The Effects of Exterior Thermal Mass (eTM) on Energy Consumption in Residential Buildings

Amir Ghoreishi (1)
(1) PhD LEED, United States


Exterior Thermal Mass (eTM) is known to improve building energy and thermal comfort performance. Despite its known benefits, studies to date have not thoroughly addressed the effects of eTM on building environmental performance by considering a wide range of influential factors and various climatic conditions. This paper addresses such a gap in the body of knowledge by conducting a comprehensive and detailed analysis of eTM impacts on residential buildings’ energy performance. Using quantitative research and simulation analyses, this study has found various trends of energy reductions and, in a few cases, energy increases depending upon the location of projects. In fact, the cooling energies are shown to increase of up to 4% for the scenario of 20 cm thickness wall in several locations. Aiming for better energy and design load scenarios, this research has also established the optimal eTM depth to help architects and engineers make informed design decisions with regard to building envelopes, which is particularly important for developing countries with similar climates studied in this paper, where the use of masonry materials is widely common. As for future steps, further exploration of cooling energy increase phenomenon, which was observed for several climates is recommended. Also, coupling eTM with code-required thermal insulation based upon specific climatic locations and evaluate their integrated performance can be considered.

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American National Standards Institute, Energy Conservation Code, 2009.

Bellamy L.A., Mackenzie D.W., Thermal performance of buildings with heavy walls. Technical report, BRANZ, New Zealand; 2001.

Berg-Hallberg E., Realistic design outdoor temperatures. Batiment International, Building Research and Practice, 1985; 13 (5), 310–317.

Bojic´M., and Loveday D., 1997, “The Influence on Building Thermal Behavior of the Insulation/Masonry Distribution in a Three-layered Construction”, Energy and Buildings, 1997; 26 (2), 153–157.

Cetin K. S., Manuel L., and Novoselac A., 2016, Effect of Technology-enabled Time-of-use Energy Pricing on Thermal Comfort and Energy Use in Mechanically-conditioned Residential Buildings in Cooling Dominated Climates, Building and Environment, 2016; 96, 118–130.

Department for Communities and Local Government (UK), Building Regulations, Approved Document L: Conservation of Fuel and Power, 2016.

Department of Energy and Climate Change, now Department for Business, Energy & Industrial Strategy, 2012 edition, revised 2014, The Government’s Standard Assessment Procedure for Energy Rating of Dwellings

Ghoreishi, A. H. and Ali, M. M., “Parametric Study of Thermal Mass Property of Concrete Buildings in U.S. Climate Zones”. The Journal of Architectural Science Review, 2013; 56 (2) DOI:10.1080/00038628.2012.72931.

Ghoreishi, A. H. and Ali, M. M., “Contribution of Thermal Mass to Energy Performance of Buildings: A

Comparative Analysis”, Journal of Sustainable Building Technology and Urban Development, 2011, 2 (3). 245-252.

Ghoreishi, A., and Murray, S., “How can coupled thermal mass with insulation in concrete office buildings improve energy performance?”, submitted, 2017.

Gori V., Marincioni V., Biddulph P., Elwell C. A., “Inferring the Thermal Resistance and Effective Thermal

Mass Distribution of a Wall from in Situ Measurements to Characterize Heat Transfer at both the Interior

and Exterior Surfaces”, Energy and Buildings, 2017; 135, 398–409.

Gregory K., Moghtaderi B., Sugo H., Page A., “Effect of Thermal Mass on the Thermal Performance of

Various Australian Residential Constructions Systems”, Energy and Buildings, 2008; 40 (4), 459–465.

Hoes P., and Hensen J.L.M., “The Potential of Lightweight Low-energy Houses with Hybrid Adaptable

Thermal Storage: Comparing the Performance of Promising Concepts”, Energy and Buildings, 2016; 110, 79–93.

Hoes P, Trcka M., Hensen J.L.M., and Bonnema, B. H., “Investigating the Potential of a Novel Low-energy House Concept with Hybrid Adaptable Thermal Storage”, Energy Conversation Management, 2011; 52 (6), 2442–2447. 9th International Conference on Sustainable Energy Technologies (SET 2010).

Johra, H., and Heiselberg, P., “Influence of internal thermal mass on the indoor thermal dynamics and integration of phase change materials in furniture for building energy storage: a review”, Renewable & Sustainable Energy Reviews, 2017; 69, 19–32.

Kinnane, O., Sinnott D., and Turner W., 2016, Evaluation of Passive Ventilation Provision in Domestic

Housing Retrofit, Building and Environment, 2016; 106, 205–218.

Portland Cement Association, <> [accessed 07-24-2017], 2017

Kircher K. J., and Max Z. K., “On the Lumped Capacitance Approximation Accuracy in RC Network Building Models”, Energy and Buildings, 2015; 108, 454–462.

Kossecka E., and Kosny J., “Influence of Insulation Configuration on Heating and Cooling Loads in a Continuously Used Building”, Energy and Buildings, 2002; 34 (4), 321–31.

Ma P., and Wang L., “Effective Heat Capacity of Interior Planar Thermal Mass (IPTM) subject to Periodic

Heating and Cooling”, Energy and Buildings, 2012; 47, 44–52.

Raftery, P., Lee E., Webster T., Hoyt T., and Bauman F., 2014, “Effects of furniture and contents on peak

cooling load”, Energy and Building, 2014; 85, 445–457.

Underwood CP., 2014, “An Improved Lumped Parameter Method for Building Thermal Modelling”, Energy and Buildings, 2014; 79, 191–201.

U.S. Department of Energy, 2008, DOE Develops Benchmark Models to Improve Building Energy Simulations. (accessed 02 April 2017)

van Hooff T., Blocken B., Timmermans H.J.P., Hensen J.L.M., “Analysis of the Predicted Effect of Passive Climate Adaptation Measures on Energy Demand for Cooling and Heating in a Residential Building”, Energy, 2016; 94, 811–820.

Wang L., and Ma P., “The Homeostasis Solution – Mechanical Homeostasis in Architecturally Homeostatic Buildings”, Applied Energy, 2016; 162, 183–196.


Amir Ghoreishi
[email protected] (Primary Contact)
Ghoreishi, A. (2019). The Effects of Exterior Thermal Mass (eTM) on Energy Consumption in Residential Buildings. ARCHive-SR, 3(1), 14–26.

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