First 3D Printer (MK4) in High Humidity - General discussion, announcements and releases

RE: First 3D Printer (MK4) in High Humidity

JoanTabb — Fri, 06 Mar 2026 19:28:00 +0000

mobile phone corrupting answers....

RE: First 3D Printer (MK4) in High Humidity

JoanTabb — Fri, 06 Mar 2026 19:26:21 +0000

I had mmu3 on the mk3, a d i had 5 rolls of filament on a broom handle supported by two shel ing units... no special humidity control...

Regards Joan

RE: First 3D Printer (MK4) in High Humidity

blackhole13 — Fri, 06 Mar 2026 18:40:13 +0000

Thank you for your reply!
"Running a printer in the UK in a garden shed" this statement kind of gives me hope that i will make it somehow.
I guess UK humidity in that shed was crazy high.
Did you use a drybox with dessicant in it to feed fillament to the printer via PTFE tube, or something simmilar ?

Thank you for your time.

RE: First 3D Printer (MK4) in High Humidity

JoanTabb — Fri, 06 Mar 2026 18:21:50 +0000

I have run my mk3s in a garden shed in winter in the UK,

Biggest issue was Mintemp warnings due to low temperature

A hair dryer could be used to warm the heatbed and nozzle. Before stařting a print. .

I only used pla and petg.

Humidity was ok

First 3D Printer (MK4) in High Humidity

blackhole13 — Fri, 06 Mar 2026 17:12:49 +0000

Hi everyone,

I just got my first 3D printer, a Prusa MK4 3D Printer, and I’m planning to use it in a room that’s usually around 80% humidity, and (5 - 10 celsius ). My main concern is the electronics—especially the XBuddy board and the PSU—and the risk of condensation causing shorts or corrosion. Unfortunately, I don’t have the option to move the printer to a drier room.

For filament, I’ll be using a dry box with desiccant that feeds directly into the printer via a PTFE tube, so I think that side is covered.

To protect the printer, I’m planning to build a DIY MDF enclosure out of an old wardrobe. I’m on a tight budget, so a large dehumidifier isn’t an option, but I could consider a very small one, 30–50 watts, inside the enclosure if it would actually help.

Has anyone run their MK4 in a humid environment like this?
Would silica gel packs inside the enclosure be enough, or is a tiny dehumidifier worthwhile?
Would it make sense to put silica packs inside the XBuddy board cover to reduce the chance of condensation?

(Please forgive me that i used AI to help me write this topic)