Do you have your duced heater serviced regularly?

hsy12

本帖最后由 hsy12 于 2013-11-21 12:01 编辑
收到plumber的广告：
Having your gas heaters serviced regularly is very important for your safety. If you don't get this done every 2 years it can be a real danger ... blah blah blah. Servicing gas heater is now law; blah blah blah.
不知道大家有没有定期保养？保养一次多少钱？谢谢！