Avoiding heat cams FLIR

Dude, me and my friends were just talking about this last week. What if? We figured the easiest thing would be to build a "bunker" out of compressed insulation and expanding foam. The only way is to cool the exhaust, but that's easy with a long duct, since the air will cool down on its own by the time it gets to the end. Obviously non of us tried this but that's in my opinion best way to avoid choppers 😉

Grow underground in a bunker. place a bunch of fountains above it. or some trees/shrubs. Maybe gilli mesh your house? I remember in the 90's and 00's they had choppers out in cali detecting all the heart from roof tops and said one in 3 homes was a grow op. LEDs run cooler so that should help. Can blast AC to help off set the heat but lots of money, I'd rather just grow outdoors and say fuck it.

I agree with @ATLien415 on this — it's extremely difficult, almost impossible, to completely evade FLIR unless you're willing to invest major effort, serious cash, or both. There are “methods,” but for 99% of people, they’re not worth the risk or hassle. That said, I did learn a few clever things back in the Netherlands. One trick some used was exploiting local conditions to redirect or mask heat signatures. For example, in Amsterdam, the water table is ridiculously shallow — dig just 1 or 2 meters down, and you hit groundwater. So, some growers would pipe their exhaust air through underground ducts or shafts that led into the soil or water systems. The goal was to disperse and equalize the heat so that the thermal signature never reached the surface in a suspicious way. Basically, using nature as a heat sink. Still, even that only works if your setup is clean, your ventilation is tight, and your output temps are under control. FLIR doesn’t see "grow rooms" — it sees anomalies. And that’s the whole problem. If your attic glows in winter while your neighbors' don’t, that’s all it takes. Bottom line: unless you’re running military-grade concealment or using the landscape creatively (e.g. water dumps, industrial areas, geothermal masking), FLIR will find you if someone’s actively scanning. Best advice? Blend in. Stay small. Don't give them a reason to aim the camera at your spot in the first place.

Glass is not transparent to all infrared wavelengths. While some infrared wavelengths can pass through, those used by thermal imaging cameras are largely reflected or absorbed by the glass. The airspace between the two panes of glass in double glazing adds another layer of insulation and reflection, further reducing the ability of a thermal camera to detect heat signatures through the window. IR Thermal cameras rely on detecting infrared radiation emitted or reflected by objects. However, glass reflects this radiation, meaning the camera primarily sees the reflection of the surrounding environment, not what's on the other side. In addition to the air space, low-emissivity (low-E) coatings can be applied to the glass to further reduce infrared radiation. These coatings are designed to reflect infrared light, further minimizing heat transfer. Glass is costly, though. Certain types of mirrors can allow infrared (IR) light to pass through while reflecting visible light. These are called cold mirrors. They are designed to transmit infrared wavelengths while reflecting the visible spectrum. Conversely, hot mirrors reflect infrared and transmit visible light. While most mirrors reflect most of the light that hits them, including infrared, specialized mirrors like hot and cold mirrors are designed to selectively reflect or transmit different parts of the electromagnetic spectrum.