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Old 04-18-2012, 04:58 PM   #31
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Thermostat recomendations for hybrid Gas/electric heatpump?


The IAQ will need to have an outdoor sensor to control a dual fuel also. The prestige too, but the kit you posted about comes with one.

Your 8320 will do what you want if you add the outdoor sensor.

Goodman's communicating stat can control the furnace better then another stat can. Only Goodman's communicating stat can allow you to have control over the blower for fan on speed, and a few other blower settings that are nice to have.

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Old 04-18-2012, 05:12 PM   #32
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Thermostat recomendations for hybrid Gas/electric heatpump?


It looks like the Prestige and Prestige IAQ can use EIM or not use EIM. I don't think I need an EIM though, not sure.

There might be something wrong with my heat pump, I couldn't even get it to go on this morning in heat mode with my TH8320.
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Old 04-18-2012, 05:41 PM   #33
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Thermostat recomendations for hybrid Gas/electric heatpump?


Prestige IAQ needs the EIM.
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Old 04-19-2012, 09:51 AM   #34
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Thermostat recomendations for hybrid Gas/electric heatpump?


Wow, thanks for letting me know that! I might of made a mistake when ordering. Do you know off hand what the differences are between the IAQ and the normal Prestige? I tried to do the compare on Honeywell's site but the only difference it showed is that the IAQ has "Portable comfort control" which says it can read temps from anyroom in the house (I assume this is if you have the wireless remote, or additional T-stats or indoor sensors, I don't plan on having any of these)
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Old 04-19-2012, 01:32 PM   #35
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Thermostat recomendations for hybrid Gas/electric heatpump?


Quote:
Originally Posted by drnick5 View Post
Wow, thanks for letting me know that! I might of made a mistake when ordering. Do you know off hand what the differences are between the IAQ and the normal Prestige? I tried to do the compare on Honeywell's site but the only difference it showed is that the IAQ has "Portable comfort control" which says it can read temps from anyroom in the house (I assume this is if you have the wireless remote, or additional T-stats or indoor sensors, I don't plan on having any of these)
I just ordered the Prestige 2.0 (no IAQ) last night from Amazon with one outdoor sensor and the comfort remote controller or whatever. Chances are you don't need the IAQ or EIM. I think EIM is mainly for systems where you have other things like humidifiers, dehumidifiers, air cleaners, and stuff like that. Also, EIM supports delta T sensors, temp sensors that go on the input and output ducts from the furnace to warn early if heating or cooling isn't working. The IAQ thermostat (I think) does not have all the terminals like the normal thermostat. I think it has to be powered with 24VAC but then the rest is via 2-wire communication to the EIM.

With the non-IAQ one, you can have wireless outdoor sensors, indoor sensors, the wireless remote (which includes temp sensor inside), and the wireless internet gateway. I also had trouble figuring out the difference between the IAQ and non-IAQ but eventually I figured out that I didn't need the EIM, so that seemed to make the decision easier, since without the EIM I would have to get the non-IAQ (which supports direct connection to the HVAC system).

Here is the best source of information about the Prestige system:

http://www.forwardthinking.honeywell...ge/68-0311.pdf

It has awesome documentation on all the settings and says things like "required EIM" for features that require EIM. Detailed instructions on setting up all devices, wiring examples, and great explanations.
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Old 04-19-2012, 02:01 PM   #36
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Thermostat recomendations for hybrid Gas/electric heatpump?


thanks for the link, It gave me a TON of information... although now I think im a bit overwhelmed, haha.

I was under the impression from other posters that that you needed the Equipment Interface module for this to work in most cases. but looking at the manual, it seems its only needed if you want to add wired sensors to the ducts to onitor delta.. which I don't think is all that necessary. also seems like its needed if I wanted to control humidifying and/or dehumidifying (I don't plan on having a humidifier or dehumidifier hooked up, so I don't think I need the EIM for this either)

Also, in regards to wiring the T-stat, everything I've read said its only a 2 wire Tstat (which seems sorta nuts to me, as most are 3 wire and others need 4, correct?) but I assume that because most of the connection are made to the EIM. but if I chose to go without the EIM (so, the non IAQ version?) then I assume I'd need more wires to the Tstat? I have that wall opened up right now so im trying to figure out what wires I need to run.

