What Everyone Needs To Know About HVAC Systems

Getting More Efficiency from a Central Heating Unit

by Amelia Martin

A central heating unit is a great way to heat a house, but in order to get the most from your system, you need to make sure that it runs as efficiently as possible. While installing the most efficient furnace you can afford is a great place to start, there are more steps you need to take in order to make sure that your system runs as its optimum level. 


No matter how efficient your central furnace is, it still has to push hot air through a system of ducts. When your furnace turns off, the ambient temperature inside your home will cool down the ducts. This is especially true if you have ducts running outside of your home's insulation envelope. The cooled ducts will then rapidly heat up when your furnace kicks on. This cycle of heating and cooling will cause the metal the ducts are made from to expand and contract repeatedly. Over time this expansion and contraction is enough to compromise the seals between the joints in your ducts. When those seals fail, hot air will leak out of your ducts before it has a chance to reach your home. In this way, leaky ducts can reduce your heating and cooling efficiency by up to 25%. Thus, when you install a new highly efficient furnace, you should also have your ducts inspected and sealed if necessary. 

Window Film

Another way to improve furnace efficiency is by reducing the amount of air that leaks out of your home. Windows are one of the weakest parts of any home. As heat warms the inside surface of the window, the cold wind syphons that heat away as it absorbs heat from the outside of the window. While mute-pane windows can help reduce heat loss, you should also coat your windows with low-e window film. A good film will reduce your heating costs by up to 25% by reflecting heat back into your home. 

These are just a couple of steps that you could take to get more from your furnace. It only makes sense that if your home is losing heat as fast as your furnace can produce it, you won't get the efficiency that you should from your furnace. Especially if you live in an older home, you should thoroughly inspect your home to find ways to improve the performance of your furnace. A few little changes can add up to a big payoff.