Does anyone know if it is OK to install a new duct collar to the back wall of the HVAC "supply box"/plenum? That is, on the end of it, where the squirrel cage blower is blowing directly towards.
Or, can you only have ducts leaving the sides of it so all the blowing air hits that back wall and reflects backwards to pressurize the box?
Thanks in advance.
Or, can you only have ducts leaving the sides of it so all the blowing air hits that back wall and reflects backwards to pressurize the box?
Thanks in advance.