On of our high-efficiency furnaces has its condensate pipe draining
directly to a patch of dirt in the far corner of our crawl space (the
rest of the crawl space floor is covered in black plastic).
The furnace itself is small (it heats only the kitchen and a guest
room above it) and the condensate which drips out slowly seems to get
absorbed immediately into the ground -- there is no pooling and only
maybe a 12inch diameter area of moist soil. There are no wood columns
near any of the moist dirt.
Is it ok to leave the situation this way or should I extend the pipe
back from the far end of the crawl space to the regular basement where
I can then drain it into a proper drain?
The reason I ask is that the crawl space is tight so it would be a
PITA to run properly sloped rigid pipe there. Also, the current
drainage area is about 40 feet from the actual basement opening so I'm
afraid that it might be a bit far for a standard condensate pump.
Could one even argue that in the winter (which is when the furnace
runs), it is not even that bad to have a little moisture in the crawl
space/basement since the air is so dry then anyway (vs. the summer
when the basement and crawl space require a dehumidifier).
Note that the other 2 (larger) furnaces in the home are located in the
basement proper and are properly drained by a condensate pump.