In regards to power, what do I need to run to power the T-stat? does it run back to the furnace or to my electrical panel?

Also, looking at the wiring diagrams, I see TONs of configurations, but none of them match what I plan on doing (2 state forced air Gas furance with Heatpump) the closest I see is "Heatpump with Oil forced air backup" which is close... but not the exact same thing. does it matter?

Last edited by drnick5; 04-19-2012 at 02:04 PM.
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Old 04-19-2012, 03:49 PM   #37
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Thermostat recomendations for hybrid Gas/electric heatpump?


If you purchase the iaq prestige you MUST have the EIM. It requires 24v to the stat and it uses wireless to control the outputs from the EIM. The prestige (non iaq) has all connections on the stat and uses a wireless odt. This stat requires at least 6 wires to the stat (maybe more depending on your system). The iaq saves on running extra wires to the stat and instead keeps all your wiring at the indoor unit.
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Old 04-19-2012, 03:55 PM   #38
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Thermostat recomendations for hybrid Gas/electric heatpump?


thanks HVACTech, that really cleared most of it up for me.

Lastly, with the system im going to be using (dual fuel, 2 stage gas furnace and electric heatpump/AC, is there a reason I'd ever need the EIM? if not, I can just go with the prestigue correct?)

thanks again!
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Old 04-19-2012, 03:57 PM   #39
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Thermostat recomendations for hybrid Gas/electric heatpump?


Quote:
Originally Posted by drnick5 View Post
thanks for the link, It gave me a TON of information... although now I think im a bit overwhelmed, haha.

I was under the impression from other posters that that you needed the Equipment Interface module for this to work in most cases. but looking at the manual, it seems its only needed if you want to add wired sensors to the ducts to onitor delta.. which I don't think is all that necessary. also seems like its needed if I wanted to control humidifying and/or dehumidifying (I don't plan on having a humidifier or dehumidifier hooked up, so I don't think I need the EIM for this either)

Also, in regards to wiring the T-stat, everything I've read said its only a 2 wire Tstat (which seems sorta nuts to me, as most are 3 wire and others need 4, correct?) but I assume that because most of the connection are made to the EIM. but if I chose to go without the EIM (so, the non IAQ version?) then I assume I'd need more wires to the Tstat? I have that wall opened up right now so im trying to figure out what wires I need to run.

In regards to power, what do I need to run to power the T-stat? does it run back to the furnace or to my electrical panel?

Also, looking at the wiring diagrams, I see TONs of configurations, but none of them match what I plan on doing (2 state forced air Gas furance with Heatpump) the closest I see is "Heatpump with Oil forced air backup" which is close... but not the exact same thing. does it matter?
With the standard prestige 2.0 you will need 7 wires to control your planned system.
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Old 04-19-2012, 04:00 PM   #40
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Thermostat recomendations for hybrid Gas/electric heatpump?


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Originally Posted by drnick5 View Post
thanks HVACTech, that really cleared most of it up for me.

Lastly, with the system im going to be using (dual fuel, 2 stage gas furnace and electric heatpump/AC, is there a reason I'd ever need the EIM? if not, I can just go with the prestigue correct?)

thanks again!

I would prefer the iaq simply to cut down on the number wires in the wall and to be able to control a humidifier or other accessories should you decide to add them on later.
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Old 04-19-2012, 04:14 PM   #41
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Thermostat recomendations for hybrid Gas/electric heatpump?


