BSRIA definitions A - I

This list provides links to definitions created by BSRIA that have been published on Designing Buildings, along with the date added.

This page includes definitions A to I. Click here to see definitions J to Z.

See also a list of articles by BSRIA on Designing Buildings.

1. ‎6LoWPAN. October 2024
2. Ablative batt. April 2021.
3. Absolute pressure. November 2022
4. Absorption chiller. November 2021
5. Absorption cooling. November 2021
6. Accelerator heater. June 2023
7. Acceptance criteria. February 2025.
8. Acceptance factor. November 2022
9. Acoustic camera. December 2023
10. Acoustic flexible ductwork. December 2023
11. Activated carbon filters. August 2022.
12. Adenosine triphosphate. November 2021
13. Adhesive anchor. December 2023.
14. ‎Adsorption cooling. November 2021
15. AECB CarbonLite Building Standards. March 2024
16. ‎Aerobic. November 2021
17. Aerobic count. July 2022.
18. Air capture hood. January 2024.
19. Air changes per hour. March 2024.
20. ‎Air systems. February 2025.
21. Air turbulence. March 2023
22. Alkalinity. November 2021
23. Alpha-beta brass. November 2021
24. Ambient loop heat pump system. January 2022
25. American National Standards Institute. September 2021
26. American Society of Heating and Air-conditioning Engineers. September 2021
27. Amoeba. July 2022.
28. Analogue control systems. July 2022.
29. Analogue input. June 2023
30. Analogue output. June 2023
31. ‎Anion. November 2021
32. Annular space. April 2021.
33. Anode. November 2021
34. Antiflash margin. November 2022
35. Antifreeze. November 2022
36. Antigravity loop. November 2022
37. Appliance isolation valve. July 2022.
38. Approach temperature. July 2022.
39. As-built data. June 2022
40. As-installed drawing. March 2024.
41. Aspergillus. January 2025.
42. Atmospheric boiler. June 2021.
43. Automat. November 2022.
44. Automatic air vent. July 2022.
45. BACnet. August 2023.
46. Ball valve. June 2021.
47. Barometric pressure. March 2023
48. Base case: July 2022
49. Basin isolation valve. July 2022.
50. ‎Batten luminaire. July 2021.
51. Biocide. April 2021.
52. Biogenic. March 2022
53. Biomass CHP. November 2021
54. Bladder. November 2022
55. Blow-down. July 2022.
56. ‎Bluetooth low energy. October 2024
57. Boring. September 2024
58. Break tank. November 2022
59. British Standard Pipe. July 2022.
60. Builders’ work details. June 2021.
61. Building energy management system v building management system. June 2023
62. Building services concept design model. May 2021.
63. Building services concept schematics. May 2021.
64. Building services concept sketch drawings. May 2021.
65. Building services contractor. May 2021.
66. ‎Building services developed design schematics. May 2021.
67. Building services plant. August 2022.
68. Building services technical design model. May 2021.
69. Busbar. April 2021.
70. Butterfly valve. June 2021.
71. By-product. March 2022.
72. Cable carrier. April 2021.
73. ‎Capital energy. March 2022
74. Cascade control. July 2023
75. Category A fit-out works. August 2021
76. Category B fit-out works. August 2021
77. Cathode. November 2021
78. Cation. November 2021
79. Cavitation. November 2021
80. Cavity collector. November 2021
81. Central plant. August 2022.
82. Charged-media non-ionising filters. August 2022.
83. Chelant. April 2021.
84. ‎Chemical cleaning. January 2024.
85. Chlorinate. July 2022.
86. Chlorine dioxide. July 2022.
87. Circuit breaker. July 2021.
88. Clash. May 2021.
89. Cleanliness quality class. December 2023.
90. Closed loop heat pump system. January 2022.
91. Coefficient of expansion. November 2022
92. Co-product. March 2022
93. Coincidence factor. July 2022.
94. Cold aisle containment. March 2024
95. Cold smoke. April 2021.
96. Collar. April 2021.
97. Colour changing controls. August 2023.
98. Colour temperature. July 2021.
99. ‎Commissionability December 2023.
100. ‎Commissionable system. December 2023.
101. Commissioning consultant. February 2025.
102. Commissioning management. December 2023.
103. Commissioning manager CxM. July 2024.
104. Commissioning set. June 2023
105. Commissioning specialist. December 2023.
106. Commissioning specification. December 2023.
107. ‎Compensators. July 2021.
108. Compliance maintenance. July 2022
109. Compliance model. October 2024.
110. ‎Compressed air energy storage. January 2022.
111. Condensation pipework. August 2022.
112. Condition monitoring. July 2022.
113. ‎Constant flow regulator. August 2022.
114. Constant volume damper. January 2024.
115. Constant volume system. August 2022.
116. Continuous commissioning. January 2024.
117. Control damper. August 2023.
118. Controller. July 2022.
119. Coordinated-generic technical design model. May 2021.
120. Coordinated-specific technical design model. May 2021.
121. Copper / silver ionisation. July 2022.
122. Corrective maintenance. March 2024
123. ‎Corrosion coupon. November 2021
124. ‎Corrosion inhibitor. November 2021
125. Cradle. March 2022
