FAQs

Can I return it if I don’t like it?

Absolutely. You have 30 days from receipt of your Ratio machine to try it out. If you decide it's not for you, we will issue you a full refund. To start the return process, visit ratiocoffee.com/return-warranty

What is your warranty policy?

We have exceptionally generous (and long) warranty periods. Read more at ratiocoffee.com/warranty

Is there a hot plate?

No. Adding heat to brewed coffee ruins the flavor within minutes. The Ratio glass carafe is thick, tempered borosilicate glass, and with the lid in place it keeps the coffee hot for about 15 minutes.

Are there any plastic parts?

FDA-grade silicone and a single BPA-free plastic component are used internally. The plastic we have incorporated into the Ratio Eight is medical grade quality. Made of polysulfone, this food-grade quality plastic is FDA certified and a NSF compliant material.

Can I run the glass carafe through the dishwasher?

We do not recommend putting the Ratio glass carafe in the dishwasher. The silicone base can peel away from the hot water and detergent. The Ratio carafe is made of tempered borosilicate glass, similar to laboratory glass. After each brew, we recommend rinsing the carafe in warm tap water, using a drop of dish soap if you’d like. You may use the Ratio Machine Wash as frequently as you’d like to remove mineral buildup and coffee stains.

Will you ship overseas and do you have a 220 volt version?

Please contact us for information about our growing network of Ratio partners in Europe and Asia.

Can I use a Chemex carafe?

The Ratio Eight uses a magnet in the carafe to detect if it is safe to deliver hot water. Other coffee makers use a mechanical button that the carafe pushes against to turn the machine on. The trouble with these mechanical buttons is they tend to wear out over time, and often get stuck in the “on” position. Using a magnet eliminates this moving part. Unfortunately, the Chemex carafe does not have this magnet, so at this time it cannot be used with the Ratio Eight. 

What filters do I use?

You have your choice of filter to the Ratio carafe. This can either be a conical paper filter (such as the Chemex paper filter) or a permanent stainless filter like the Able Kone for Ratio. The Ratio Six uses a flat bottom filter.

Where do you manufacture the Ratio Eight?

We design and build the Ratio Eight here in Portland, Oregon out of custom parts made for us in Taiwan and China. The Ratio Six is made for us in Guangdong, China. We regularly visit each of our factories in person to ensure an exceptional level of quality in every aspect of the operation.