This paper presents two projects in cold climates and examines the relationship between very energy efficient single family residential termal enclsures, comfort conditions, and simplified space conditioning systems. A project in Massachusetts allowed for the comparison of room-to-room temperatures between a single point-source, gas fired heater and a traditional, ducted, forced air, gas fired furnace in very similar houses, all built to the same construction standard. The other project, in Illinois, allowed for evaluation of room temperatures in a house with individually controlled electric resistance heaters placed in each room in conjunction with a full ducted energy recovery ventilator...

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