central heating Home › Forums › Public Forums › General Plumbing › central heating This topic has 1 reply, 2 voices, and was last updated 21 years, 8 months ago by Guest. Viewing 1 reply thread Author Posts 2 Jul 2001 at 7:13 pm #275043 MasterPlumbersKeymaster is there a quick and simple guide to working out the room , radiator sizes,B.Th.U’s for any house size.i really would appreciate any helpthatis given its been a long time since i’ve done this i can’t remember the sums required. 2 Jul 2001 at 9:08 pm #290981 GuestParticipant You can do this online for free at http://www.hydronic.net There is a full explanation and the tools there. Author Posts Viewing 1 reply thread You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In