126. Crevice corrosion. November 2021
127. Cyclic stress. July 2022.
128. DC offset. October 2024
129. Dead zone. July 2023.
130. Deaerator. November 2021
131. Decentralised plant. August 2022.
132. Deep learning. October 2024.
133. Delivered energy. March 2022
134. Demand-controlled ventilation. August 2022.
135. Denial-of-service. November 2024.
136. ‎Desiccant cooling. November 2021
137. ‎Design criteria. December 2023.
138. Detergent. April 2021.
139. Dezincification. November 2021
140. Differential pressure anemometer. January 2024.
141. Differential pressure control valve. April 2021.
142. Digital Addressable Lighting Interface. July 2023.
143. Digital input. July 2023.
144. Digital output. July 2023.
145. Dip slide. November 2021
146. Direct digital control systems. July 2021.
147. Direct heat interface unit. July 2022.
148. Dispersants. April 2021.
149. Display lighting. July 2021.
150. ‎‎Diversity factor. February 2025.
151. Domestic water services. July 2022.
152. Double regulating valve. August 2022.
153. Downlighter. July 2021.
154. Downstream impacts. March 2022.
155. Drain valve. July 2022.
156. Drift eliminator. July 2022.
157. Drilling. September 2024
158. Drinking fountain. July 2022.
159. Dual-fuel boiler. June 2021.
160. Ductwork leakage. July 2024.
161. Electric current. July 2021.
162. Electric quartz heaters. July 2021.
163. Electrolyte. January 2022
164. Entropy. January 2022
165. ‎Electrostatic filters. August 2022.
166. ‎Electronically positioned actuators. August 2023.
167. EnerPHit Standard. March 2024
168. Environmental monitoring. June 2022
169. Equivalent annual cost. July 2022
170. European Assessment Document. April 2021.
171. Exhaust air vs extract air. August 2022.
172. Expansion anchor. December 2023.
173. Factory acceptance test. March 2025
174. Fan convector. July 2022.
175. Feasible-generic technical Design model. May 2021.
176. Feedstock energy. March 2022.
177. Field device. July 2023.
178. ‎Fill water. November 2021
179. ‎Fine tuning. March 2025
180. First party operation and maintenance audit. October 2024.
181. ‎Fitwel. February 2025.
182. Fixed gas cushion expansion vessel. November 2022
183. Flat face seal. July 2022.
184. Flexible construction. April 2021.
185. Flexible ductwork December 2023.
186. Float valve. July 2022.
187. Flocculant. April 2021.
188. ‎Flow battery. January 2022
189. Flow characteristic. April 2021.
190. Flow coefficient. July 2023.
191. Flow regulating valve. July 2022.
192. Fluctuation of the supply voltage flicker. October 2024
193. ‎Flushing. January 2024.
194. ‎Flywheel. January 2022
195. ‎Forced-draught boilers and induced-draught boilers. June 2021.
196. ‎Four-port control valve. June 2023
197. ‎Four-port valves. June 2021.
198. Free cooling. August 2022.
199. Front end. July 2023.
200. Function critical maintenance. July 2022
201. Functional specification. August 2023.
202. Functional performance testing. March 2025
203. Functional testing. July 2024.
204. Future value. July 2022.
205. Gas absorption heat pump. January 2022
206. Gas-fired plaque heaters. July 2021.
207. Gas-fired radiant-tube heaters. July 2021.
208. Gasification. November 2021
209. Gate valve. June 2021.
210. Gateway device. July 2023.
211. Gauge pressure. November 2022
212. ‎Gateway protocol. August 2023.
213. ‎Globe valve. August 2023.
214. Graphical user interface. July 2023
215. Gravity drainage. July 2022.
216. Hard water. November 2021
217. Harmonics. October 2024
218. Harmonic voltage. October 2024
219. Head end. July 2023.
220. Health Technical Memorandum. May 2021.
221. Heat substation. July 2022.
222. Heating and cooling diversity. January 2024.
223. Heating value. March 2022.
224. Heat network mains. July 2022.
225. High-bay luminaire. July 2021.
226. High temperature heat network. July 2022.
227. High temperature thermal storage. January 2022.
228. Hold point. June 2022.
229. Hot water radiant panels. July 2021.
230. Hot water radiant-strip heating. July 2021.
231. Human-machine interface. July 2023
232. Hydronic system. March 2024.
233. ‎Hypercat. October 2024
234. ‎Hypocaust. November 2021
235. Identity theft. November 2024.
236. Intermediate vessel. November 2022
237. Indirect heat interface unit. July 2022.
238. ‎Inductive tachometer. January 2024.
239. ‎Industrial Internet Consortium. October 2024
240. ‎IEEE 802. October 2024
241. Inhibitor. April 2021.
242. Initial project brief. April 2021.
243. Initial success criteria. April 2021.
244. Installation model. June 2021.
245. Integral control. July 2023
246. Integrated control system. July 2021
247. Integrated systems testing. March 2025.
248. Interharmonics. October 2024
249. International Electrotechnical Commission. September 2021
250. International Telecommunication Union. September 2021
251. Ion. January 2022
252. ‎Ion exchange plant. November 2021.
253. ‎IoTivity. October 2024
254. ‎IPSO Alliance. October 2024
255. ‎ISA 100.11a. October 2024

--BSRIA