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We've been very happy with our 8T. We're going with a second system for my mom's house but using the correct Aspen coil and furnace combo was one of the very few ways to meet the EER number to...

One other thing to take into account is a base price for gas. This varies by utility company but ours recently increased the base monthly charge and lowered the price per therm. Our only other gas...

With the York 8T heat pump the stock coils easily meet the energy credit specs for HSPF and SEER. However the EER requirement is 12.5 and the best combination with a factory York coil is 12.3 (that's...

We had the IAQ tstat installed. For our area it's a waste. That's one thing I like about the contractor that bid the system on my mom's house. We run the AC about 3 weeks a year in the pacific...

Yep, that's the situation here. No $1500 credit no sale. We need to get all the rebates and credits possible to make this pencil out. If the Aspen is a good quality coil I don't really care if the...

But even the top end 4 and 5 ton 2 stage residential units don't show the same efficiency numbers as some of the lower end single stage units made by the same company. I would expect that on the fans...

Good to hear about Aspen quality. My contractor is looking into Mix-n-Match with a York HP to make the required numbers on a 4 ton unit of the federal tax credit. I know there's a debate over whether...

GoGophers,
What size (ton) heat pump are you looking at putting in?

Mmm, that is even more pause for relief. We have a rental property on the same plot of land. This would mean that we can't apply any rebate associated with that to our residence. Actually sort of...

This is from the ARI website. It answers the question about being able to claim a $1500 credit for a furnace and then again for a HP or AC. The answer is no, er' ah, probably not. You can only claim...

Yep, I've been through this before. While I'm confident in the companies HVAC ability I don't expect them to be tax lawyers. If we get this worked out maybe I should ask for a commission on the extra...

That's great news. Waiting for our HVAC contractor to hear back from the local York rep. Then we'll have to confirm that the thing actually fit's in the space we have available but it sounds like a...

It's pretty darned hard to know. You've got to be a tax accountant, a lobbiest and an HVAC professional. Psychic would help too. Is it by tax year? Say for instance you replace an 80% gas furnace...

Yes, the government specs do create an artificial incentive which probably doesn't make sense otherwise. Sometimes that's what's needed though to simulate a breakthrough. Just from a sales standpoint...

What size? Do you have the AHRI certificate number. If you're over 3 ton I'd be very surprised to see the 5T make the requirements for the current $1500 stimulus. I'm not sure on this but I think...

So I guess the answer is if you're going to the expense of putting in a water based heat exchanger then why bother with the air source heat exchanger?

If I'm thinking this through correctly, in...

It's not really a problem I guess. That's what we have and it works great. I guess it's sort of an artificial problem created by the government specs for the tax credit. The difference in efficiency...

Why bother with the 98% furnace when you've got a HP. Look hard at how much of the heat it will actually supply (hopefully very little) and figure out how long the payback will be vs an 80%. A couple...

No, that would be too expensive. I was thinking that if the heat exchanger was separate from the air mover you wouldn't be duplicating the fan and control logic. All you'd be adding is a large damper...

It would be almost a miracle if all the stats were the same for you're exact equipment combination. Just because the advertising brochure claims 18 SEER it rarely works out that that's what you...

Looking at the numbers for a heat pump with gas furnace I'm wondering if there are any furnace designs that allow the airflow to be split to either the coil or the heat exchanger. The constriction of...

We've had the same experience. Both with the system we installed on our house last fall (York vs Trane from same company) and just now with York vs AS for my mom's house. If it's one of the high end...

Had a quote done today for my mom's house. Seemed very knowledgeable. Went over the load calcs after touring/measuring the house. Talked over some of the alternatives (i.e. furnace/AC vs HP,...

Or just leave it in the oven (turned off) at 160F for a few hours. If it dries out and doesn't work, warranty. "I don't know, it just suddenly stopped working," angel22

When we were getting quotes for replacing our old oil burner with a HP and gas we had the heating oil company we'd been using give us a quote. I guess it shouldn't be a surprise they were...

With our system we had a year to make up our mind on the extended service. They probably don't volunteer that information. I decided to wait and see how the company performed before making a decision...

I pulled up the numbers from our ARI certificate. It's for a 4 ton (I think I might have said 5 earlier) York Affinity 8T heat pump:

Cooling capacity 46500
EER 11.90
SEER 16.4
Heating Capacity...

Especially if you get a 2-stage HP ;)

On heating the air speed over the coils needs to be much slower than it does with a furnace because the temperature of the coils is no where near as hot as...

You don't see much 22 degree weather in Florida. My heat pump did great last year carrying all the heating load down to 20 degrees. Below freezing I don't think I saw it go into defrost once. The RH...

Do you have both manuals for the IAQ? The owners manual is next to useless but I thought the installation manual fairly well documented the settings and operation. It's really not designed to be a...

Well your price numbers are likely to be edited out pretty quick since it's against the policy of this site. Anyway, a lot of money for just cooling and not having that designed in originally seems...

Ah, forgot or didn't comprehend you have no ducting. You are looking at extensive cost in ducting AC supply and return lines or going to one of the ductless/mini split systems. Not knowing the...

Wait a minute. This whole thing had no cooling in the design originally? Mmmm. It sounds like a large and very complex system. Heat pump technology has always been good but it's really excelled in...

How much per Kilowatt hour? You may be surprised at how efficient a HP really is. I'm in the Seattle area. We went from an old very inefficient oil burner that cost (yearly averaged) ~$300 a month...

Perfect for removal of old dead units. :D

Cold storage :D

With the York, and probably most high end units that meet the spec it's a 2 stage compressor so during marginal times (not baking hot) the unit will run on first stage saving you money and possibly...

DrCindy,
PM me if you'd like the scoop on some of the contractors we dealt with when selecting our HP. I'm on the eastside (Bellevue).

Teddy_Bear alluded to it. Forget about dehumidifying with...

Not sure what you're suggesting. Introduce ammonia vapor to the system? An ammonia water solution would indeed have a lower boiling point (one of the few things that does) but even with a high...

York 8T comes in 3 ton two stage unit that rates up to 18 SEER 14 EER if you can get by with that. Unfortunately it looks like best case the 4 ton unit just misses on the EER number.

That's it. I guess theoretically the addition of water vapor to the mix increases the pressure (more gas molecules in the same enclosed volume) but I suspect in real life that doesn't have much...

That is correct, as long as there is no chemical interaction all gases will reach a state of equilibrium. That is to say there is no stratifcation base on weight of the gas. If you have a bottle...

What size breakers do you have in place currently? Is the existing wiring rated for the increased amperage? Breakers are not a case where bigger is better. I'd follow the recommendation of an...

Aren't they over every ones head? :D

Sorry, couldn't resist.

To answer the original question, no water does not bond to nitrogen.

There's really no magic or complex explanation required. The most effective way to turn liquid water into vapor is by pulling a...

At any given temperature and pressure the number of gas molecules per liter is the same irregardless of the composition of the gas. At standard temperature and pressure that number is called a Mole....

Thanks, that's good to know. Pretty much in line with what we've experienced; can comfortably bump the temperature up two degrees when running the fans. We do leave them running even when unoccupied...

Well, that made me curious. A bit more digging and turns out they charged double list for the part and then generously took 10% off. :mad:

Well, when she has the folks out to quote a HP we can...

Power is rock solid. When my folks built the house they ran 12 AWG copper wiring everywhere instead of 14 AWG. The crawl is bone dry. Never a hint of condensation down there. Never had any problems...

Oops, yes Quigley, not Wiggly. My bad :o

You can order through them and you'll get the full factory warranty but it's far more expensive than if Ford and GM did it in house and it seems like there...