I've just had a quote for installing 2 radiators. The quote includes 8 hours labour each for the installer and his assistant (i.e. it will take the two of them a working day). The pipework is already in place, as the radiators to be installed are replacing existing radiators, but I realise that there will be some additional pipework required. Does 8 hours each seem reasonable? I've no idea what is involved. Thanks.