When you’re shopping around for a new furnace, you might start to develop a new vocabulary. There’s the AFUE—Annual Fuel Utilization Efficiency—that helps you determine the efficiency of your new system. And another set of terms you may see used often are as follows: “one-stage,” “two-stage,” and “modulating” furnace.
You might notice that modulating and two-stage furnaces receive a higher rating for efficiency and performance (or simply find that the price for these units is higher). Wondering why this is? Does a two-stage or modulating furnace really make that much of a difference? Find out in today’s guide to these powerful systems.
The boiler is an incredibly reliable heating system. Many people keep their boilers for decades (although this can be unsafe, and we recommend replacing them before their 15-20 year lifespan is up). Yet, boilers can still run into their share of trouble. One of the most common issues our customers come across in a gas hydronic boiler has to do with something called scaling.
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