Heated cooling fan

I have yet to experiment with this idea myself, but using a heated fans possible along with enclosure to try and eliminate the heated bed. My thinking is that cooling should get temperatures rapidly below the glass transition or may right into, but farther cooling may hurts layer adhesive. Being able to quickly cool to a more ideal temperature would mean the nozzle temp would not need to be as high to adhere two layers adequately. It's also clear that under cooling is also a problem particularly on small thin parts.

Has anyone used anything like this before?

Heating a fan sounds more difficult than building a heated bed.

I will not say your wrong. It's definitely an issue of power and to do it with any finesse it would be more difficult the strapping heat gun or hair dry with a SS relay. The issue is that with some designs a heated bed is not reasonable. For a heated bed the wattage used is increased by the square of area, roughly speaking. That build areas with heated bed in significant. This is where heated air could help.

The complexity and power may not scale like a heated bed. The would start at a higher starting difficulty to create and implement into a design but it would not scale the same perhaps hardly at all.

My current plan is to have a daughter board. It would need an air_intake_tempurature thermistor, an air_outake_temperature thermistor, and the heating coil thermistor. The fan would have a PWM 100%. My first order of business would create a basic design and see if I can define an approximate model that predicts Delta Temperature for a given heating coil temp, intake temp and PWM(possibly converted to cfm). I have an idea by using dimensional analysis, but I suspect the real world will be a bit different.