It is suggested that the air conditioner __________________

It is suggested that the air conditioner __________________ (要安装在窗户旁).
be installed beside window为什么不加冠词the?
should be installed by the window,为什么可以用by?我用by的情况只有by bus,by hand……by跟beside哪个好?难道beside是初中词汇?
(should) be installed by the window
be set aside这个答案很特别,
我第一次做这道题的答案是：will be installed beside the window.
It is suggested that,我马上感觉是It is said that 被动语态,是一般现在时,那么从句可以用将来时,所以用了will
当时没反应过来考suggest……必须用(should)
我翻译句子有时候时态不对,你们帮我分析一下毛病
补充：
is to be installed next to the window可以吗？
用fixed可以吗？
这两个翻译如何？