Keeping round duct together (HVAC)

[Brian Elfert]

I had a forced air HVAC system installed in my house after I bought it. The round duct is all screwed at the joints and a brush on sealant was used to seal the joints. (The house had electric baseboard heat when I bought it and the electric bill was extremely high.)

[Bill George]

I had a forced air HVAC system installed in my house after I bought it. The round duct is all screwed at the joints and a brush on sealant was used to seal the joints. (The house had electric baseboard heat when I bought it and the electric bill was extremely high.)

Three screws at each joint and duct seal brush on also. I forget the real name we called it Hard Cast sealant.

[Tom Bender]

Snap lock duct should be fine if it is not put under full suction. Screws and rivets may catch tangly stuff and can be a real pain if the duct needs to be cleaned. Tape around the joints should hold fine. The seams are pretty tight but tape wouldn't hurt.

[Jim Becker]

Snap lock duct should be fine if it is not put under full suction. Screws and rivets may catch tangly stuff and can be a real pain if the duct needs to be cleaned. Tape around the joints should hold fine. The seams are pretty tight but tape wouldn't hurt.

This is HVAC, not DC. Low positive pressure.