Initiate the process for financial support and subsidies. Some programs require applications early in the design period and designate only approved vendors.
Many PV panels are very sensitive to shading, so shade on even a small part of the panel reduces its output significantly. Discuss the structural requirements with a qualified vendor and structural engineer. Some types of PV, such as thin-film, are less sensitive to shading, but are also less efficient overall.
Consider space requirements and access. For PV, look for shadows, evaluate for optimal solar radiation and the angle of incidence during peak generating season. If possible, consider solar tracking system that follows the sun during the day and throughout the year. This would allow more electricity generated from the same area, though with more infrastructure cost. (See Resources.)
Consider building design and optimized energy performance before finalizing renewable energy calculations. Use estimates of the project’s annual energy use and costs to help determine what percentage of onsite
A mechanical system with more individual controls may cost more than a conventional system. This cost can be offset, though, by lower operating costs, a more flexible layout, and improved occupant productivity.
Operable windows, although offering some energy and comfort benefits, have some drawbacks. They allow in outside air, which may not be of the highest quality, and also allow in outside noise. The unconditioned air they allow in can affect the operation of mechanical systems.
