Better than a heat sink, and allowing unlimited add-on cards, the Smart Fan will keep your Raspberry Pi running when things get hot.
Raspberry Pi 5 PWM Cooling Fan - RobotShop
Pi 5 & Arduino Friday Double-Header! - News - SparkFun Electronics
Finally completed my multi zone central AC, controlled by HA : r/homeassistant
Raspberry Pi 5 Silver ABS Case with PWM Cooling Fan - RobotShop
FEATURESSmart Fan HAT the Best Cooling Solution for Raspberry Pi40x40x10mm fan with 6 CFM airflowStep-up 12V power supply for precise fan speed
Smart Fan HAT the Best Cooling Solution for Raspberry Pi
Raspberry Pi Annual
Low-Profile CPU Cooling Fan for Raspberry Pi 4B/3B+/3B, with Aluminum Alloy Bracket
Smart Fan HAT The Best Cooling Solution for Raspberry Pi : Electronics
Smart Fan: Ideal cooling solution for Raspberry Pi by Sequent Microsystems — Kickstarter
This Raspberry Pi Smart Fan HAT is Stackable and GPIO Friendly
FEATURESSmart Fan HAT the Best Cooling Solution for Raspberry Pi40x40x10mm fan with 6 CFM airflowStep-up 12V power supply for precise fan speed
Smart Fan HAT the Best Cooling Solution for Raspberry Pi
Victron's Venus OS on a Raspberry Pi, install and configuration - Panbo
Raspberry Pi 5 PWM Cooling Fan - RobotShop
Raspberry Pi 5 PWM Cooling Fan With 40*40*10MM Larger Size