Herman Miller Aeron vs KI Altus

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

Herman Miller

Herman Miller Aeron

$1,775 – $2,840

KI Altus

$881 – $1,516

$894

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

Differences at a glance

Herman Miller AeronKI Altus

Price: $1,775 – $2,840$881 – $1,516
Seat height: 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)17–21.75 in (43.2–55.2 cm); 16.25–20.75 in (41.3–52.7 cm)
Seat depth: 16 / 17 / 18.5 in (40.6 / 43.2 / 47.0 cm)17.25–19.75 in (43.8–50.2 cm); 15.5–18 in (39.4–45.7 cm)
Load capacity: 300 / 350 / 400 lb (136 / 158.8 / 181.4 kg)supports up to 400 pounds
Arms: Arm 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)Adjustable arms, fixed arms, or armless
Headrest: None offered by Herman MillerHeadrest available (Mesh Task / Fabric Task Headrest Adjustable Armchair)
Lumbar support: Options: No additional support, PostureFit, Adjustable Lumbar Support, Adjustable PostureFit SLMesh chair: optional adjustable lumbar (height and depth); fabric chair: automatic lumbar support
Warranty: 12-year, 3-shift warranty, with limited exceptionsLifetime

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

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

Which has a headrest?

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

What do owners mention most?

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