On Sun, 18 Oct 2009 18:54:36 -0600, "Jim" nospam@wherever wrote:

Hello,

I have a 2600 sq ft 4 level split home in Canada. It was built in
1985. This past spring we replaced our very non-effecient furnace with a
Tempstar 95% effecient gas furnace. It really is wonderful as the old
furnace would cause the house to feel sort of drafty and basement was always
cold etc... Now I have this furnace that I love to bits BUT now since it has
gotten colder outside these past two weeks, we have kept the doors and
windows closed and now have a high humidity problem inside the home IE:
fogged up windows (triple pane)...air basically feels clammy...bought a
humidistat and the house is sitting at around 50% humidity....

What did you change in addition to the furnace? Windows? insulation?
Did the furnace come with a humidifier?

The last would be my guess-- and it should have both an adjustment and
an outside sensor.

What does the installer say?

Jim