Temperature control device mounted to a sealed electrical wall box

A wallbox system to prevent the ingress of air from a wall cavity into a wallbox, the wallbox system comprising:

• a housing having an internal space defined by:
• a peripheral wall having a front edge and a back edge;
• a back cover coupled to the back edge of the peripheral wall, the back cover including a plurality of apertures;
• and
• a flange coupled to at least a portion of the front edge of the peripheral wall;
• a plurality of glands, each of the plurality of glands inserted into a respective one of the plurality of apertures to seal the aperture and prevent air incursion into the internal space of the housing;
• each of the plurality of glands including a sidewall, an open end, and a closed end;
• and
• each of the plurality of glands formed of a resilient material having a first thickness;
• wherein the closed end of each of the plurality of glands includes a membrane portion having a second thickness less than the first thickness centered on the closed end of the gland, the membrane portion to accommodate a penetration and a bidirectional passage of an electrical conductor while the resilient material forming the gland maintains contact with an exterior surface of the electrical conductor to form an air-tight seal therebetween.