Top to Bottom: Logico 24 port PatchPanel
HP ProCurve 1800 24G Switch
Fortigate 100D Firewall
HP EliteDesk Mini: ESXi 7.0 / Server 2019 DC DHCP Print
QNAP NAS: 12TB PLEX Server
Black Box Surge Protector
Rack: NavePoint 9U https://smile.amazon.com/gp/product/B01A6JPLYE/ref=ppx_yo_dt_b_asin_title_o03_s00?ie=UTF8&psc=1
It's actually hasn't been an issue at all. I put the udm pro the box below, leave the fans on, and I have never seen the temp go above 40C and I leave the door closed all the time.
This is the rack I’m running at home. Fits the udmp without any issues.
You may aswell just get a proper cabinet, they are becoming so much cheaper https://www.amazon.com/NavePoint-Network-Server-Cabinet-Locking/dp/B01A6JPLYE/ref=s9_simh_gw_g23_i2_r?_encoding=UTF8&fpl=fresh&pf_rd_m=ATVPDKIKX0DER&pf_rd_s=&pf_rd_r=E4ZK6GTGRNAX4B638J12&pf_rd_t=36701&pf_rd_p=a6aaf593-1ba4-...
Oops forgot to mention that. It's a Navpoint 9U https://smile.amazon.com/gp/product/B01A6JPLYE/ref=ppx_yo_dt_b_asin_title_o03_s00?ie=UTF8&psc=1
Stand is just an Ikea Lack Rack