Last edited by gennady; 09-05-2013 at 08:06 PM.
would you please provide more information on changes made to the buildings (insulation, windows, etc.) when modification were made to steam heating system and when steam boiler was replaced by condensing boiler. I'm very interested in your observations. Hot water condensing boilers has an impressive energetic efficiency (based on 1 Law of Thermodynamics) but percentage of usable heat is low (2 Law of Thermodynamics, Carnot ratio) - http://homeenergypros.lbl.gov/profil...-second-law-of
It works differently with steam boilers, looks like you have a live demo.
Last edited by izhadano; 09-27-2013 at 03:22 PM. Reason: broken link