Frequently Asked Questions
What is the difference between a brush motor and a brushless motor in a robot vacuum?
A brush motor uses carbon brushes that wear down over time, gradually losing power, while a brushless motor has no brushes so it maintains full suction power for many more years without wearing out.
Which type of motor lasts longer?
A brushless motor lasts longer — it keeps full suction power for many more years, whereas a brush motor typically loses power after a year or two and may need replacement after 18 months.
Is a brushless motor worth the extra money for a larger home with pets?
Yes, if you have a larger home with pets that shed constantly, a brushless motor is worth the extra investment because it will still work brilliantly after 4-5 years.
Are brush motors cheaper to buy upfront?
Yes, brush motors are cheaper to manufacture, so budget robot vacuums use them — you pay less initially, but they may need replacing sooner.
Do brushless motor vacuums lose suction over time?
No, with a brushless motor you keep full suction power for many more years because there’s nothing rubbing away and wearing out inside the motor.
The bottom line
Here’s the honest truth: brushless motors are the better long-term investment, but they’re not essential for everyone. If you’re buying your first robot vacuum and you’re going to use it daily in a busy household, the extra cost of brushless pays for itself in avoided repairs and longer life. But if you’re testing the waters with a smaller space and don’t mind upgrading in a few years, a brush motor vacuum is perfectly respectable — just know that maintenance will be part of your routine. Choose brushless if longevity matters to you; choose brush if you’re budget-conscious and okay with replacing your vacuum sooner.