civic13
(Post Master)
06/07/17 09:22 AM
ecobee 3 T-stat

Lowes is having a promo where you get 2 room sensors free when you buy one of the t-stats. Is that a good deal?

My house is two stories and of course the upper floor is either hot in summer or cold in fall/winter. Would this help at all?


If I tell it to monitor the upper floor temp wouldn't the other rooms eith be too cold/hot?

https://www.lowes.ca/promo/Promo-Ecobee/...5&et_cid=182269


SW20_MR2
(Post Master Sr)
06/07/17 09:30 AM
Re: ecobee 3 T-stat

Your assumptions are correct. The lower floor will be colder in the summer. I can live with it though cause at least I'm comfortable when I'm sleeping.

LNXGUY
(Post Master Supreme)
06/07/17 09:46 AM
Re: ecobee 3 T-stat

Problem with the sensors is that without dampers in the vents for the thermostat to control all you're really doing is blasting the AC until the bedroom is cool enough. Downstairs will be way colder. I guess if you're ok with that then the ecobee will do just fine.

Hatorade
(Post Master Supreme)
06/07/17 09:53 AM
Re: ecobee 3 T-stat

 Originally Posted By: LNXGUY
Problem with the sensors is that without dampers in the vents for the thermostat to control all you're really doing is blasting the AC until the bedroom is cool enough. Downstairs will be way colder. I guess if you're ok with that then the ecobee will do just fine.


Can't you just close the dampers on the lower floors to force the air to the higher floors? I have 3 floors plus basement and closed off all vents in basement, half the vents on the main floor and left the rest of the floors open (2nd floor is open to 3rd floor) and my place feels pretty even during winter and summer. I think it's mostly due to the open concept of the upper floors though.


LNXGUY
(Post Master Supreme)
06/07/17 10:25 AM
Re: ecobee 3 T-stat

Yeah alot of people do that. Gotta be careful that you're not closing to much stuff and making your furnace/AC work harder. I usually close the downstairs air returns in the summer as well. But who the fuck knows if all that shit actually makes a difference lol

porschetr
(Post Master Supreme)
06/07/17 10:28 AM
Re: ecobee 3 T-stat

You can also tell it to average between the sensor and where the actual thermostat is.


I also got it when they were giving 1 extra sensor.
Each sensor went in a room, and they average.
When rooms at 22.5, the hallway is 21 - 21.5

One of the rooms could go up to 26-27 when I set the old thermo at 22.5 at the hallway, so the sensors are great.


Closing/opening the vents can work one night, but may not next week..I guess depends on weather, house air flow....


SW20_MR2
(Post Master Sr)
06/07/17 10:41 AM
Re: ecobee 3 T-stat

I will close some of the downstairs vents, but there is still a difference in temps. Generally 2 degrees in my house.

Just A Troll
(Post Master)
06/07/17 10:56 AM
Re: ecobee 3 T-stat

For us folks with Nest we can get these "smart vents" that "work with nest". That can help with the lower floor getting too cold.

Try to find something similar for ecobee.


xza8
(Sr Member)
06/07/17 12:18 PM
Re: ecobee 3 T-stat

Fully closed in basement
Half open on ground
Full open on upper + bathroom vents on upper to "vent" the hot air out

But don't restrict too much or your HVAC will freeze up

I'm no HVAC guy but how come homes don't have upper return and lower returns?

E.g. in summer, the upper returns on 2nd floor should be open to allow the HVAC to suck the heat and in the winter, the lower returns on 2nd floor should be open to allow the HVAC to suck the cold.


porschetr
(Post Master Supreme)
06/07/17 01:14 PM
Re: ecobee 3 T-stat

We have both up and down.

loudsubz
(Post Master Supreme)
06/07/17 01:16 PM
Re: ecobee 3 T-stat

Try playing around with blocking the main floor return. You want the majority of intake coming from the second floor where the temp is hotter. Also if your home has an upper and lower return close the bottom and allow the upper to suck.

LNXGUY
(Post Master Supreme)
06/07/17 04:24 PM
Re: ecobee 3 T-stat

 Originally Posted By: xza8
Fully closed in basement
Half open on ground
Full open on upper + bathroom vents on upper to "vent" the hot air out

But don't restrict too much or your HVAC will freeze up

I'm no HVAC guy but how come homes don't have upper return and lower returns?

E.g. in summer, the upper returns on 2nd floor should be open to allow the HVAC to suck the heat and in the winter, the lower returns on 2nd floor should be open to allow the HVAC to suck the cold.


