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An example of a homemade unit. The Corsi–Rosenthal Box is a design for a do-it-yourself air purifier that can be built comparatively inexpensively. It consists of four [1] or five [2] [3] HVAC particulate air filters that form a cube and a box fan to draw air through the filters.
Tree shaping (also known by several other alternative names) uses living trees and other woody plants as the medium to create structures and art. There are a few different methods [2] used by the various artists to shape their trees, which share a common heritage with other artistic horticultural and agricultural practices, such as pleaching, bonsai, espalier, and topiary, and employing some ...
Air streams are mixed to save energy and improve energy efficiency by partially recirculating conditioned air.. The most common application for an air-mixing plenum is the mixing of return air (or extract air) with fresh air to provide a supply air mixture for onward distribution to the building or area which the ventilation system is serving. [1]
A household electric fan A large cylindrical fan. A fan is a powered machine that creates airflow. A fan consists of rotating vanes or blades, generally made of wood, plastic, or metal, which act on the air. The rotating assembly of blades and hub is known as an impeller, rotor, or runner. Usually, it is contained within some form of housing ...
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One of the most important pieces of equipment in a complete hand tool woodworking shop is a shaving horse. In this second of two segments, join Roy Underhill as he finishes construction of his shaving horse and demonstrates how to use a spokeshave or draw knife to work wood accurately and effectively.
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Flowers appear in clusters in the leaf axils or on old wood from August to November. The large rounded egg-shaped fruit are 3.5–5 cm (1–2 in) long and 4–4.5 cm (2–2 in) wide. The fruit surface is wrinkled and may have a network of veins tapering to a short beak.