[1] The company, located in Boston, Massachusetts, introduced its heliostat system for sale in February 2009.

[2] According to the detailed agenda for the 5th Annual Conference on Clean Energy in Boston, Practical Solar’s chief operating officer David Howell[3] made a presentation seeking funding for the company at the “Investor Pitch Session” on November 12, 2009.

[6] To put this in perspective, the heliostats in a solar power tower project in Seville, Spain each have reflectors nearly 1,300 square feet (120 m2) in size (120 square meters).

[8] Practical Solar’s founder Bruce Rohr suggested in Northeast Sun magazine that small heliostats are “more reliable and more cost-effective per square meter of reflective area” than the larger heliostats typically used in solar power tower projects.

[10] Practical Solar’s web site states that residential customers also use their heliostats for direct space heating, drying mold, melting ice dams on roofs, and melting snow.