Overall height

• A low overall product height reduces the physical effort and coordination needed to fill a device. Overall height facilitates use by all household members, including children, handicapped persons, and the elderly.

Key indicators

• The height a vessel needs to be lifted to fill the device should not exceed the median shoulder height of target users.
• Overall height provides sufficient height of water over the filter element (head height) to ensure acceptable flow rates without exceeding overall height targets.

Notes and exceptions

• Arm strength is reduced when an object is lifted above shoulder height.
• Greater pour-over heights increase the risk of spillage, compromise ease of use, and may limit use by some household members.
• Product height should account for the variability of placement locations, from floors to counters to furniture.
• If a stand is included or assumed, it must be accounted for within the overall device height.
• Users may rest the neck of the pouring vessel on the upper rim of the device. It may be beneficial to consider reinforcing this area.

Supporting evidence

• Chow AY, Dickerson CR. Shoulder strength of females while sitting and standing as a function of hand location and force direction. Applied Ergonomics. 2009;40(3):303–308.
• Full list of supporting evidence and additional materials.