SOLAR GRATES: Frequently Asked Questions (FAQ)
Q: How can we get grates to try out? A: Grate Shade grates are not yet commercially available. DIY is an option.
Q: What if we want to perserve the view from one window? A: This is normal. Make it part of your plan.
Q: Why can't I just install the Grate inside the window? A: Don't bother. You won't get the energy savings because the radiant heat will pass the window and be trapped inside and become part of the a/c load.
Q: How do Grates compare to other savings projects like solar panels, insulation, cfl light bulbs, etc.?
A: Good question. The best overall strategy seems to involve: seal the living space, insulate, install photovoltaic panels, manage sunlight entering the building seasonally, and install more efficient appliances either outright or when replacement is necessary. Beyond this, favor projects with proven payout-in-use comparable to best practices. Grates presently have about a 10 year materials payout in climate zone 5 and this might reach 2-3 years with a manufactured design, DIY labor, and application in the Sunbelt.
Q: Can the grate be installed on the outside from the inside? A: Maybe. This depends on the mounting design, the window type, safety considerations, et al. Experience with the prototype design has been installed from outside;
Q: What are the tradeoffs with a deeper grate? A: A deeper grate will block more infrared, have little effect on visible light, and increase cost and weight of the grate. A deeper grate will also narrow the angle for a view looking outward.
Q: Do Grates qualify for a tax credit? A: No tax consulting here. Opinion: if devices that reduce solar heat gain qualify, then Grates should qualify.
Q: Is there a max size for Grates? A: Experience suggests a max width of 2' and a max length of 6' for reasonable handling and structural integrity. For a 6' x 6' picture window consider a battery of 3 @ (2' x 6').