Looking to switch your gas heater from natural gas to propane (LP)? This guide highlights five reliable NG-to-LP conversion kits that fit common heater models and grills. Each option is evaluated for who it’s best for, what it includes, and any limitations to watch. Perfect for homeowners upgrading home garage heaters, outdoor heaters, and grill owners needing flexible fuel options.
Product Summary
- Ng to Lp Gas Conversion Kit for Modine Hot Dawg 30k-75k Spark Ign — Best for modular garage unit heaters from Modine, frequent DIY installers.
- Mr. Heater F260163 Big Maxx Fuel Conversion Kit — Best for Mr. Heater Big Maxx and similar units, high BTU compatibility.
- GRLP4 LP Gas Conversion Kit for Frigidaire — Best for ranges and cooktops in residential kitchens, durable brass orifices.
- F260163 Fuel Conversion Kit Parts for Mr. Heater Big Maxx — Best as a complete kit alternative for 50K/80K BTU Big Maxx series.
- Propane to Natural Gas Conversion Kit for Weber Grill — Best for Weber Genesis and Spirit grills, backyard versatility.
Ng to Lp Gas Conversion Kit for Modine Hot Dawg 30k-75k Spark Ign
Designed for NG-to-LP operations on gas-fired unit heaters, this kit covers 30,000 to 75,000 BTU units. It is a practical choice for homeowners with Modine Hot Dawg systems who want to switch to propane for convenience or fuel availability. Best for DIYers who need a straightforward swap with standard equipment compatibility. A potential limitation is that the kit’s stated range must align precisely with your heater’s BTU rating to ensure safe operation.
Mr. Heater F260163 Big Maxx Fuel Conversion Kit, NG to LP
Best for Mr. Heater Big Maxx and similar heater models, this kit allows a quick switch from natural gas to propane. It’s compatible with a broad range of BTU models (MHU50, MHU80, MH125U, HSU50, HSU80, HS125U) and includes complete conversion instructions. This option is advantageous for users seeking a unified kit with clear guidance. A caution is that compatibility hinges on the specific heater model and configuration; verify that your unit’s BTU rating and model align with the kit’s scope before purchase.
GRLP4 LP Gas Conversion Kit for Frigidaire
This 12-piece LP conversion kit targets natural-to-propane conversion for ranges, stoves, and cooktops, with precision-machined brass orifices for smooth propane flow. It’s suitable for many Frigidaire, Kenmore, and Electrolux gas appliances with GRLP4-type configurations. Choose this if you need a durable, OEM-replacement-style kit for kitchen fixtures. Limitation: primarily kitchen appliance oriented; may not fit all non-kitchen heater systems, so confirm appliance prefixes and compatibility first.
F260163 Fuel Conversion Kit Parts Compatible with Mr. Heater Big Maxx Heater
Best for Big Maxx series units requiring a complete NG-to-LP conversion. This kit targets 50K and 80K BTU Big Maxx heaters (MHU50, HSU50, MHU80, HSU80) and provides all necessary components, hardware, and rating stickers for a complete, code-compliant transition. It’s a solid all-in-one option for ensuring a proper fuel system swap. Caution: verify that your model exactly matches the Big Maxx line to avoid missing parts.
Propane to Natural Gas Conversion Kit for Weber Grill
This kit converts Weber Genesis, Spirit, and Summit grills from propane to natural gas. It includes a 10-foot natural gas hose, regulator, six sizes of brass orifices, quick connect, tools, Teflon tape, and an instruction manual. Best for backyard enthusiasts who want a continuous gas supply without frequent tank changes. Limitation: conversion suitability depends on grill model family; confirm compatibility with your exact Weber Genesis or Summit model before purchasing.
Buying Guide
Key considerations when choosing a gas conversion kit:
- Compatibility: Verify the exact heater or grill model, BTU rating, and prefix or series to ensure the kit matches the unit. Mismatched kits can lead to unsafe operation.
- BTU Range: Ensure the kit supports the heater’s BTU output. Some kits target specific ranges (e.g., 30k–75k BTU or 50k–80k BTU).
- Included Components: Look for complete kits that include regulators, orifices, hoses, hardware, and labels. A “complete conversion” kit reduces additional part hunting.
- Safety and Code Compliance: Choose kits marketed with safety in mind and those that provide correct labeling and installation guidance to support code compliance.
- Application Type: Separate kits exist for home heating units and kitchen appliances. Use the kit intended for the specific appliance category to avoid performance issues.
- Installation Ease: Consider whether the kit provides straightforward instructions and clear steps for a user with basic mechanical skills.
FAQ
- What do NG-to-LP conversion kits do?
They allow switching fuel source from natural gas to propane by replacing orifices and related components to accommodate propane’s flow and pressure characteristics. - Are these kits universal for all gas heaters?
No. Kits are model-specific. Always check compatibility with your exact unit’s make, model, and BTU rating. - Is professional installation required?
It’s recommended for safety, but some kits provide clear, step-by-step instructions for DIY installation if you have gas-safety knowledge. - Will converting affect heat output?
Conversion aims to maintain safety and proper flame characteristics; incorrect installation can alter heat output or cause unsafe operation. - Can I convert a grill from LP to NG?
Yes, but use a kit specifically designed for grill conversions in the opposite direction and ensure hose and regulator compatibility. - What’s the biggest risk when DIY converting?
The risk is gas leaks or improper flame regulation. Always test for leaks and follow local codes after installation.