Draw around your vents. Watch the bubbles reveal hidden leaks. Save money.
DraftMap pencils physically balloon up when exposed to temperature changes. Sketch around AC vents, windows, and ducts — the marks expand into 3D bubbles proportional to the temperature difference, instantly revealing air leaks and hot/cold spots.
You draw a circle around your bedroom AC vent with what looks like a regular pencil. Turn on the cooling, and watch the graphite physically rise into 3D bubbles — bigger bubbles along the edges reveal a leak wasting 40% of the cooled air. The app shows this $5 fix will save $180/year.