Thermal comfort without the noise: understanding and managing the sound level of central heat pumps
At AirGreen, we understand how much the sound level of an HVAC system can impact daily comfort in a home or commercial building. A high-performance central heat pump is great. A quiet central heat pump is even better. In this article, we take a deep dive into the different sources of noise related to central heat pumps, the key criteria for selecting a quiet model, mistakes to avoid during installation, and the brands and models we frequently recommend to our clients in Montréal, Laval, Longueuil, on the North Shore, and the South Shore.
Why do some central heat pumps make more noise than others?
Central heat pump noise can come from several components: the compressor, the fan, vibrations carried through the ductwork, or even a poor installation. Several factors affect this sound level:
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Compressor quality: Modern variable-speed models, like those from Bosch or Lennox, are much quieter than older single-speed compressors.
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Soundproofing of the outdoor unit casing: Some manufacturers invest in sound-absorbing materials around the motor to reduce noise pollution.
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Installation quality: A poorly executed HVAC installation, with rigid mounts or bad outdoor unit placement, can amplify vibrations.
At AirGreen, we pay close attention to each of these details to ensure installations that are as quiet as they are efficient.
How is the noise from a heat pump measured?
Sound levels are measured in decibels (dB). Here’s a frame of reference:
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30 dB: a whisper
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40 dB: a quiet library
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50–60 dB: a normal conversation
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70 dB: heavy traffic
The best central heat pumps on the market emit between 55 and 65 dB while heating or cooling, which is acceptable for residential environments. However, the installation setting matters: a 60 dB noise level may go unnoticed in a city but feel intrusive in a quiet suburban area.
Our recommended models for quiet performance
AirGreen installs only models known for their energy efficiency and quiet operation. Here are a few examples:
Bosch BOVA 2.0 IDS Premium Series Central Heat Pump – R-454B
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Sound level: 56 dB
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Variable-speed Inverter compressor
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Excellent for single-family homes in Montréal and Longueuil
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Eligible for Hydro-Québec's LogisVert rebates
Lennox SL25XPV Central Heat Pump
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Sound level: as low as 59 dB
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Ultra-quiet compressor with Quantum Coil technology
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Frequently installed in Laval and on the North Shore
Gree Flexx Central Heat Pump
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Average sound level: 58 dB
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Compact, perfect for semi-detached homes or properties with limited outdoor space
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Ideal for urban homes in areas like Rosemont or Verdun
Case Study: Bosch IDS installation in Sainte-Thérèse
A retired couple in Sainte-Thérèse, on the North Shore, contacted us to replace their noisy old heat pump. Since the outdoor unit was near their back deck, the noise had become a constant issue. We installed a Bosch BOVA IDS Premium 36,000 BTU with a variable-speed Inverter compressor. Thanks to a rubber anti-vibration base, sufficient clearance from walls, and smart unit orientation, the perceived noise level dropped by half. The result: optimal thermal comfort… in peace and quiet.
Mistakes to avoid if you're looking for a quiet central heat pump
1. Overlooking the importance of installation
A quiet model poorly installed can produce just as much noise as a low-end model. At AirGreen, our certified technicians ensure precise alignment, anti-vibration mounts, and a setup that meets acoustic standards.
2. Choosing an oversized unit
A heat pump that’s too powerful will cycle on and off frequently, generating more noise than necessary. Our experts perform a precise heat load calculation to recommend the correct BTU output for each property.
3. Ignoring peripheral components
Grilles, ducts, vents, and even air handlers must be carefully selected. We use insulated ducts and quiet units such as the Goodman R-32 air handlers to further reduce indoor noise.
Practical tips for limiting noise pollution
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Install the outdoor unit on an anti-vibration base
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Maintain at least 18 inches of clearance from walls
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Avoid pointing the unit toward sleeping or relaxing areas (bedrooms, patios)
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Opt for variable-speed units
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Plan regular HVAC maintenance to prevent abnormal noises from wear or buildup
The AirGreen approach: comfort, performance… and sound discretion
As specialists in central heat pump installation in Montréal, Laval, Longueuil, the North Shore, and the South Shore, we know how important both thermal AND acoustic comfort are. Our teams select and install tailored HVAC systems adapted to each home or building. We prioritize trusted brands, ensure meticulous installation, and provide thorough maintenance follow-up to preserve the silence… year after year.
Whether you're looking for a solution for a new home in Boucherville, a renovation in Ahuntsic, or replacing an old unit in Blainville, our team is ready to help you find the quietest central heat pump model, perfectly suited to your needs.