Juanse asked: "Anyone that have a honey house with floor heating can share its design/specs?" Not sure if this will help you, hope so. I don't have a heated floor honey house, but my 2500 sq ft house is heated with warm water flowing through PEX piping spaced 6 inches apart under hardwood floors. First heating for humans. There is a considerable time lag between the request for heat and the feeling of warmth. At least an hour or more. The temperature of the water flowing beneath the floor is at 90 degrees F, and theoretically the water will flow and heat the room to that temperature given that the room has well insulated walls, floor, and ceiling. For people, 64-68 degree air temperature 60 inches above the floor is very comfortable, because the floor is at about 75, warm feet fool the head into thinking the rest of you is warm. I use solar water heating with a propane 96% efficient 90,000 BTU boiler, feeding a 200 gallon storage tank for domestic hot water and heat. Second heating a honey house. Honey is a thermal sink, it takes a lot of BTUs. I f I were designing a heated honey house, all six of the interior sides would have PEX piping for heat transfer. Minimum of 4 inches of solid foam insulation per side. The PEX can have concrete poured over it for the floor. Please note, other methods of heating are far cheaper on the installation side, but radiant water heat wins hand down for efficiency. Especially if you can use solar heaters to heat the water. On an annual basis I use about 1 gallon of propane per day. The number of BTUs required to heat the facility and contents should be equal for all types of heating. The rate of temperature rise will be different. I would ask the local heating specialist to calculate the number of BTUs needed and then pick the heating system that provides that amount of BTUs and fits your budget. Good Luck Wayne *********************************************** The BEE-L mailing list is powered by L-Soft's renowned LISTSERV(R) list management software. For more information, go to: http://www.lsoft.com/LISTSERV-powered.html