Source: USDA, Office of the Chief Economist, Office of Energy Policy and New Uses, April 2011 (Page 37)
Authors:
Irene M. Xiarchos; is a Natural Resource Economist and Policy Analyst at the Office of Energy Policy and New Uses, Office of the Chief Economist of the USDA.
Brian Vick; is the Lead Scientist of the Renewable Energy group at the Conservation and Production Research Lab of the Agricultural Research Service of the USDA

Author: David S. Brown, Captain, USAF AFIT/GCA/ENV/09-M03
Department Of The Air Force Air University - Air Force Institute Of Technology

Author: John Hollick, Conserval Engineering
SolarWall® solar heaters are ideally suited for preheating fresh air required in buildings. Heat recovery ventilators (HRV) and heat wheels are designed to recover heat from exhaust air to also preheat fresh air. Designers have asked whether the two technologies can work together and, if so, what economic and technical issues need to be addressed.

Author: John Hollick, Conserval Engineering
A landmark paper on the benefits of PV thermal cogeneration systems was presented on July 11 at the 2007 American Solar Energy Society Conference in Cleveland.

Source: John Hollick, Conserval Engineering
"The SolarWall® system heats ventilation air , fresh air and make-up air. It heats fresh air directly to achieve as high an efficiency as possible and to improve indoor air quality. The SolarWall systems are unglazed, and are all designedto heat or preheat outside air as it enters a building."

Source: National Renewable Energy Laboratory (NREL), a U.S. Department of Energy national laboratory
"This R&D 100 Award-winning technology is the product of the practical initiative of Conserval - a private solar heating and energy conservation company that markets the technology as SolarWall^©"

Source: U.S. Department of Energy
"This very simple solar collector passively preheats ventilation make-up air via a large, unglazed solar collector. These collectors are most effective on south-facing building facades, though significant deviation off true south (plus-or-minus about 60 degrees) results in only minor loss of performance. The Canadian company Conserval Engineering, Inc., has pioneered this system under the tradename Solarwall."

Source: Canadian Solar Industries Association (CanSIA) in association with Natural Resources Canada (NRCan)
"The city estimates that they will save $10 million per year when all the buildings have been upgraded with new technologies. There will also be an increase in the comfort level within the buildings and a reduction in long-term maintenance costs, as technologies such as SOLARWALL are maintenance free."

Source: Office Of Industrial Technologies Energy Efficiency and Renewable Energy - U.S. Department Of Energy
"Conserval’s Solarwall systems capture solar energy to preheat air, greatly reducing fuel demand by combustion systems and saving energy and money while maintaining or increasing ventilation, preheating industrial combustion air, or fully heating air for crop  drying. The secret is in—or more precisely through - the holes."

Source: Natural Resources Canada (NRCan)
"The simplest, most efficient - and least expensive - way to preheat outside air for industrial and commercial applications is through the use of a perforated-plate absorber or a solar air heating system, such as the SolarWall^®."