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OM Seating  |  SKU: EF74

Office Master Electrostatic Discharge ESD Multi Function Ergonomic Chair (Fabric) | EF74

$669.50

The Office Master EF74 is an electrostatic discharge (ESD) mid-back ergonomic chair designed for task-focused workspaces that require both comfort and static protection. This model is the ESD version of the PT74 chair, offering reliable daily performance with fabric and vinyl options designed for static control.

Highlights

  • ESD-ready upholstery: fabric blends with 99% nylon and 1% carbon fiber to provide durable static dissipation while staying comfortable.
  • Color and material options: seven ESD fabric colors and two ESD vinyl options to match your workspace aesthetics.
  • Seat height range: 17" to 22" to accommodate a wide range of users and desk setups.
  • Weight capacity: supports up to 300 lbs for dependable daily use.
  • Design: mid-back ergonomic support paired with a multi-function mechanism for tailored adjustments.
  • Construction: built on the popular PT74 platform for proven reliability in ESD seating environments.
  • Ideal environment: suitable for task-driven settings such as electronics assembly, labs, and other static-sensitive work areas.

Shipping & Returns

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Dimensions

Model/Sku Office Master EF74
Overall Width 27"
Overall Height 35-44"
Back 17"w x 18"h
Seat 20"w x 17-20.1"d
Seat Height 17-22"
Chair measurements are approximate and are based on switching cylinder heights on otherwise the same chair, with the same base and casters. Arm dimensions are approximate as actual measurements will vary depending on a variety of factors: cushion contour(s), seat upholstery, memory foam, etc.

Downloads / Info

Downloads

Warranty

Office Master, Inc. (OM) warrants to the original purchaser that its products are free from defects in materials and workmanship for the applicable warranty period, as indicated below. 

Should any item fail, OM will – at its sole discretion – repair or replace, with a comparable product or part, any item found to be defective as a result of normal commercial use (i.e., a single 8-hour shift, 5 days per week).

This warranty does not apply to items subjected to abuse, misuse, neglect, alteration, or damage caused by shipment, storage, accident, fire, flood, or act of God.

Note: the actual warranty terms are specified on the chair product page. 

lifetime limited warranty:

The OM5 Series® (including the OM5 Active sub-series), Truly.® Series, and Ginny are covered by a lifetime limited warranty on all structural components as defined below.

12-year limited warranty:

Unless otherwise specified, all models not classified as budget or 24/7 or heavy-duty are covered under a 12-year limited warranty on all structural components as defined below.

7-year limited warranty:

Unless otherwise specified, all models classified as budget or 24/7 or heavy-duty or bariatric are covered under a 7-year limited warranty on all structural components as defined below. Budget series include: BC, SG, ST, and WS. Bariatric series includes: GY4B-26 and GY4B-30.

warranty terms:

Within a given model’s applicable warranty period, all structural components, including gas cylinders, wood, metal and plastic parts (i.e., chair frames, bases and control handles) are guaranteed against structural failure when under normal commercial use. All OM seating comes with a default 275 lbs. weight capacity limit unless otherwise specified by OM. 

For all models, consumable items (i.e., casters, glides, etc.) are covered by a 5-year normal commercial use warranty.

fabrics and foam:

OM in-stock upholstery & foam cushions are covered by a 5-year normal commercial use warranty. Normal wear and tear on fabrics such as wrinkling, dirt accumulation or gathering is not covered. This includes Truly.® Series “Jackets” and “Wraps”. Natural, minor variations may exist in color, surface, grain or texture of upholstery materials. As a result, any such variations are not warranted. COM/COL and graded-in fabrics are not covered.

warranty labor:

This warranty exclusively covers the repair or replacement of OM parts as determined by OM and does NOT cover any portion of field labor or service and does NOT cover any portion of field labor or service. For information regarding OM’s non-warranty shop time and related charges, please reference a current copy of OM’s pricebook, in the Terms and Conditions section.

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