MESA, AZ — (Marketwire) — 07/14/11 — Retrotec Energy Innovations, Ltd., the world leader in blower door systems, has introduced the lowest production cost to come out of their engineering department to date, the Model US1000.The fan incorporates a wide range of exclusive innovations into a new, lighter fan. The new design allows for more air flow with less weight, heat, and energy loss in any accurately calibrated fan.The US1000 fan is made to be so strong that it does not require a case
