We live in a staggered terrace house. our boiler needs to be replaced, but we have been told due to new laws we are unable to use our internal flue. The only way to get the flue out is to drill out on the only outside wall, which would lead into our neighbours garden. We have said we will put a flume kit on so any air will be upwards towards the sky. But they have said no..How else can we get our boiler vented.