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I have got my system running now and was looking for some comparison information.Since this is my first system i have nothing to compair to.I have a Buderus g124x boiler with st300 indirect,Wirsbo system pro controls.3500 ft 1/2 pex in light weight concrete.I have yet to insulate the floor since the home is on a basement and work is still going on.I am surprised to see that gas consumpion is at 6 therms a day average with an average outside temp of 46 degres.We are holding the interior temp at 62 indicated on the thermostat but it feels more comfortable then that.We have not been using much hot water since the home is not ocupied.Another thing i find interesting is that i can moniter the gas usage on the internet in real time and some days the usage drops to just 2 therms.
Can i here from some of you regarding what you see in the real world for consumption with these systems.I was surprised when i got my first bill and am hopfull that it will go down or mabee not.