We have a landed house in Bukit Timah and all the windows in the bathrooms are "open" in that there are no screens or windows that prevent heat and pests from coming in--just the glass louver-slats affixed to the outside of the windows that cannot be moved or removed; apparently standard in older houses. We're looking for a solution to close our windows in so as not to let the aircon out, while also keep the heat and pests from coming in.
I know we can add those magnetic screen to block incoming pests, but that still won't block the aircon from escaping, or the heat from coming in. I've had two "handymen" out to assess the windows and both have offered opaque sliding glass "window panes", but those block light from coming in. Apparently there aren't such a thing as clear plexi or glass options as we've been told??
Has anyone done anything similar to what we'd like to do in our bathroom windows that might provide a couple alternative solutions? Would be grateful for your assistance. Kind thanks in advance.