That's a fair assessment. While I probably overstated it a little, my point was just that the way people talk sometimes, you'd think that it's a miracle that a Goodman ever works, and that Tranes...
Type: Posts; User: wyounger
That's a fair assessment. While I probably overstated it a little, my point was just that the way people talk sometimes, you'd think that it's a miracle that a Goodman ever works, and that Tranes...
What part of the country are we talking about?
Sounds pretty normal for a system in Florida, unless a real cold snap comes through.
It varies from house to house. We can't really tell you what the number will be. Typically it's between 25 and 40, but there are some exceptional cases.
There's no harm in bumping it down a few...
My best answer is to put a fresh air intake in the laundry room and close the door when the dryer is running. It won't be very conditioned in the laundry room during those times, but that's a pretty...
When you say it comes in just under 5 tons, is that from Manual J alone or did you also do Manual S for equipment selection? Manual J alone doesn't tell you what size equipment you need, it tells you...
From what I've seen there's not a great deal of difference in restriction from one media filter brand to another. The main thing to make sure of is that you're giving it enough filter area to keep...
This is a more apples-to-apples comparison than we usually get to make!
I like the spine fin design on Trane's outdoor coil and their choice of a defrost control that only defrosts when it...
Four and five ton systems have to move a lot of air to work properly. It's just the nature of them; they're the biggest equipment sizes used in residential, and the airflow they need is proportional...
Propane will eat you alive, though, trying to heat that much space in a cold climate. If you're going to have it around for a stove and/or fireplace, fine. But the cost of heating a place like that...
Sounds like with the EMR feature on they intend you to set up times and temperatures that are arrival times, not departure times.
Earlier programmable thermostats were just glorified timers with...
Bypass humidifiers are often constrained by the running time of the furnace, since they are basically only effective when hot air is flowing through the ducts. Modulating furnaces run at low fire...
The AC system did spring a leak a little early, but 14 years is not an unusually short life for this kind of system. And yeah, you only had one repair on the furnace. And I'm not sure why you would...
Yup. There's probably an upper limit on how many degrees beyond your cooling setpoint it will go, but that's the basic idea.
I love my Infinity, but must agree. That sounds like too much cooling for a well-insulated 2200 sq ft house, even in Dallas. And the furnace even more so.
Infinity is good equipment, and...
If it's too humid inside, the VisionPro will run the AC more than is required to get to your temperature setpoint ("overcooling").
It's better than nothing, but it's not exactly elaborate.
Variable speed blowers can help if you leave them in the fan on mode- same as with regular ones, but you can usually select a lower speed and have it take less juice to keep the blower going. But...
Sorry. The OP wants to know what sort of furnace and AC to buy, what efficiency suits their house, but we don't know if they are in Minneapolis or Miami. We need to know where they are to know what...
Location... climate... utility rates? The characteristics of the house matter but there is no one size fits all solution that works everywhere in the country.
A 25 degree differential is probably well in excess of the correct design conditions for your area. Outdoor summer design temp here in Atlanta is 94, and probably a little lower for any location in...
Well, it's good that they used Manual J. That's the system we look for. It still sounds like a lot- so I'd agree with the questions on the windows. I'd also wonder what design temperatures they used....
Why a furnace at all upstairs? You're not going to use much backup on a second floor at all, and you can get more out of a heat pump by pairing it with electric backup. The reason being is that with...
I must have goofed my previous calculations. If I plug in an imaginary big (six ton) heat pump with COP the same as my current one and three times the output at each rating point (since mine is two...
The aux heat (furnace in this case) will come on every time the heat pump goes into a defrost cycle, regardless of outside temperature. During that time, it will show the indicator light on the...
Following the design specs to the letter means selecting the next-size-up furnace; in other words no more excess capacity than what comes from one step to the next, with no fudge factor. So with a...
Goodman specs typically show double the filter area for disposable filters as for "permanent" filters. The only permanent filter I know of has a hard time even catching hair, though, so it's not very...
