Tight home — help with indoor humidity
Some basic background: Finishing the new home build. Zone 6 (Iowa). Currently hot, humid days. About 90-95 outside with 80%+ humidity levels.
House is 3800 sqft, (half main level, rest is basement, fully ducted and conditioned however) r28 full ICF with R60 blown attic with spray foam attic seal, triple pane windows. Heating is through a ducted furnace (Lennox SLP98) and an XP16 air conditioner. HRV for the home.
The house was sized for a 2 ton ac. It is not having any issues keeping up. I have been keeping it at 73 to test things out. When it has longer run times it keeps the indoor humidity at about 42-48%. When it shuts off, the house holds 73 for several hours typically. However the humidity can climb to mid 50s, pushing 60. I have the HRV shut off as I do not want to dump additional humidity in the room.
I have been playing with the function of the stat changing between continuous circulation vs automatic. The problem is it still doesn’t kick on the ac unless it calls for cooling.
Anyone have any ideas how to keep the humidity in check without adding additional equipment?
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