Last night a helicopter was flying fairly close to my house and was quite noisy .I guess he wasnt there for me but is there a chance he picked up my heat signature? This is the score on my room. Ive a 400 watt light. The light had been on for about 7 hours at this time. My heat is vented out of a chimney. I have a air gap in the grow room made of plasterboard,then the wall. bricks are about 4 inches wide plus the cavity,then another brick. In total about 13 to 14 inches of outer wall. temp is unknown but was not hot,just warm inside.It was not warm outside either.quite cold for May.The days are warm so have not needed to put heating on. What you reckon? Thanks for reading.