery. For contractors performing a LP conversion for Modine HD125, this kit provides the necessary replacement HVAC parts to achieve a safe, clean burn. High-quality alloy components in the kit are designed to withstand the thermal stresses of industrial and commercial heating applications, ensuring long-term reliability in the field after the natural gas to propane transition is complete.

• Direct OEM Replacement: Engineered as the official successor to part number 53081, ensuring perfect fitment without manifold modification.
• Wide Compatibility: Validated for use with Modine HD125, HDS125, HDB125, HDC125, PTP125, and PTS125 unit heaters.
• Optimized Combustion: Includes calibrated propane orifices and regulator components to maintain correct manifold pressure and thermal efficiency.
• Contractor-Grade Reliability: Constructed from high-spec materials to handle the demanding environment of overhead gas-fired heaters.

Is the 3H0372660003 compatible with older Modine 53081 units?
Yes, the 3H0372660003 is the direct technical replacement for the discontinued 53081 kit and is the recommended part for all current 125,000 BTU single-stage conversions.

Can I use this kit for a 125,000 BTU unit at high altitudes?
This kit is designed for standard elevations (typically 0–2,000 ft). For installations above 2,000 feet, you must consult the Modine high-altitude orifice charts in addition to this base conversion kit.

What models belong to the 125 series for this kit?
This natural gas to propane conversion is specific to the 125-size models in the HD, HDS, HDB, HDC, PTP, BTP, PTS, and BTS product families.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.