Closed system
The Chartered Institute of Procurement & Supply (CIPS) Glossary of procurement terms, defines a closed system as: ‘A system or process that, once started, does not allow new entrants. A framework agreement might have multiple buyers and multiple suppliers, but once set up no additional buyers or suppliers can be added to it.’
Water Treatment for Closed Heating and Cooling Systems (BG 50/2021), second edition, by Dr Pamela Simpson, published by BSRIA in 2021, states: ‘Closed systems are effectively sealed and the water inside the system is not exposed to the atmosphere. They contain a fixed volume of water that recirculates and tends to suffer only negligible water losses in normal operation.’
BG 87/2024, Useful Information Guide, written by Chin Hang “Kay” Lam and published by BSRIA in 2024, defines a closed system as: ‘A hydronic heating or cooling system which is effectively sealed. The water in the system is not exposed to the atmosphere and should suffer no, or only negligible, losses in normally operation.’
[edit] Related articles on Designing Buildings
Featured articles
Check out some of the best features and news from Designing Buildings as well as key stories from around the web.
The Building Safety Regulator announces a call for evidence.
Government approach could undermine delivery and regeneration.
World's first mass timber data centre.
The overlooked environmental aspect of data centre development.
Introduction to radon awareness
New technical information sheet published by CIOB.
Updated supplier guide can help electrical contractors engage with NHP.
CIAT confirm the winners of the 2026 architectural technology awards.
Government launches a one stop shop for flood preparedness.
Sir Edwin Lutyens: Britain's greatest architect? Book review.
CIOB publishes free template to help assess and manage risks.
ECA's reflections on Party Conference season
Burnham wants to be confident of winning before asking for a fresh mandate.
New Chief Construction and Scientific Adviser
Sergio Cavalaro, Professor of Infrastructure Systems at Loughborough University.
Building safety levy for England
CIAT publish estimator tool for members.