I was sort of thinking the same thing... at least with the IAQ I'd have the OPTION to add something later on. it doesn't seem like the price is that much different. I've found the whole IAQ system for approx $400 with wireless outdoor sensor and internet gateway. Do you know if any of these come with the thermostat cable, or do I need to buy that separately?
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Old 04-19-2012, 04:18 PM   #42
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Thermostat recomendations for hybrid Gas/electric heatpump?


Quote:
Originally Posted by drnick5 View Post
thanks HVACTech, that really cleared most of it up for me.

Lastly, with the system im going to be using (dual fuel, 2 stage gas furnace and electric heatpump/AC, is there a reason I'd ever need the EIM? if not, I can just go with the prestigue correct?)

thanks again!
My preference is no EIM. IAQ thermostat + EIM is more complicated than the standard prestige setup, no doubt about it. How much more complex, I can't really say exactly because I've never installed both myself before.

Using the standard Prestige, you just run one bundle really, a thermostat insulated bundle of wires of the correct gauge. And if you get the standard Prestige, you can always add on an EIM later if you need to. For me, the choice was made a bit easier because I already have a bundle with a bunch of wires going to my existing TH8320 thermostat. To replace my thermostat all I have to do is but a new one on the wall. To add an EIM I'd probably use the existing wire run to go from the EIM to the thermostat; that would mean disconnecting all the connections to my furnace and heat pump cable run, then wire up the furnace/heat pump to the EIM. Pain in the butt.

I'm not a professional in this industry though, so keep that in mind, although I did read up on them both, and seemed like the EIM/IAQ was something I didn't need for my relatively simple heat pump + gas furnace setup.
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Old 04-19-2012, 04:33 PM   #43
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Thermostat recomendations for hybrid Gas/electric heatpump?


Thanks DJGrant,

I'll have the same setup (gas furnace with electric heatpump) any complaints about going with the Prestige? was it easy to wire and setup?
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Old 04-19-2012, 04:40 PM   #44
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Thermostat recomendations for hybrid Gas/electric heatpump?


Quote:
Originally Posted by djgrant View Post
I just ordered the Prestige 2.0 (no IAQ) last night from Amazon with one outdoor sensor and the comfort remote controller or whatever. Chances are you don't need the IAQ or EIM. I think EIM is mainly for systems where you have other things like humidifiers, dehumidifiers, air cleaners, and stuff like that. Also, EIM supports delta T sensors, temp sensors that go on the input and output ducts from the furnace to warn early if heating or cooling isn't working. The IAQ thermostat (I think) does not have all the terminals like the normal thermostat. I think it has to be powered with 24VAC but then the rest is via 2-wire communication to the EIM.

With the non-IAQ one, you can have wireless outdoor sensors, indoor sensors, the wireless remote (which includes temp sensor inside), and the wireless internet gateway. I also had trouble figuring out the difference between the IAQ and non-IAQ but eventually I figured out that I didn't need the EIM, so that seemed to make the decision easier, since without the EIM I would have to get the non-IAQ (which supports direct connection to the HVAC system).

Here is the best source of information about the Prestige system:

http://www.forwardthinking.honeywell...ge/68-0311.pdf

It has awesome documentation on all the settings and says things like "required EIM" for features that require EIM. Detailed instructions on setting up all devices, wiring examples, and great explanations.
The first link you posted, shows the EIM as part of the kit. So that kit comes with the EIM.

In order to use it as a 2 wire stat, you need the EIM.
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Old 04-19-2012, 04:45 PM   #45
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Thermostat recomendations for hybrid Gas/electric heatpump?


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Originally Posted by drnick5 View Post
Thanks DJGrant,

I'll have the same setup (gas furnace with electric heatpump) any complaints about going with the Prestige? was it easy to wire and setup?
One of the many nice things about stats that use an EIM. You have no clicking noise from the thermostat.

next, when using a wired outdoor sensor. You only need to run the wire to the EIM, which is usually installed near the furnace/air handler, so no fishing a wire up to your thermostat.

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