When it comes to buying a water cooler dispenser, several factors should influence your decision. First and foremost, consider your space - ensure the dispenser fits comfortably in your home or office. Secondly, think about the capacity you need. For a busy office, a high-capacity dispenser might be necessary. Check the filtration system - opt for one that removes impurities effectively. Energy efficiency is vital, as it impacts both the environment and your utility bills. Lastly, assess the maintenance requirements and costs associated with the dispenser. By weighing these factors, you can make an informed choice and ensure you're investing in a dispenser that meets all your hydration needs.