I have a 2 story 4 bedroom home built in '72 (VA), vinyl siding. I have the heat set to 77 degrees, the temp on my thermostat reads 77 degrees and I purchased a cheap thermometer which reads the same thing upstairs and down however the house is still cool to the point my family walks around in sweaters. The master bedroom temp reads 74 degrees (wife really hates this). I have added insulation in the attic and new windows. The home is all electric. I'm not sure what could be causing the chill and I hate to turn the heat up to 79 degrees. Any advice is much appreciated. Thanks in advance.