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AssigneeTrane International Inc.
InventorsYogesh Pandit, Richard L. Jameson, Zubin Varghese, John Bailey, Lance Lindenburg, Thomas Gort, Shiva Prasad Keralapura Basavaraju, Kevin Joseph Ligi, Chris Fuller, Curtis Mitchell
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Example embodiments of the present disclosure relate to improved HVAC devices and kits for HVAC devices that improve the sound attenuation associated with the device, particularly low-frequency noise. An example embodiment includes an improved furnace including a housing with a combustion air chamber, a heat exchanger chamber, and a circulation blower chamber, wherein the combustion air chamber comprises a burner assembly and a combustion air fan, the furnace also includes a sound attenuation layer including a first acoustic metamaterial layer coupled to the combustion air chamber and tuned to attenuate sound for a first frequency band, one or more housing openings fluidly connecting the combustion air chamber to an environment outside the housing, wherein the sound attenuation layer includes a discontinuous section that aligns with one or more of the housing openings.
An improved furnace comprising:
A retrofit kit for reducing low frequency sound emanating from an HVAC device having a housing, wherein the HVAC device comprises a gas-fired furnace comprising a combustion chamber, wherein the combustion chamber comprises a burner assembly and a combustion air fan, the retrofit kit comprising:
Dependencies are inferred from the claim text.