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<blockquote data-quote="benjamins" data-source="post: 317883" data-attributes="member: 700">Had no idea where to get honest information so I thought with the wealth of knowledge on here someone might be able to help me out.&nbsp; I built a house this summer, slab on grade around 2200 ft2 with a 250 ft2 bonus room and a 1200 ft2 garage.&nbsp; The house has floor heat with a propane on demand heater as well as a propane furnace.&nbsp; I have been using anywhere from 150 to 200 gallons of propane per month (even before this cold snap). Does this seem reasonable?&nbsp; It seems high to me especially since I have been keeping my garage at 40 (slab temp).&nbsp; We do live in the wide open so wind is an issue, I was just always under the assumption floor heat is really efficient?I also do not know how to set the floor heat temp vs the furnace.&nbsp; Should I use the floor heat for the main heat and only use the furnace for sudden cold snap to even things out?&nbsp; Or do I use the floor heat to keep the house around say 60 and use the furnace for more of the work? And since I have shown how little I know about anything, Do I use the air temp at the thermostat to control the floor heat or go off the inslab temp (keeping that at 82 keeps the house around 68).&nbsp; I tried going off of air temp and it seemed to frequently over shoot and make it too warm but maybe I didn't have things set right.&nbsp; Thanks for any insight and sorry for the painfully dumb questions!</blockquote>

[QUOTE="benjamins, post: 317883, member: 700"] Had no idea where to get honest information so I thought with the wealth of knowledge on here someone might be able to help me out. I built a house this summer, slab on grade around 2200 ft2 with a 250 ft2 bonus room and a 1200 ft2 garage. The house has floor heat with a propane on demand heater as well as a propane furnace. I have been using anywhere from 150 to 200 gallons of propane per month (even before this cold snap). Does this seem reasonable? It seems high to me especially since I have been keeping my garage at 40 (slab temp). We do live in the wide open so wind is an issue, I was just always under the assumption floor heat is really efficient? I also do not know how to set the floor heat temp vs the furnace. Should I use the floor heat for the main heat and only use the furnace for sudden cold snap to even things out? Or do I use the floor heat to keep the house around say 60 and use the furnace for more of the work? And since I have shown how little I know about anything, Do I use the air temp at the thermostat to control the floor heat or go off the inslab temp (keeping that at 82 keeps the house around 68). I tried going off of air temp and it seemed to frequently over shoot and make it too warm but maybe I didn't have things set right. Thanks for any insight and sorry for the painfully dumb questions! [/QUOTE]

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