i am trying to estimate the energy savings in the interior mall , (arcade & attrum) of a shopping center from seting up the cooling setpoint thermpurture of rooftop packaged units , the zone im studing is surrounded by (conditioned)retail stores witch im not including in the study,the roofs & ground are not insulated, the internal loads & solar gains are very importante.

So my question is can i use the variable base degree day methode to estimate the savings by reducing the cooling load when seting up cooling set point?

I performed a regression analyses i found good correlation between HDD & the electrical consumption , but no correlation between the CDD & the Electrical consumption .