Can I drain my furnace’s condensate line into the sealed sump pit?
– Radon remediation system in place in the basement (usual sub-slab depressurization).
– Sump pit covered with plexiglass and sealed.
– Basement slab perimeter has drainage channel that wasn’t filled in by the radon folks (I gather not optimal).
– We are planning to replace the 80% efficient furnace in our unconditioned attic with a high efficiency unit since we are planning to condition the attic using a “flash and batt” approach.
– Condensate line for our current furnace and A/C unit terminates in the basement in that perimeter channel and drains there. In theory, that would drain into the sump pit via the underground perforated pipe that terminates in the sump pit (in practice I’ve never seen any water in the sump pit and the pump has never gone off to my knowledge).
Q1. The new high efficiency furnace will generate much more condensation. Should I continue to have it drain into that perimeter channel or is it better to seal the channel to improve radon remediation and drain the condensate into the sump pit?
Q2. If the area under the slab and presumably the sealed sump pit are under neg pressure, does that pose a problem if trying to terminate the condensate line there, ie is it bad to pull on the condensate with that pressure, or is it too small? The “manometer” measuring the radon pump seems to read only an inch or so of water.
Q3. If ok to drain the condensate line into the sump, are there covers that are made for this?