Chemex Classic Series 8-Cup CM-8A

Chemex Classic Series 8-Cup CM-8A

By Chemex · Coffee Makers · Kitchen & Cooking

  • Capacity: 40 oz
  • Height: 9 in
  • Diameter: 5.25 in
  • Item: CM-8A
  • Material: borosilicate glass with wood collar

Lowest price seen
~$51.50 (approx.)
from $51.50 at Amazon

Prices are snapshots. Check the current price with the store.

Summary

The Chemex Classic Series 8-Cup (CM-8A) is a manual pour-over coffeemaker: a borosilicate glass hourglass vessel with a polished wood collar and rawhide tie, with no pump, heater or electronics. The one thing to check before you buy: Wirecutter found batches above 25 oz “slow, finicky, and prone to producing less-enjoyable cups,” even with the Eight Cup model.

Strengths

  • Owners consistently praise the clean, sediment-free cup the bonded filter produces.
  • No pump, heater or wiring means there is almost nothing mechanical to fail.
  • Wirecutter noted the Chemex filter is forgiving of grind-size irregularities.
  • The borosilicate glass earns high marks from owners for durability.
  • The wood collar and hourglass shape are the iconic design most people picture as “Chemex.”
  • The glass goes in the dishwasher once the collar and tie come off.

Weaknesses

  • Wirecutter called batches over 25 oz “slow, finicky, and prone to producing less-enjoyable cups,” true even with the Eight Cup model.
  • Filters are not included, and official pre-folded ones run $11.00 a box — a permanent add-on to every brew.
  • The wood collar can swell or stain with moisture and may need occasional oiling.
  • The pour has a learning curve: grind size, water temperature and pour rate all change the cup.
  • The glass survives daily use but can break if dropped or hit with thermal shock.
  • The “8 cup” label means 5-oz cups, not standard 8-oz mugs.

Verified specifications

ModelChemex Classic Series Eight Cup, item CM-8A.
Capacity40 oz, counted as 8 × 5-oz cups.
Dimensions9 in tall, 5 1/4 in diameter.
Materiallab-grade borosilicate glass; polished wood collar with a rawhide tie.
Operationmanual pour-over; you boil water separately and pour it over the grounds.
Filtersproprietary CHEMEX Bonded FP-1, FC-100, FS-100 and FSU-100, sold separately.
Cleaningthe glass is dishwasher safe once the collar and tie are removed.
Originthe official site says Massachusetts, USA; one retailer lists the glass as made in Germany, the collar and tie in the USA.
Purchase limitthe official store caps online orders at 6 coffeemakers.
Full research notes and sources

Brewing a full batch

Wirecutter is the only established outlet found that explicitly tested the Eight Cup model, and its verdict lands on this size’s core use case. In a pour-over guide updated 2025-11-07, it names the Six Cup Classic Series as its pick for larger brews and states that brewing above 25 oz gets “slow, finicky, and prone to producing less-enjoyable cups” — “true even when we used the upsized Eight Cup model.” Its method was a 1:17 coffee-to-water ratio at 206 °F with head-to-head tasting by professional baristas.

The same testing credited the Chemex filter with a clean cup, because it strips oils, and with tolerating uneven grinds. Nobody has published an instrumented lab test of the exact CM-8A, so treat clarity as a well-supported owner and reviewer consensus rather than a measured number. If you regularly brew a full 40 oz, the Six Cup is the size Wirecutter’s data favors; if you brew smaller amounts in the Eight Cup vessel, the limitation matters less.

Filters and running costs

The CM-8A ships without filters, and only CHEMEX Bonded filters fit it: FP-1, FC-100, FS-100 or FSU-100 depending on the format. Official pre-folded filters cost $11.00 a box at the CHEMEX store (2026). That is the one recurring cost of ownership — there are no descaling tablets, pumps or heating elements to replace.

Care and the wood collar

There is no pump, heater or electronics to fail, so upkeep is simple: rinse the glass after use, keep the wood collar dry, and oil it occasionally. Owners report the collar swelling or staining when it stays wet — remove it before dishwashing, since only the glass goes in.

The glass is durable borosilicate, but it is still glass: it can break if dropped or subjected to thermal shock, and nobody has published breakage data. Care means wiping the collar, not soaking it.

Is it worth it?

The official CHEMEX US store lists the CM-8A at $51.50. At that price you are buying the manual ritual and the design as much as the hardware — the value case is brewing clarity, not automation. Wirecutter’s slow, finicky finding above 25 oz is the number to weigh: full-batch brewers should look at the Six Cup instead, while anyone brewing smaller amounts still gets the clean, sediment-free cup owners consistently praise.

Which model this is

This page covers the Eight Cup of the Classic Series line, item CM-8A — the 40 oz size between the 30 oz CM-6A and the 50 oz CM-10A, with the 15 oz CM-1C at the small end. Do not confuse it with the Glass Handle series (CM-8GH) or the Handblown series, which look similar but are different products. The US Amazon listing for this model is ASIN B000I1WP7W.

Sources

Manufacturer:

Independent reviews:

Retailers:

Owner reports:

  • None captured with direct links; owner praise and complaints above come from Reddit and forum discussions.

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