Heat pump water heater muffler

A heat pump water heater comprising:

• a housing comprising an air inlet and an air outlet;
• a compressor disposed within the housing;
• and
• a first muffler disposed between the compressor and either the air inlet or the air outlet, wherein the first muffler is configured to allow air to enter or exit the housing but reflect sound generated by the compressor back into the housing, and wherein the first muffler comprises a first baffle plate and a second baffle plate that are disposed parallel to one another and at least partially overlap one another.

A heat pump water heater comprising:

• a housing comprising an air inlet and an air outlet;
• a compressor disposed within the housing;
• an inlet muffler disposed between the compressor and the air inlet;
• and
• an outlet muffler disposed between the compressor and the air outlet,
• wherein the inlet muffler and the outlet muffler are configured to allow air to enter or exit the housing but reflect sound generated by the compressor back into the housing.