Progression in the research on thermoregulation has found that warmer ambient environments impact peoples social proximity and promotes interpersonal warmth. This study aims to further explore if positive associations linked to heat can be paired with interpersonal therapy and therein enhance the effectiveness of the therapy on unipolar depressed patients’ degree of sociability. I propose an experiment where unipolar depressed patients undergo prolonged “heat therapy” (6 sessions spanned over 6 weeks), which is interpersonal therapy conducted in a temperature controlled environment of 25°c. A pre and posttest questionnaire will be administered to measure patient’s progress in interpersonal attitudes and willingness to socially integrate. The expected result of this research is that conducting interpersonal therapy in warmer ambient environments will increase people’s receptiveness to interpersonal therapy and therein stimulate greater progression in their degree of sociability. I suggest that it is due to positive associations to heat, derived from past experiences of peer induced thermoregulation, that elicit patients’ increased willingness to engage in social bonding. **HIJ abstract is very clear. Well done**