Central Boiler's Classic Edge outdoor wood furnaces are designed with a larger firebox for longer burn times and easier use.

Unfortunately, firebox volume is not something everybody compares when looking at outdoor furnaces. Typically companies manufacture a ‘small, medium, and large," but without actual specifications and measurements, what does that mean? It’s really quite simple… Small, Medium, and Large are not created equal.

When you compare actual firebox volume measurements, such as our large versus their large… typically what you’ll find is, when you do true measurements, you’ll see that their large actually is the size of our medium. Look past the small, medium, and large labels and compare the actual firebox volume. You’ll find the Central Boiler is the best value.

So… what’s the big deal with firebox volume? A firebox is basically the fuel tank for your furnace. Take this car for example. Suppose this car has a very small fuel tank. Even if it has good gas mileage and great horsepower, a properly sized fuel tank is just as important. Who cares if you’re getting good gas mileage if you’re constantly refilling your tank. It’s the same with furnace firebox volume. A smaller firebox will need to be filled more often. When people don’t consider actual firebox volume measurements, they can end up with the wrong size furnace.

Here is an example of two homes with identical heat loads. They are heated by wood furnaces with similar BTU output and efficiency ratings so both furnaces take the same amount of wood in a 12 period. This home is heated with a furnace that has a smaller firebox. Even though it heats the home, the small firebox needs to be filled more often. This home uses a properly sized Classic Edge. He can easily load enough wood for a 12 hour period or even longer if necessary. In general, it’s best for the furnace if the operator sticks to a 12 hour burn time, but occasionally if you want to go away for the weekend; it’s nice to know you have a furnace that will accommodate.

There’s nothing worse than the dreaded middle-of-the-night fill up. Having a Classic Edge gives peace of mind that even if the temperature drops, you’ll still have enough wood for a long burn time. Don’t be misled by labels. The Classic Edge has the perfect balance of BTU Output, efficiency, and firebox volume. Sleep tight; All Night.

For more information, please see your Owner's Manual or contact your local Central Boiler dealer.

Compliments of Central Boiler