Chatterley Whitfield: boiler house (16) and chimney (3)

The site includes a boiler house of around 1937 and a chimney dating to 1891. A dust sampling laboratory, numbered 17, is not included in the listing.

The boiler house is constructed with a steel frame and brick infill panels. The chimney is brick, reinforced with steel straps. The boiler house is roughly rectangular in plan, with the circular chimney located to the south.

The boiler house was formerly a large, single-storey building, but the roof and high-level steelwork were removed in the late 20th century. The steel frame is visible on all sides, supporting single-skin brick panels. The interior was not inspected in 2013. Ten Lancashire boilers are arranged symmetrically in rows of five to either side of a central access gallery, contained within brick chambers. These chambers are covered by pre-cast concrete with a brick lining. A raised concrete floor is located to the front (north) of the boilers. Attached to the rear of each bank of boilers is a continuous brick flue, covered with concrete. These flues run across the building and lead into a brick collection chamber next to the chimney, where flue gases were gathered. Water economisers of vertical steel tubes with brick walls are located on either side of the collection chamber.

The late 19th-century chimney is a tapering structure with a base diameter of 6.5 metres. It originally stood approximately 60 metres high but has been reduced in height and strengthened with steel straps, some of which date to the late 20th century. Former access points at the base have been filled with brick, and brickwork flues connect the chimney base to the adjacent boiler house.

A dust sampling laboratory of around 1938 is attached to the north side of the boiler house. This two-storey building has a steel frame with brick infill panels under an asbestos cement pitched roof. There is a single-storey range attached to the east side, and a two-storey lean-to attached to the south. The building has metal-framed windows, a pedestrian doorway in the west gable end, and a loading bay with roller shutters on the east elevation of the single-storey range. The ground floor has been partially subdivided with blockwork partition walls. This structure is considered to be of no special architectural or historic interest.