Putting a fan begin your router won't boost the range because photons emitted by the router's antenna won't be affected by moving air from the fan. Putting a floodlight however...
Even if they were affected by any measurable amount, the photons move so much faster than the air that it's an absolutely negligible difference incapable of being measured. It's like 1 trillion divided by 1 trillion and 1 equaling approximately 1. The outcome is unaffected by the extra 1. It's a non-factor. I'm trying to explain this for the future not-smart-people but I think I'm just making it much worse.