See the 10min guide in the wiki page
Can be found in the wiki
Madsen, Henrik, and Jan Holst. "Estimation of continuous-time models for the heat dynamics of a building." Energy and Buildings 22.1 (1995): 67-79.
Bacher, Peder, and Henrik Madsen. "Identifying suitable models for the heat dynamics of buildings." Energy and Buildings 43.7 (2011): 1511-1522.
Sonderegger, Robert. "Diagnostic tests determining the thermal response of a house." Lawrence Berkeley National Laboratory (2010).