A question we are often asked is "Do I need to run antifreeze in my outdoor wood boiler?" The answer is simple: Do you want to run antifreeze in your outdoor wood boiler? Although there are some situations in which we recommend running antifreeze, as a general rule it is more economical to just use water and keep your pump running. A few scenarios where antifreeze is a good option include vacation homes, cabins, or persons who like to let their system default to a backup heat source, rather than their outdoor wood furnace, while they're away on a trip.
This brings us to the question of what kind of antifreeze to run. We recommend using propylene glycol antifreeze because it's non-toxic, and non-corrosive. Do not run RV antifreeze in an outdoor wood boiler!
Finally comes the question how much antifreeze do I need to add to keep my unit safe from the elements? To fully protect your system, you should add at least 1 part antifreeze to 1 part water. Feel free to contact us with any additional questions.