Branson School


Project: Branson School, Ross, California

Firm: Turnbull Griffin Haesloop

Product: Two 10-ft (3-m) diameter Powerfoil® fans

Tags: ,

“The Big Ass Fans and the natural ventilation of the space keep it nice and cool—I’ve been in there on 90°F (32°C) days and it’s still perfectly comfortable inside.”

John Kleman
Turnbull Griffin Haesloop

Project Summary

In order to create a building that was comfortable year round without relying on air con, the Turnbull Griffin Haesloop Architects augmented the natural airflow patterns of the building’s site. With large tilt-up doors and additional airflow from large diameter, low speed overhead fans, the building remains comfortable without mechanical cooling.

This careful design, combined with two 10-ft (3-m) diameter Powerfoil® fans from Big Ass Fans, keeps air moving throughout the space. Although ceiling fans do not lower the temperature in a space, the perceived cooling effect of air movement can make occupants feel up to 10°F (5.6°C) cooler. “We did a digital rendering of the fluid dynamic model to optimise the air flow to the building, explained Associate John Kleman of Turnbull Griffin Haesloop. Based on these results, the architects altered the size of windows and openings to take full advantage of the building’s orientation and prevailing winds. “We thought, let’s not condition the air, but use the climate that we have,” said Mary Griffin, FAIA, of Turnbull Griffin Haesloop. “We wanted kids to be eating outdoors as many days of the year as possible, so having the building open so that they could go in and out was really important.”

Project Gallery