From Green Inc.
Amidst the general gloom in the renewable energy sector, one Toronto-based energy company is discovering a renewed appetite for a low-cost, low-tech solar air heating system based on one of the immutable laws of physics: hot air rises.
Conserval Engineering is responsible for SolarWall panels, made from corrugated and perforated galvanized steel. The cladding is affixed to south-facing walls of industrial and commercial buildings, creating a cavity in which sun-warmed air is vented up and into heating ducts.
Such systems reduce heating costs by cutting natural gas or electricity consumption – an important consideration for financially-strapped firms such as a Ford Motor Co. stamping plant near Buffalo, N.Y., that figures it’s saving $300,000 a year thanks to a 50,000 sq..-ft solarwall.