All ceiling diffusers are not created equal. A simple smoke test comparison reveals the superior cooing efficiency of Hart & Cooley diffusers. See why the Hart & Cooley design is the most effective design.
Jan. 7, 2010
All ceiling diffusers are not created equal. A simple smoke test comparison reveals the superior cooing efficiency of Hart & Cooley diffusers. See why the Hart & Cooley design is the most effective design.