HBADA E3 Pro vs SIHOO Doro S100: Specs, Warranty and Price

Research note: This comparison uses each brand's published store specifications (HBADA US, UK and EU stores; SIHOO US and UK stores), not a hands-on Chairpedia test. Figures are quoted as each brand states them, with the store they come from.

Introduction

The HBADA E3 Pro (2026 Edition) and the SIHOO Doro S100 are mesh-back chairs with an adjustable seat depth, an adjustable headrest and a lumbar support each brand calls dynamic or adaptive. In one sentence: the S100 lists lower, while the E3 Pro has a longer seat, a deeper recline, more adjustable arms and lumbar, and a longer warranty on its core parts. Both list a 330 lb maximum load on their US stores, and their seat height ranges almost match, so the choice is about how much adjustment and warranty the extra money buys.

At a glance

HBADA E3 Pro — strengths and weaknesses

Documented features: HBADA's EU store gives a seat height of 46–54.5 cm (about 18.1–21.5 in) and a seat depth of 45–50 cm (about 17.7–19.7 in); the UK store gives a seat width of 51.5 cm. Four recline positions are listed: 105°, 115°, 130° and 140°. The 720° Omni-Functional armrests rotate the pad 360°, swivel the arm body 360°, move 7 cm in height and 6 cm forward and backward, and flip up 26° or down 13°. The 3-Zone Adaptive Lumbar Support has six height levels over 6 cm, 3.2 cm of forward/backward travel with an adaptive or lock mode, and side wings that rotate 40°. The 4D headrest rotates 70° on two axes, moves 4 cm in height and 7 cm forward and backward. The US store lists a 330 lbs maximum load, a recommended user height of 155–195 cm, and a warranty of 5 years on the base, gas lift and casters and 3 years on other components.

Check before buying: HBADA does not publish a chair weight for the E3 Pro. The many armrest and lumbar settings take time to set up, which matters if several people share the chair. The regular US price is $659 without the footrest and $709 with it; the store also showed a lower sale price on 2026-10-08.

SIHOO Doro S100 — strengths and weaknesses

Documented features: SIHOO's UK store gives a seat height of 46 - 54 cm (18.11 - 21.26 in) and a seat width of 51 cm (20.08 in); the US store gives a seat depth of 15.15-17.12 in, general dimensions of 27 in wide, 30 in deep and 45-50 in high, a 330 lbs maximum load, a recline of up to 135°, a product weight of 49.13 lbs and a three-year warranty. The 4D coordinated armrests move up and down 2.76 in, forward and back 1.18 in, side to side, and rotate 72°. SIHOO describes the lumbar as dual dynamic lumbar support, and the headrest is integrated and adjusts up or down, with the upper backrest set in five levels. SIHOO designs the chair for users from 5 feet to 6 feet 3 inches.

Check before buying: The S100's seat depth range is shorter than the E3 Pro's, so sitters with long thighs should measure. Its arms do not flip or swivel the way the HBADA arms do. SIHOO's UK store lists a lower load figure than the US store; we show the US figure. The regular US price is $499.99 for Black and $509.99 for White, and both were shown as sold out on 2026-10-08.

How they differ

Price. At regular US prices the Doro S100 ($499.99-$509.99) lists about 150 to 160 dollars below the E3 Pro without footrest ($659). The E3 Pro with footrest is $709.

Warranty. The E3 Pro has 5 years on the base, gas lift and casters and 3 years on other parts; the S100 has three years overall. The difference is on the load-bearing parts.

Seat. Seat height is nearly identical: 46–54.5 cm against 46 - 54 cm. Seat depth is not: 45–50 cm on the E3 Pro against 15.15-17.12 in on the S100, so the HBADA seat is longer at every setting.

Recline. 140° maximum in four positions on the E3 Pro; up to 135° on the S100.

Arms, lumbar and headrest. The E3 Pro publishes more adjustment: arms that swivel and flip, a lumbar with height and depth settings plus side wings, and a headrest with forward/backward travel. The S100 keeps it simpler with 4D arms, a dual dynamic lumbar and a headrest that moves up or down.

Who should buy which

Pick the SIHOO Doro S100 if your budget is closer to the lower list price, your thighs suit a shorter seat, and you prefer fewer settings to adjust. Pick the HBADA E3 Pro if you want a longer seat, the 140° recline, armrests and lumbar you can tune in more directions, and a 5-year cover on the core parts. If you like the S100 but want a lumbar pad that tracks the backrest by itself, the SIHOO Doro C300 is the next SIHOO model to look at.

Sources

• HBADA US, UK and EU official stores — E3 Pro Ergonomic Office Chair 2026 Edition product pages (specifications, regular price, warranty), checked 2026-10-08.
• SIHOO US and UK official stores — Doro S100 product pages (specifications, regular prices, warranty), checked 2026-10-08.

Bottom line

Same 330 lb US load rating and almost the same seat height range. The SIHOO Doro S100 is the simpler, lower-priced chair; the HBADA E3 Pro costs more but adds a longer seat, a deeper recline, more adjustable arms and lumbar, and a longer warranty on core parts. Check stock on the S100 and the live sale prices on both stores before ordering.