Not to derail, but Are you in college station area?

Yes.

Fresh air intake on one side. But not pulling it through a dehum

What would an acceptable indoor humidity range be?

Personally I like my humidity to be less than 60%. 50% is my sweet spot but in the summer it can get down to 48% and I can leave it at 78 and be dang near cold.

You think below 50% without dehumidifier is realistic with 2 stage/variable speed equipment?

El_duderino said:

---

You think below 50% without dehumidifier is realistic with 2 stage/variable speed equipment?

---

I have zero reason to believe otherwise, but it's going to depend on a lot of variables. My two stage/VS equipment has done it on two houses so far. BUT…It's primarily in the summer though when there is adequate heat load to allow the system to ramp down AND not over cool. If it's 70 degrees outside, this is going to be a tough task unless you like your house at 68 degrees.

That's what I figured. Trying to get my system tuned to accomplish that and making sure I wasn't trying to do the impossible

El_duderino said:

---

That's what I figured. Trying to get my system tuned to accomplish that and making sure I wasn't trying to do the impossible

---

I had a slightly undersized unit upstairs at my other house and it kept things dry as all hell because it continuously ran. But it also was right at the break even point on a 98 degree day so if you wanted the temp at 75 you better set it there when it's cool
Because it wasn't going to bring it down from 80. But again, it was dry as hell lol

I'll take dry and a couple degrees warmer vs humid and lower temp

I had the exact same "problem" with my echobee upstairs. I kept getting humidity alerts. I smoke cigars every now and then and I have multiple humidity monitors that I keep in a few different humidors. I decided to put them all upstairs and all of them were around 15%-20% LOWER than what my echo bee was alerting. I went ahead and replaced my echo bee with a new honeywell digital thermostat and that also was giving me about 15% lower humidity readings that my echo bee. Apparently this is known issue from what I've been able to find on the net.

RoyVal said:

---

I had the exact same "problem" with my echobee upstairs. I kept getting humidity alerts. I smoke cigars every now and then and I have multiple humidity monitors that I keep in a few different humidors. I decided to put them all upstairs and all of them were around 15%-20% LOWER than what my echo bee was alerting. I went ahead and replaced my echo bee with a new honeywell digital thermostat and that also was giving me about 15% lower humidity readings that my echo bee. Apparently this is known issue from what I've been able to find on the net.

---

I've had the same issue with mine. You can adjust the humidity and temp offsets in the Ecobee menus. I also had to stuff the wall opening with rockwool to try and level out the temp changes of hot/cold air coming up the wall cavity and affecting the reading. Not sure why Ecobee puts the temp sensor on the back of the unit vs the front that faces the living spaces

2-cents here
Our history of high humidity in house was when we had
1) too many tons for the LivSF
2) the drain pan held water, drained sloooowly
3) some minor fenestration air infiltration
4) single stage HVAC
5) duct leaks