![HVAC Plenum Ceiling Box 16x 16 X 16 (16"X16" Square to 16" Round) with Drywall Flange - Connects to Vent Register Diffuser, Galvanized Steel Metal C-Box Duct, Airflow Conditioning Ceiling Registers - HVAC Plenum Ceiling Box 16x 16 X 16 (16"X16" Square to 16" Round) with Drywall Flange - Connects to Vent Register Diffuser, Galvanized Steel Metal C-Box Duct, Airflow Conditioning Ceiling Registers -](https://m.media-amazon.com/images/I/51h-+AIptuL._AC_SL1500_.jpg)
HVAC Plenum Ceiling Box 16x 16 X 16 (16"X16" Square to 16" Round) with Drywall Flange - Connects to Vent Register Diffuser, Galvanized Steel Metal C-Box Duct, Airflow Conditioning Ceiling Registers -
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Plenum Box_Products_Ningbo Fanshun Air-Conditioner Equipment Co.,Ltd.|Yuyao Fanshun Import&Export Co.,Ltd|H.JIAN TEC CO.,LIMITED
![a) Diffuser face, b) diffuser with plenum box with perforated plate, c)... | Download Scientific Diagram a) Diffuser face, b) diffuser with plenum box with perforated plate, c)... | Download Scientific Diagram](https://www.researchgate.net/publication/228774100/figure/fig1/AS:300862913171475@1448742717002/a-Diffuser-face-b-diffuser-with-plenum-box-with-perforated-plate-c-diffuser-with.png)