最近收到了HomeBuyer Report, 一共有两个2两个3，剩下都是1. 涉及到3的两个问题我拿不准，想请教下大家的看法。
第一个问题是关于烟雾和一氧化碳报警器的，原文如下：
The property does not have any mains powered smoke/fire or carbon monoxide alarms.
It would be prudent to install mains powered smoke/fire and carbon monoxide alarms.
Condition Rating 3
This is a risk to persons, and we refer you to our comments in section J.
这个报警器是不是以后我自己买就行，也不用布线什么的吧？
特别是第二个问题，关于consumer unit的，原文如下：
The meter is in the outside meter box. The meter and consumer unit can be found in the cupboard. The consumer
unit contains older type wire fuses to protect users should there be a defect with the installation. Where visible, the
installation has been wired in plastic covered cable. We do not know if there is a current test certificate for the
electrical installation.
The consumer unit contains no modern cut-off devices.
Condition Rating 3
You should ask an approved electrical engineer registered with either the National Inspection Council for Electrical
Installation Contracting, (NICEIC), or with the Electrical Contractors Association, (ECA),
to inspect and test the electrical installation and report to you before exchange of contracts as
there is no current test certificate for the system as no modern safety cut-off devices are present. We refer you to
the page in this report entitled ‘What to do now’.
This is a risk to persons, and we refer you to our comments in section J.
我是不是要换一个新的consumer unit？那大概需要多少钱呢？
