Is the house warm enough?? Otherwise you might want to test the air in
the joint. To tighly sealed isnt a great thing either.


Mike wrote:
This summer, I upgraded my walls to R20, attic to R40, replaced metal single
windows with double low-e argon vinyl, replaced all wood doors with
insulated steel, air sealed the house and replaced a 30 year old 120k gas
furnace with a 75k condensing unit. The old furnace used to run every 5 out
of 15 mins at 0C, now it runs 10-15 mins every 3-4 hours. Something doesn't
seem right here as my neighbors runs 2-3 times per hour and it's a 100k
furnace in approx the same sized house with similar insulation (maybe 20%
less) I have my tstat set to +/- .5C and CPH disabled.