If they are both running on the 1500 watt setting at the same time on the same cord, it should pop the circuit breaker or fuse immediately. If not, the extension cord will overheat and catch fire...
Typically auxiliary/emergency heat comes on in two or three stages on a sequencer (a fancy time delay relay). You may find that it's lukewarm for a few minutes, then warm for a few minutes, and if...
Did the contractors who did the Manual J know about the insulation going in?
154k input * 80% = 123k out (and this is too big, you say)
Potential choice:
100k input * 94% = 94k out.
This is...
How much heat you can hold in with a window treatment depends on the window treatment. Curtains work better than blinds. If you don't think curtains can act as insulators, you haven't been to a house...
It might have been defrosting- it does intentionally stop the outdoor fan then (but keeps the compressor and indoor fan going). The defrost cycle should never last for more than about 10 minutes,...
None at all? I thought I remembered us having a regular based out of Ontario (California) or thereabouts.
It's loose in the sense of having old single-pane windows. I also have a hunch that the oldest of the exterior walls may be uninsulated. It's been added on to so many times over the years that you...
Ah. In that case, the other possibility that comes to mind is that it takes a few days to learn how to best run your particular combination of house and furnace. It must be the modulating flavor of...
Note that the OP mentions that this is a second-floor system.
In Atlanta, most second-floor systems need more cooling capacity than heating capacity. Essentially all forced air furnaces can move...
Don't blame the furnace, blame the control system :)
Modulating furnaces work best with modulating thermostats! Sounds like as configured your "modulating" furnace is having to act as a 2 (or...
Anticipation is used to compensate for how some systems deliver heat with a lag factor. This isn't usually a big problem with forced air systems, unless they are severely oversized, but can be an...
Nice PDF, beenthere. Makes a good reference, at least when you're targeting 300 fpm.
I agree that there could be lots of other problems, but clearly one is the return; the filters need to be...
Airflow isn't the only question here.
Even with a modulating furnace, having lots of excess capacity is not a good thing. They can only modulate down to 40% of their rated *burner* capacity; below...
Even at peak rates the heat pump's heat is probably reasonably economical. But you wouldn't want to run the strips along with the heat pump during peak time.
Your installer can probably put the...
I'm on the hunt for somebody to improve the cooling efficiency of an existing 5 ton residential system in San Bernardino, CA- primarily to improve airflow to a level that suits a desert application...
The Patient:
Mom's house in San Bernardino, CA
Old, loose house, hot-dry climate
Four year old gas-electric HVAC. Condenser is a Goodman CLT60. Furnace is horizontal, attic, 80%, and was done at...
My BS detector is beeping quite loudly. The sad part is that they may actually believe what they're saying. A little common sense makes it clear that the furnace control board can't do the best job...
The Rheem/Ruud modulating furnace is fully modulating. You have to use a special thermostat with it, though. If you use something simple, then it does act as a three-stage.
The York unit is new...
It's easy to calculate the economic balance point here in Atlanta.
You take our electric rates, the efficiency of heat pumps in this climate, and the cost of natural gas, and oops... I don't have...
If I were starting from scratch in Seattle, I would use an all-electric heat pump and not bother with the gas. Heat pumps don't need a great deal of backup heat in mild climates like yours, and your...
OK, I am arriving to this party way late... busy lately, sorry.
I did want to chime in with one detail that seemed to get forgotten in the operating cost calculations.
You said your propane was...
I suggest (and this is essentially what I have myself) the Evolution two-stage variable furnace and Evolution control with not-necessarily the fanciest Evolution-type heat pump. You can use nice (but...
I'm not familiar with how the 1277 handles dual fuel yet, but here's what I'll say in general.
Actual balance point varies depending on the heat loss of the house, the capacity of the equipment,...
A house that needs FOUR central air systems?
With that many systems you may want to consider a single smallish chiller instead of four separate units. While those were traditionally only for...
You're on the right track by using a heat pump as your primary heat source. A load calculation is the right way to know what size equipment to get; short of that, if the old equipment did OK, you...