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Thermal comfort and overheating investigations on a large-scale Passivhaus affordable housing scheme

Botti, A; (2017) Thermal comfort and overheating investigations on a large-scale Passivhaus affordable housing scheme. In: Brotas, L and Roaf, S and Nicol, F, (eds.) Design to Thrive: Proceedings of 33rd PLEA International Conference 2017, Volume III. (pp. pp. 3722-3729). NCEUB (Network for Comfort and Energy Use in Buildings) Green open access

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Abstract

The uptake of the Passivhaus standard has rapidly increased in the UK during the recent years, in line with the improvements in the energy efficiency standards for new dwellings. This paper builds upon a recently completed post-occupancy study for a Passivhaus-certified large-scale affordable housing development, specifically focusing on summer thermal comfort. Assumptions and predictions of overheating risk made at the design stage are analysed and compared with the indoor temperatures measured during summer 2015. In this study, interviews and questionnaires are overlaid with quantitative data in order to explore occupants’ comfort perception and improve the understanding of the inter-relationships between aspects of building design, occupant behaviour and the risk of overheating. The analyses showed a high frequency of overheating, diverging significantly from the estimates made using the PHPP tool. This is due to a combination of factors, such as higher internal heat gains arising from higher occupant density and usage of internal appliances and, in some cases, insufficient reliance on natural ventilation to purge excess heat. Given the difficulty in predicting in-use occupancy patterns at the design stage, a more robust design strategy is recommended, which could include measures to minimise summer overheating and future-proofing against a changing climate.

Type: Proceedings paper
Title: Thermal comfort and overheating investigations on a large-scale Passivhaus affordable housing scheme
Event: PLEA 2017, 33rd PLEA (Passive and Low Energy Buildings) International Conference, 3-5 July 2017, Edinburgh, UK
Location: Edinburgh, UK
Dates: 03 July 2017 - 05 July 2017
ISBN-13: 9780992895754
Open access status: An open access version is available from UCL Discovery
Publisher version: https://plea2017.net/
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: passivhaus, PHPP, overheating, monitoring, post-occupancy-evaluation
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of the Built Environment
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of the Built Environment > Bartlett School Env, Energy and Resources
URI: https://discovery.ucl.ac.uk/id/eprint/10059148
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