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I know Cropp-Metcalfe in the DC area offers this - basically they sell it in place of the Carrier 10-year extended warranty on new equipment. They might let you buy it on older equipment that's still...

Update - Carrier Mid-Atlantic still won't put this case through to someone who can actually help. They *finally* returned my contractor's calls, but didn't say anything useful, just that the humidity...

Even from an HO's perspective, Carrier Mid-Atlantic seems to be having major problems right now. I'm having a coil freezeup problem which requires Carrier tech support. They just won't return my...

First off, I do realize that a final determination can't be made while anything is abnormal about the system. However, the workaround is just putting the airflows back to where they would be with a...

I have a new Infinity system installed, and it's running great. There is an issue with the Infinity Control that requires AC Airflow set to Maximum as a workaround; until that's fixed the system...

Why is this making me think of Payson's ADJUSTABLE SUPERHEAT metering device? :D

Seriously, it was very interesting to see some hard numbers on this.

At 75 IAT, equipment actually delivers half a ton less cooling than it's designed for. Manufacturers rate at 80 IAT and applying the proper derating for a realistic indoor temperature knocks several...

This is VERY important.. the published sound ratings are objective ones, while you're probably more concerned about subjective sound. Unless this is to meet a HOA regulation, in which case the...

IMO is "in my opinion".

High velocity AC has ducts, but they're very SMALL ducts. "Ductless" AC is called a "minisplit" - no ductwork, just the refrigerant lines run between a very small outdoor...

If he really wants low maintainance, and the tenants are paying the bills.. rip the furnace out, put in electric baseboard, and add a couple single appliance circuit outlets for the tenant to plug...

First off: insulate, then caulk, then insulate some more, then get good storm windows (interior storms work great in a lot of old houses), then insulate some more.. you get the idea. The big money...

You may want to think about putting a single central fan in instead of the individual fans - no noise in the bathroom that way, and you can use an ERV as the central fan. That way with a new tight...

Thanks for posting this link - I learned a lot.

The only time I turned the system OFF during a call for cooling was when the coil was a block of ice and I wanted it to stop cooling and run fan only to melt said ice. No one is turning the system...

How about damage to condensing units? How far horizontal & vertical does the condensing furnace flue need to be from the AC condenser? (Is 1' back and 4' up from the top of the unit enough spacing?)

plain spoken - the problem I am seeing does not only occur when turning the Control OFF from Dehumidify. I observed it when turning the Control off from both High Cool and Low Cool, which I think is...

I'm familiar with the Polaris condensing water heater.. if you're not using it for radiant heating as well, the price is insane. Is there a more reasonably priced sealed combustion water heater,...

With a concentric kit sloped so that condensate runs back towards the unit per installation instructions, I don't see how condensate could be dripping out the vent pipe. Am I missing something here?

The EV1 used a heatpump for heating - as it was a pure electric vehicle, there was no engine waste heat. It was also a research project, so GM was trying lots of unusual stuff out in that car....

Sounds like a good opportunity to get a Manual D calc done and size the ductwork right. Most flex duct out there is undersized..

Turns out I'm having this problem as well, -10 control. Apparently it needs to be replaced with a -12 version control, which is pretty obviously a bugfix if it, well, fixes a bug.

See the third...

They'll be replacing the UI. Can't get one today, though, so I'm just going to watch it over the weekend. Anything else that I should watch for or precautions to take to help it maybe not ice up?...

Yep, at the end of 300.22(C):
Exception: This section shall not apply to the joist or stud
spaces of dwelling units where the wiring passes through
such spaces perpendicular to the long dimension...

I will mention it to them. This is the first time I noticed the continued runtime; before, with the incorrect sheet metal, it did appear to shut off correctly when the system was turned off at the...

Regular type NM cable (what's generally called Romex) is not plenum rated. Type AC cable (often incorrectly called BX) is allowed in plenums, however.

The main concern is the toxic fumes that the...

Spoke too soon. It iced up again today. Installers will be back tomorrow.

Same as before - came home to the system running on high stage when it shouldn't be: temperature at setpoint, outside...

You might want to email directly from your AKO email. There have been people before who've lied about being in the military to try to get around the "no DIY" rules; because of that and worries about...

I think there was a thread about X10-Infinity interference on here a few months ago, but I can't find it right off. Anyone else remember that thread?

What kind do you use, and where do you put it? In a J-box right before the cutoff switch at the furnace? Most of the products out there are intended for 3-phase, and the meterbase suppressor covers...

Thanks. That makes sense.. I realize my question was pushing it for what you can say in this area.

I think it may be time to go get a copy of Principles of Refrigeration..

The new transition is in. Not sure exactly what gauge the steel is, but it's MUCH heavier than the normal ductwork. It's immediately noticable how much better the system is operating.

I am a...

It'd probably get more traffic than some of the ones that are here now..

Seriously, another Infinity/Evolution observation. This system is VERY sensitive to proper installation. My installers made...

I take it from the discussion so far that there isn't a condensate pump significantly quieter than the Beckett? I have one of those pumps, and while it's not loud it *is* the loudest part of my...

I've wondered this myself. Got a whole-house surge suppressor installed on my meter base, so it's less of an issue.. seems that point of entry is the best you can do for protecting applicance...

Ok, I can see what's wrong with everything except #15. What's wrong with running the condensate pump outlet into the laundry sink? Around here that's common and the inspectors are fine with it - it's...

Would your inspectors accept a downdraft vent hood?

Keep in mind that a variable speed blower lets you go up to 1.0" of static pressure. That can help a LOT with marginal ductwork.

And yes, it's reasonable enough for companies to charge to do a...

Update on this thread, for anyone searching in the future.. the box between furnace and coil was WRONG and caused the coil to freeze up. They had to change it out for the correct, sloped-sides...

I pulled the original grille on this supply register to replace it, and did a double-take.. must have been beer-thirty when this one went in:
http://static.flickr.com/70/215610569_de3ebeb5b5_m.jpg
...

Keep in mind that back when your system was originally installed, it was common practice to keep a window open in the middle of the winter.. the system was probably sized to support this practice,...

Ok, I finally figured out how to do inline photos.. :D

The proper furnace-to-coil transition is on order.

Apparently the Skuttle 55UD underduct humidifier we were planning to put on the supply...

Ah. He's worried about the 90-degree elbow where the vertical drop meets that plenum box not leaving enough space for the furnace. It would be tight, but might be doable.. hopefully someone can...

I think the pass-throughs will work best as well. Is it worth putting baffles in? The only real sizing advice I've seen is Building Science's "typical size is 6x20" notation, which isn't really a...

How is the response time on those Radio Shack models? I have a cheapo Walmart model right now, and it takes several minutes for the reading to stabilize. Doesn't work very well for walking around...

The proper transition is on order, apparently a heavier gauge of metal is being used and they had to send the order out. They expect to get it in today and install it tomorrow.

I'll post a pic as...

There is no Infinity 90% furnace with a capacity of less than 40K. What are the exact dimensions of the available space? If they haven't finished building it yet, any chance they could bump one of...

Any chance you could get the static pressure in the return and supply plenums near your current unit checked? That would be a more solid basis to draw conclusions from.

It's RS-485. Not a "normal" thermostat system at all.. it has extensive self-diagnostics, basically you just plug it in and look at the screen. It'll tell you if there is anything wrong, if it's...

(whoops, wrong thread)

[Edited by perel on 08-12-2006 at 12:07 AM]

With 72 degrees inside temperature, remember to derate the equipment - that reduces the "nominal" size of your unit by about half a ton in this case. Infinity only comes in full ton sizes, and...