While performing Energy Analysis, is it advisable to model interior furniture's as interior surfaces in Openstudio, as I have read somewhere that they delay the cooling load ? Do engineers consider interior furniture's or is the contribution of such surfaces very small ?

While performing Energy Analysis, is it advisable to model interior furniture's as interior surfaces in Openstudio, as I have read somewhere that they delay the cooling load ? Do engineers consider interior furniture's or is the contribution of such surfaces very small ?