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9. Managing Enclosure Temperatures

There's not much to a 3D printer enclosure. Although ours look fancy, functionally,

they're not much diﬀerent from putting a cardboard box over the printers since both

designs are passively heated by the beds. How complicated can they be? This

section will explain how they work and how to manage the temperatures to get quality

prints while protecting your lungs.

We generally get two types of customers:

Those interested primarily on air quality.

Those interested mostly in print quality.

Think Airﬂow, Not Fishtank

The problem is that those two goals use two diﬀerent techniques in terms of airﬂow.

We use the same design as industrial equipment for the best air quality, which uses

airﬂow to manage air quality. Because of physics, the amount of air moving into the

enclosure has to be equal to the air moving out of the enclosure. When the air moves

out of the enclosure carrying volatile organic compounds, it can be vented to the

outside or run through an air ﬁlter.

People often ask us if the enclosures are airtight and have a bottom. If your primary

concern is air quality, then being airtight doesn't buy you anything since the particles

will ﬂoat out when you open the door. By maintaining a negative air pressure, the

particles are reliably kept away from human operators, which means having openings

for air to both enter and exit the enclosure.

If the maximum internal temperature is the goal, being airtight also doesn't help since

the leading cause of heat loss is conduction through the sides of the enclosure, not

through small amounts of air loss. A bottom doesn't help either since while heat

doesn't rise, hot air does, and thus almost all of the heat of an enclosure is at the top.

However, a bottom is helpful if your table is too small for the enclosure.

Since airﬂow is critical, all of our enclosures come with fans chosen for CFM ratings to

match the cubic size of the enclosures. This ensures enough airﬂow for cool-loving

ﬁlament types like PLA to keep the temperatures in the safe zone.

Room Temperature