Seal system for duct network

Apparatus for forming an airtight joint between two duct sections comprising

• a pair of frames having corner pieces co-joined by linear pieces, each of said frames secured to each duct section and having complementary outer surfaces that are brought together to join said duct sections;
• an angular corner seal positioned between said frames at each corner, said corner seal being die cut from a foam sheet and having an adhesive backing on at least one face thereof for attaching said corner seal to said outer surface of one of said frames;
• a linear seal extending between adjacent corner seals, each linear seal having a length such that it overlaps the two adjacent corner seals, said linear seals each having an adhesive backing for attaching said linear seal to the outer surface of at least one of said frames and to the overlapped sections of adjacent corner pieces, wherein said linear seal overlaps at least one-half of said leg of said corner seal;
• and
• a means for fastening said frames together in face-to-face contact with sufficient force to compress the seals between said frames to form an airtight joint therebetween.

Apparatus for forming an airtight joint between two duct sections comprising

• a pair of frames having corner pieces co-joined by linear pieces, each of said frames secured to each duct section and having complementary outer surfaces that are brought together to join said duct sections;
• an angular corner seal positioned between said frames at each corner, said corner seal being die cut from a foam sheet and having an adhesive backing on at least one face thereof for attaching said corner seal to said outer surface of one of said frames, wherein said corner seal includes a corner section and legs extending therefrom, said legs having a thickness less than the thickness of said corner section;
• a linear seal extending between adjacent corner seals, each linear seal having a length such that it overlaps the two adjacent corner seals, said linear seals each having an adhesive backing for attaching said linear seal to the outer surface of at least one of said frames and to the overlapped sections of adjacent corner pieces;
• and
• a means for fastening said frames together in face-to-face contact with sufficient force to compress the seals between said frames to form an airtight joint therebetween.