Consider a house in Blacksburg, Virginia. The typical annual space-heathing load for this ske of a house is 100×10 6 Bss. That is. with no insulation in the athe, we lose about too ×10 6 Bta por yeat With insulation in the attic the amount of heat lost each year will be reduced. The value of energy savings that results from adding insulation and reducing baat bse ia dopendent on what byse of residential heating furnace is instaled. Assume that an electrical resistance fumace is instaled by the builder, and its etloiency is near 100% . The cost of eloctriaty is $0 . 14 pee kWh. The cost of sovoral insulation alternatives and associated space-heating loads for this house ace given in the folowing table. Which amount of attic insuloticn is most econcerical? The life of 5 e insulaten is ostimated to be 26 yoars. Recall that 1 Btu =0.293Consider a house in Blacksburg, Virginia. The typical annual space-heathing load for this ske of a house is 100×10 6 Bss. That is. with no insulation in the athe, we lose about too ×10 6 Bta por yeat With insulation in the attic the amount of heat lost each year will be reduced. The value of energy savings that results from adding insulation and reducing baat bse ia dopendent on what byse of residential heating furnace is instaled. Assume that an electrical resistance fumace is instaled by the builder, and its etloiency is near 100% . The cost of eloctriaty is $0 . 14 pee kWh. The cost of sovoral insulation alternatives and associated space-heating loads for this house ace given in the folowing table. Which amount of attic insuloticn is most econcerical? The life of 5 e insulaten is ostimated to be 26 yoars. Recall that 1 Btu =0.293