[michaelt]

Unfortunately many plastics, and the most common types of solder, start softening before you get to 180C. You can get smoke extraction fans and chimney flue fans that will tolerate higher temperatures, but they're generally an all-metal affair costing more than $33.

Assuming the 180C is at your system's ventilation output, could you move your fan to the air inlet so it only has do deal with ambient temperature air? That's what's done for blacksmith's forges etc

[owenversteeg]

Yes, chimney flue fans were next on my list but surprisingly enough the airflow for most of the shelf models is quite low. Unsurprisingly with all metal parts and less competition in the sector the performance is also far worse in terms of watts/CFM. Pushing ambient air sadly doesn’t work for my application. That said those would have all been great suggestions though so thanks!

[c_o_n_v_e_x]

Using furnace vernacular, you have forced draft fans which blow air into the furnace or induced draft fans that sucks out the hot flue gas. These fans are typically centrifugal as they develop higher pressure than an axial fan. You need the pressure to overcome the system flow impedance.