Blog Archives

What is a Muffle Furnace?

While the term “Muffle Furnace” or “Retort Furnace” is still in use today, it doesn’t really mean the same thing as it did in the early 20th century when wood and coal were the primary ways to heat a furnace. A Muffle Furnace’s primary attribute is that it has separate combustion and heating chambers. The “Retort” is a gas sealed chamberRead more ›

Welcome to CM Furnaces

Congratulations, you’ve landed at the CM furnaces blog. We hope it will be the first of many visits as we attempt to present our thoughts on furnaces, kilns, heating, cooling, manufacturing, made in the USA, and any other hot topics that strike our fancy…. But first, a little about us.  Since 1946 CM Furnaces has been breathing fire into hundredsRead more ›