HVAC equipment is expected to make some noise when it's operating. With your home's system, you'll probably hear the sound of the blower unit starting, running, then shutting down, and perhaps some noise as air moves through the ductwork. Outdoors, you'll hear louder noises from the compressor motor and condenser fan.
The sounds produced by an HVAC system also depend on various factors like:
- Manufacturer/brand. Equipment from reputable manufacturers is generally more solidly constructed, which can lessen the amount of noise made when it's operating.
- Equipment age. HVAC components can get louder with age, or as problems develop, plus they're not equipped with the noise-reducing features of new units.
- Size or capacity. Generally, you can expect HVAC equipment noise output to increase along with capacity.
- Installation issues. Problems related to installation quality can increase HVAC sound levels, like an off-balance compressor or blower unit rattling, or pops, pings or creaks in improperly-secured air ducts.
If your HVAC equipment is excessively noisy or has developed new or alarming sounds, have it checked by an experienced HVAC pro. It may simply need repairs, or there may be options available to lessen the sound level.
New HVAC Equipment Sound Levels
If you're shopping for quiet new HVAC equipment, be sure to check the decibel (db) ratings for different models. Look for indoor components rated around 20 db, and outdoor units from 50—60 db. There are also new systems equipped with sound-reducing features like:
- Variable-speed blowers. These units are designed to run quietly and efficiently. The fans start up on low, then ramp up and run on the slowest speed needed to maintain comfort.
- Noise-mitigating outdoor cabinets. Quiet outdoor units feature cabinet insulation, anti-vibration mounts and specialized grills that minimize airflow noise.
- Direct-drive condenser fans. Direct-drive outdoor fans are precision-balanced to help reduce noise when the unit is running.
- Discharge mufflers. These compressor mufflers smooth vibrations and pulsations in the discharge lines to reduce sound output.
If you need expert advice about the sound levels of new or existing HVAC equipment in your Fort Wayne home, contact us today at Hartman Brothers Heating & Air.
Our goal is to help educate our customers in New Haven, Indiana and surrounding Fort Wayne area about energy and home comfort issues (specific to HVAC systems). For more information about other HVAC topics, download our free Home Comfort Guide or call us at 260-376-2961.