You don't have returns on both levels of your house? Cause you should, lol.


loudsubz
(Post Master Supreme)
06/07/17 05:13 PM
Re: ecobee 3 T-stat

 Originally Posted By: LNXGUY
 Originally Posted By: xza8
Fully closed in basement
Half open on ground
Full open on upper + bathroom vents on upper to "vent" the hot air out

But don't restrict too much or your HVAC will freeze up

I'm no HVAC guy but how come homes don't have upper return and lower returns?

E.g. in summer, the upper returns on 2nd floor should be open to allow the HVAC to suck the heat and in the winter, the lower returns on 2nd floor should be open to allow the HVAC to suck the cold.


You don't have returns on both levels of your house? Cause you should, lol.


I think he's referring to 2 returns in the same room



Risky Business
(Post Master Supreme)
06/07/17 10:13 PM
Re: ecobee 3 T-stat

 Originally Posted By: loudsubz
Try playing around with blocking the main floor return. You want the majority of intake coming from the second floor where the temp is hotter. Also if your home has an upper and lower return close the bottom and allow the upper to suck.


This part I am not so sure about.

Humidity is usually highest on the lowest floor, so while the top floor is the warmest, it's the least humid, with the basement the coolest and most humid. My understanding is you want to circulate humid air through your HVAC system to reduce humidity which affects how hot it feels, mold growth, etc.

I don't think moving warm air (top floors) has the same effect and I also don't think it's a good idea to close off the basement vents especially if it's a finished basement. If it's unfinished then it doesn't really matter, but mold should still be a concern. Just a thought anyway.


Risky Business
(Post Master Supreme)
06/07/17 10:20 PM
Re: ecobee 3 T-stat

Basically closing off any vents or returns 100% isn't recommended, the goal is to 'balance' the system with so it's not 0% or 100% (off vs. on), but somewhere in the middle you still need to allow air circulation through the home.

xza8
(Sr Member)
06/07/17 11:08 PM
Re: ecobee 3 T-stat

 Originally Posted By: Risky Business
Basically closing off any vents or returns 100% isn't recommended, the goal is to 'balance' the system with so it's not 0% or 100% (off vs. on), but somewhere in the middle you still need to allow air circulation through the home.


"Closing" the basement vents still have air blasting through the closed grates


Wildout
(Post Master Jr)
06/08/17 02:21 AM
Re: ecobee 3 T-stat

 Originally Posted By: Risky Business
 Originally Posted By: loudsubz
Try playing around with blocking the main floor return. You want the majority of intake coming from the second floor where the temp is hotter. Also if your home has an upper and lower return close the bottom and allow the upper to suck.


This part I am not so sure about.

Humidity is usually highest on the lowest floor, so while the top floor is the warmest, it's the least humid, with the basement the coolest and most humid. My understanding is you want to circulate humid air through your HVAC system to reduce humidity which affects how hot it feels, mold growth, etc.

I don't think moving warm air (top floors) has the same effect and I also don't think it's a good idea to close off the basement vents especially if it's a finished basement. If it's unfinished then it doesn't really matter, but mold should still be a concern. Just a thought anyway.


Depends on the layout of the home. In the summer my house is the most humid & warmest on the upper floor. In summer I close the vents on the main floor & basement.

Still about a 2 degree difference depending on if the blinds are open/closed etc.


Risky Business
(Post Master Supreme)
06/08/17 10:57 AM
Re: ecobee 3 T-stat

 Originally Posted By: Wildout

Depends on the layout of the home. In the summer my house is the most humid & warmest on the upper floor.


Layout shouldn't make a difference.

Did you measure humidity between all three floors at the exact same time or was it at different times making this a moot point? What was the humidity difference between all three floors?

I should add that my 'facts' are based on a bungalow layout, basement most humid, 1st floor is mid, and attic least humid. When you take the readings (summer vs winter) will also make a difference so obviously my experience may not apply to a 2 story home and anyone that wants to compare needs to cite how/when they took their measurements.


Risky Business
(Post Master Supreme)
06/08/17 10:59 AM
Re: ecobee 3 T-stat

 Originally Posted By: xza8
 Originally Posted By: Risky Business
Basically closing off any vents or returns 100% isn't recommended, the goal is to 'balance' the system with so it's not 0% or 100% (off vs. on), but somewhere in the middle you still need to allow air circulation through the home.


"Closing" the basement vents still have air blasting through the closed grates


Then you have other problems.


87ZCSi
(Post Master Sr)
06/09/17 09:03 AM
Re: ecobee 3 T-stat

Couldn't a multi speed fan on low 100% fix this for the most part?