10 Best Outdoor Wood Boilers of December 2025

• Boiler Rust Inhibitor - Treats 500 to 720 fresh water.
• Use in most outdoor wood boilers. Compatible with propylene and ethyelen glycol.
• Stops boiler corrosion.
• Compatible with Iron, SSTL, Copper, Bronze, and PEX.
• Turns the water pink for product residual and leak detection.

ChemWorld

• Contains Two levels of protection
• Formulated to Prevent Rust & Scale, Safe for Stainless & Mild Steel
• Dramatically Reduces Sludge & Mineral Deposits, Protects Copper and Brass
• 2 Gallon Pack- Each gallon treats 300 gallons of water
• Made in the USA

Alternative Heating & Supplies

• Designed for Outdoor & Indoor wood boilers with mild or stainless steel construction
• This product may also be used as a full spectrum water conditioning agent for other hydronic and solar heating applications.
• Corrosion and scale inhibitor for wood burning stoves
• Alternative Boiler Treatment 2 Quarts (each quart treats 200 gallons)
• Nitrate based instead of Nitrite

Alternative Heating & Supplies

• Protect your wood boiler from rust, corrosion, and scale!
• Each one gallon bottle treats up to 300 Gallons.
• Balances pH and Alkalinity for your Outdoor Wood Boiler
• Meets or exceeds all wood boiler manufacturer nitrite warranty requirements.
• This offer includes two (2), One Gallon Bottles of ProTech 300 Wood Boiler Rust Inhibitor Treatment

Alternative Heating & Supplies

Heatmor

• Contains Two levels of protection, Rust Inhibitor
• Formulated to Prevent Rust & Scale, Safe for Stainless & Mild Steel
• Dramatically Reduces Sludge & Mineral Deposits
• Protects Copper and Brass
• Made in the USA

Alternative Heating & Supplies

• Easy to install

Central Boiler

• Protect your wood boiler from rust, corrosion, and scale.
• Meets or exceeds all boiler manufacturer nitrite warranty requirements.
• Balance pH and Alkalinity confidently
• Each one gallon bottle treats 300 Gallons at 1500 PPM
• Works with Stainless Steel, Mild Steel and Boiler Plate

Alternative Heating & Supplies