It Is Larger in Size. One reason that your older furnace was quieter than your new one is that pretty much everything that was part of its system was smaller. Older systems had smaller blower motors and cabinets. They also had a smaller duct system.
As a rule, all modern induced combustion furnaces are more noisy than the old natural draft furnaces. The more expensive, higher efficiency models tend to be quieter than the lower efficiency, less expensive models.
The most likely reason why your new furnace is noisier than your old furnace is because your new furnace is more efficient than your old furnace. The sound that you are hearing could simply be more airflow.
When it's time to replace look at a modulating or 2 stage furnace. This will cut down on blower noise most of the time, but when needing full capacity it will be loud. Relocating the return grille or adding a 4/5 inch media filter can provide some relief as well.
On a normal day, your home's furnace might make a little noise as it starts up, when it's turning on, and then when it turns off. You can always expect to hear some noise from the furnace. The thing about this noise is that it should never be disruptive.
Normal Furnace Noises
Sometimes there is a little bit of a pop or click as the furnace fires up, then the heating system settles into a dull hum as it runs. Think of it like the click you hear when you turn on the burner on a gas stove.
It's often said that you shouldn't be able to hear a central heating system that's running well and efficiently. Your heating should come on and off seamlessly with little to no noise.
The third way a new air conditioning system benefits you is through its quieter operation. Thanks to improvements in compressor technology and a fan-blade shape, the quietest modern models generate only 68 decibels of sound, which is about 1/20th of the noise generated by many older units.
Quieter Operation
Two-stage furnaces are quieter than single-stage furnaces due to their slower operating speeds and ECMs. Single-stage furnaces produce loud noises when they turn on and off.
7. Grinding, Scraping, or Clanking. If your furnace sounds like a train grinding and scraping away on tracks, then you probably have an issue with the blower wheel.
A high-efficiency gas furnace is typically much quieter than standard furnaces because it doesn't have to run as hard or burn as hot to heat your home. This is especially beneficial for those who need a quiet environment for sleeping or studying.
Ask twenty professional HVAC contractors the question, “How Much Does A New Furnace Cost?” and you'll probably get the same answer... “It depends.” On average, the cost of a new furnace can range from $2,000 - $14,2001. However, factors like furnace efficiency, type, size, and much more can impact this range.
What is the average life of a residential furnace? A furnace that receives regular maintenance can last at least 15 to 20 years, but completing annual maintenance and being diligent with repairs can extend the life of a furnace even longer.
Installation Entails More than Just the Furnace
For a gas-powered furnace, a contractor must set up a gas connection and vent. Installing an electric furnace requires running wiring, adding a circuit breaker, or perhaps updating an electrical panel. Holes are often drilled for pipes and wires.
Gas furnaces also require more standard maintenance, so those costs will be higher as well. Electric units are often quieter than gas models and often can last longer too.
For the most part, an HVAC system will be very quiet background noise that's easy to ignore. An HVAC system usually won't run loudly unless there's a problem. Your HVAC system, if there's a problem, may make several different noises. You may hear a buzzing noise, a popping sound, or even clanking.
For example, a smaller duct system could contribute to less air circulating through your home. This means that your new furnace is noisier because the larger size of its components allows you to receive more airflow.
If your furnace's insulation is damaged, the howling noise can be caused by air flowing through it and around other parts of your home. You'll need to replace this with a good quality insulation material that will prevent it from moving again. This may take some time, but it's the best way to quiet howling noises.
A variable-speed furnace will run at reduced speeds for most of its operational time. That's how they maintain the set temperature in your home. As a result, they run quieter than the average conventional furnace. At their lowest speeds, it isn't easy to hear most variable-speed furnaces running.
A majority of furnaces will produce a low humming noise while they are operating. If this noise is becoming noticeably loud, this is a signal of a severe problem with your blower fan or capacitor. To prevent damage to your fan, it's important to call a licensed technician to inspect and repair the blower motor.
If the sound is louder than typical and lasts longer than normal, it can be a sign of a problem with dirty burners, high gas pressure, or a malfunctioning heat exchanger, all of which could compromise the equipment's functionality and safety.
It is normal to hear a pop or click when a furnace initially starts up. That initial pop is usually followed up by a low hum or the sound of metal expansion as the different metal parts heat up. There are some normal furnace noises you can expect to hear, but there are also some noises that do cause concern.