New Carrier Infinity Pricing With Duct, Heat and AC
9 years ago
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Carrier Infinity With existing duct work
Comments (3)Thanks Ryan and ckmb 5150- There are so many units because of how the house is broken up. For example, There is one for the Master suite alone, Then another one for the same wing of the house but doesnt connect on the second floor. Then one for the downstairs of that wing and then one more for the other wing that is far away from the rest. Complicated I know. So I can have the static pressure tested before installing the units to see if I have an issue? What am I looking for in that test? I would assume that these are used in a switch out situation and not having to reduct a house everytime. Have either of you had sucess installing with existing flex?...See MoreCarrier A/C and Furnace Infinity Series estimate
Comments (4)1.I would want to see a load calculation in writing for each zone. I question the sizing especially on the furnaces. 2. Keep in mind basements at or even partially below grade have a very low heating and cooling load 3.assuming you have no installation issues with outside venting, I would get a price on Carrier's 58MVC high eff furnace for the main floor/basement zone. 4.as far as heat pumps, you would need an analysis of your electric and at gas rates. 5. If you have humidity issues in the basement, you need to address the issue of why before trying to solve with dehumidifiers. 6. Dealer should address your temperature issue with the master bedroom with insulation check and ductwork size check. I will assume room is the opposite in the winter heating season. Windows are high quality? 7. I always prefer new and correctly sized refrigerant linesets. IMO...See MoreCarrier Infinity Heat Pump & AC Quote in northern VA
Comments (40)12" return is almost definitely too large for the basement. I have a 6" return in my basement, and I have actually found it to draw ~200-240 cfm (using a barometer) -- plenty in my case with just a few supply outlets. In your case, I have no way of knowing for sure, but I assume it's piped directly (or near) to the inlet of the furnace blower compartment, in which case there is a lot of pressure and it's sucking in a lot of air and making the basement quite negative (not a good thing). So your basement return in that state may have been drawing close to, if not more than, half of the return air the entire system requires. Is the basement floorplan open to the rest of the home or closed off? If typically closed off, I wouldn't be surprised if the basement door had a tendency to close itself when the system was operating. I suppose putting cardboard over half of the grille is one way to reduce its intake capacity. Your older furnace does not (presumably) have a variable speed blower that will vary its RPM in order to maintain a specific CFM setting. That means that while you are noticing more airflow from the rest of the returns throughout the home, in totality your system is receiving less airflow -- no, not a good thing considering your ductwork is likely undersized to begin with. You have decreased its return capacity. To get the SAME (total) airflow from the rest of the returns throughout the home that were not previously drawing as much air generally requires the system to operate at an increased static; with older PSC type blower motors (non variable-speed), this results in decreased airflow. Hence variable speed motors are often termed "constant CFM" as they can adjust (increase) their speed to maintain a constant airflow (cfm) when subjected to as much as 0.8-1.0" of external static pressure (vs. conventional blowers max. of 0.5", which many duct systems are nowhere close to achieving despite it being the standard "design" figure). You can think of the ESP number as a measure of resistance to airflow, in a sense. The fact that you say the (supply?) ductwork is now much warmer is both concerning and telling. It is unwise for me to say much more than that as I am not there to evaluate your system design and give an accurate assessment of the ductwork design/layout, etc. But it suffices to say, with the info you've provided us, your return ductwork is now more restrictive, which would exacerbate any existing airflow issues. You do say it met the set point without tripping the high limit. Please let us know how the system performs as it gets colder out and the system runs more often in its present state. I would like to ask what made you consider replacing the systems (and proceeding to get 8 proposals) in the first place? Are there functional problems with the existing equipment (besides most likely being oversized) or other comfort issues? By now we have at least established that it is likely the existing equipment is a bit oversized and the existing ductwork is marginal -- but that is (unfortunately) exceedingly common on most residential construction. Are you after more efficiency, better comfort, both? It helps us to help you when we know more about your current system's performance. Lastly, I would not factor online reviews into your decision too much. An air conditioner or furnace is not like most appliances (such as a refrigerator) in that the installation practices and quality can make or break even the best equipment selection. There is a good chance that many (but not all) of the negative reviews you read were due to installation errors. This post was edited by ryanhughes on Fri, Nov 22, 13 at 9:51...See More$7500 for Carrier 4 Ton 2-Stage Infinity 17 SEER A/C Good Price?
Comments (17)Living in NoVA, I can tell you that those electric rates are too low. I have Dominion which should be the same as yourself. The rates are broken up into two parts: Distribution and Supply. Supply is also broken down further. They also vary for winter/summer. To see the exact rates, you would need to look at the tariff. Off of my April bill, ignoring taxes and credits, $90.96 / 769 kwH = $0.118/kwh. Yes, there is a step rate above 800kwH but I think it lowers slightly. 11 cents would be fine for a cost estimate. Oh, and I paid something around $7k for a 2.5ton single stage Trane system a few years ago. Fair amount of labor removing the old indoor system, running new electrical and refrigerant lines, etc....See More- 9 years ago
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