Compression seal groove connector

A plenum housing, comprising:

• a plurality of structural thermal barrier double-wall construction panels including a first lateral side wall, a second lateral side wall, a bottom wall, a top wall, a front wall, and a rear wall defining the plenum housing;
• a plurality of compression seal groove connectors secured between the plurality of structural thermal barrier double-wall construction panels, each of the plurality of compression seal groove connectors includes a recess having two interior opposing surfaces with at least one compression seal groove, each of the at least one compression seal grooves extends along a length of a respective compression seal groove connector and is parallel to a longitudinal axis of the respective compression seal groove connector, wherein a seal is formed between each of the plurality of structural thermal barrier double-wall construction panels and each of the two interior opposing surfaces of the respective compression seal groove connector, the seal including adhesive between the each of the plurality of structural thermal barrier double-wall construction panels and each of the two interior opposing surfaces of the respective compression seal groove connector such that the adhesive fills the at least one compression seal groove, the recess being shaped and dimensioned for encapsulating and engaging a lateral edge of each of the plurality of structural thermal barrier double-wall construction panels with the adhesive between the two interior opposing surfaces and the lateral edge of the structural thermal barrier double-wall construction panel, the plurality of compression seal groove connectors being shaped and dimensioned to hold the lateral edge of each of the plurality of structural thermal barrier double-wall construction panels in spaced relationships and at various angular orientations, wherein the plenum housing has a SMACNA duct leakage class between 0 and 3.