How to Master Multi-Load Fires Without Overheating
One of the most common questions masonry heater owners ask after their first heating season is this: when do I fire again, and how much wood should I use? The answer isn't as simple as "whenever it gets cold" or "as much as fits in the firebox." Multi-load firing — running two or more fires per day — is something most owners will do regularly during the coldest months. Done correctly, it keeps your home consistently warm and your heater performing at its best. Done incorrectly, it can overheat your living space, waste wood, and put unnecessary stress on your heater's masonry. This guide covers everything you need to know about multi-load firing: when to do it, how to time it, how much wood to use each time, and how to read your heater's signals so you never cross the line from comfortable warmth into uncomfortable heat. Understanding How a Masonry Heater Manages Heat Before getting into multi-load strategy, it helps to understand the fundamental mechanis...