Can a Carrier performance furnace and Infinity AC work together?
D .
5 years ago
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tigerdunes
5 years agokevinande
5 years agoRelated Discussions
Installing a Carrier Infinity gas furnace/ac system
Comments (3)miz 3406121 Active Systems INFINITY 21 PURON AC CARRIER AIR CONDITIONING 24ANA136A31 CNPV*4221A**+UI 58MV(B,C)100-20 37000 13.80 18.50 1 pricing is very good. top of line residential equipment. the Infinity thermostat/control is simply the best on the market and the only way to go with an Infinity system. equipment model numbers listed are correct. you do want a new refrigerant lineset. what size outside condenser are you replacing? was a heat/cool load calc performed to verify correct equipment size? You do want the "T" tin plated evap coil. verify with dealer. I prefer venting out the side if possible over roof venting. what are you doing about a whole house air cleaner for IAQ and protection of blower motor and evap coil? do you have any issues with ductwork system that need addressing? ductwork is often the third leg of a new installation that is often overlooked. have you considered a Carrier ext warranty? I would only use a Carrier FAD-Factory Authorized Dealer. IMO Good Luck!...See MoreCarrier Infinity AC on Lennox 2 stage furnace/relocate to attic
Comments (3)"1.HVAC guy B tells me this is not a great idea as my Lennox furnace lacks the variable speed fan that is the key to getting the designed benefit out of the Carrier Infinity." a variable speed fan with infinity control provides better humidity control by reducing airflow to increase comfort. ````````````````````````````````````````````````````````` "2. HVAC guy B recommends that while I am replacing the system (A/C and Heat) for the upstairs area that I relocate the new unit from the basement to the attic. Guy B says this would eliminate approximately 20 linear feet of uphill ducting to get to the trunk line and improve the overall efficiency of heating and cooling upstairs." air follows the path of least resistance. if your source (furnace) is closer to your destination (your upstairs rooms) your system will perform better. 20 feet of ducting between your furnace and registers is a pretty good distance. your air will probably lose velocity by the time it reaches your upstairs. ````````````````````````````````````````````````````` "A. HVAC guy A says pumping refrig uphill causes accelerated failure of the system...yes, no maybe?" this is simply not true. if the lines are sized properly to allow for proper velocity and oil return you shouldnt have a problem. ``````````````````````````````````````````````````````````` "B. HVAC guy A and B both recommend using an 80% furnace in the attic vice a 90% furnace, which they recommend for the basement. Why not put a 90% in the attic? Is it because of the amount of water a 90% produces as a by product of combustion...and water in the attic is not a good thing?" heat rises. makes better sense if youre using a 90% and an 80% to put the higher efficiency furnace downstairs (where theres more heat loss) when some heat from the 90 is going to rise upstairs (where theres more heat gain)....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 MoreCarrier InfinityFurnace and Performance AC...which thermostat
Comments (54)Explanation by dealer is pure nonsense...as Mike says, blower motor can be adjusted to the 3 ton condenser...not an issue for someone who knows what they are doing!... Not the best coil choice either as far as performance/efficiency numbers. Here is a better choice. 7886932 Active Systems CARRIER AIR CONDITIONING PERFORMANCE SERIES PURON AC CARRIER AIR CONDITIONING 24ACC636A*030 CNPV*4324AL* 1080 58CTW090-16 34400 13.00 16.00 1RCU-A-CB Southeast and North 260 Yes IMO...See Moresktn77a
5 years agoAustin Air Companie
5 years agolast modified: 5 years agomike_home
5 years agotigerdunes
5 years agosktn77a
5 years agoD .
5 years agostlpooltime
3 years agostlpooltime
3 years agomike_home
3 years agostlpooltime
3 years agomike_home
3 years ago
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