KI Altus vs Herman Miller Aeron

Side by side from official specifications, sourced prices and User Insights. No written comparison exists for this pair yet.

KI Altus

$881 – $1,516

Herman Miller

Herman Miller Aeron

$1,775 – $2,840

$894

lower starting price for KI Altus than Herman Miller Aeron at the brand stores

Differences at a glance

KI AltusHerman Miller Aeron

Price: $881 – $1,516$1,775 – $2,840
Seat height: 17–21.75 in (43.2–55.2 cm); 16.25–20.75 in (41.3–52.7 cm)14.4–19.3 in (36.6–49 cm); 14.8–22.8 in (37.6–57.9 cm); 15.8–22.8 in (40.1–57.9 cm)
Seat depth: 17.25–19.75 in (43.8–50.2 cm); 15.5–18 in (39.4–45.7 cm)16 / 17 / 18.5 in (40.6 / 43.2 / 47.0 cm)
Load capacity: supports up to 400 pounds300 / 350 / 400 lb (136 / 158.8 / 181.4 kg)
Arms: Adjustable arms, fixed arms, or armlessArm height 7.5–11.5 in (adjustable arms); 8.5 in (fixed arms); Options: Fully Adjustable Arms, Height-Adjustable Arms with Pivot, Height-Adjustable Arms, No Arms, Stationary Arms; Arm Height 7.5–11.5 in (Fully Adjustable Arms, specs page)
Headrest: Headrest available (Mesh Task / Fabric Task Headrest Adjustable Armchair)None offered by Herman Miller
Lumbar support: Mesh chair: optional adjustable lumbar (height and depth); fabric chair: automatic lumbar supportOptions: No additional support, PostureFit, Adjustable Lumbar Support, Adjustable PostureFit SL
Warranty: Lifetime12-year, 3-shift warranty, with limited exceptions

Which is cheaper, the KI Altus or the Herman Miller Aeron?

The KI Altus is cheaper to start: $881 versus $1,775 for the Herman Miller Aeron at the brand stores (Sep 2026).

Which has a headrest?

Only the KI Altus (as standard); the Herman Miller Aeron does not offer one.

What do owners mention most?

Back support for the KI Altus, and price and value for the Herman Miller Aeron, based on review summaries.