HVAC zone can't keep up
Ben Laudermilch
2 years ago
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2 HVAC systems or 1 with 2 zones?
Comments (4)Two smaller systems are better than one large zoned system for a two story house. The drawback it is more expensive. I have two systems in my house. I chose to keep the two furnaces and AC condensers when I did a replacement four years ago. I feel the smaller units operate more efficiently. I also would worry about the zoning issues. You have to be very confident the HVAC contractor knows how set up the zones properly. The Carrier Infinity zoning is considered one of the best on the market, but it must be installed properly. What prices have you received for the two quotes?...See MoreComparing HVAC units, zone or not to zone
Comments (5)tomylake what is your location? what size is current upstairs system? how did it perform? let me be certain I have the correct picture. current air handler is in crawl space next to basement. supply runs and one return is located in attic? room registers are in ceiling? I would not zone the upstairs. Why? probably not cost or comfort effective? I would make the return modifications. Up to you as to whether leave air handler in crawlspace or relocate to attic. You did say existing system worked fine. You would get better airflow if air handler was relocated. How large is living area in basement? I might consider zoning this area off the main floor system. If you intend to live in this home for the forseeable future, then I would drop the Payne. Either Trane XR15 or Carrier's Performance 15 would be fine as long as they are properly matched with correct air handler. Here are the matches. 3514667 Active Systems XR15 WEATHERTRON TRANE 4TWR5018E1 4TEE3F39A1 20400 13.50 16.25 18400 9.00 905172 Discontinued Systems PERFORMANCE 15 PURON HP CARRIER AIR CONDITIONING 25HPA518A30 FV4BNF002 18000 12.50 15.50 17800 8.30 according to AHRI HP Directory, the Carrier system is discontinued and does not qualify for tax credit. The Trane system above does qualify and has excellent numbers. IMO...See More2 HVAC Units or Zoning?
Comments (7)Both ways are efficient however, with a zoning system the 8.5 ton will run when either or both t-stat calls for cooling or heating which means it will run a lot. With each seperate area having its on unit wear and tear will be less on equipment because you won't have just one unit running pretty much all the time. But the zoning system should be cheaper and both ways will be just as efficient and should maintain temperature well. Try to get at least a ten year warranty on your equipment trust me it will pay off and if you dont mind me asking what brand of equipment have you been quoted on?...See MoreSingle HVAC zoned or two HVACs without zoned system
Comments (27)The biggest problem with HVAC zone systems is knowing when to choose it as a solution and when not to. Some HVAC companies it's about "sell, sell, sell" whether or not it works... there's more money in "sell, sell, sell" --- when it's only about money? So does the comment above mean I do it for free? No. If you think that you are reading things that aren't there. New construction? best to choose separate systems 9 times out of 10. In order for a zone system to work, you have to know what you are doing. Most HVAC companies staff (the techs they send you) are 20-30 year olds. How much practical experience could they possible have? It's best for HVAC zone systems to be an elegant solution. A HVAC zone system is a tool in the tool bag. Not all homes are suitable for zone systems. Some homes there is no other way, and in some cases complications to those problems will make an HVAC zone system design possibly more prone to problems. You have a problem now, do you want more problems. These decisions among others are decided "in person" --- so considering that becareful what information you decide upon from the internet. Just because it's here doesn't necessarily mean it's true. That said: Depending on equipment level chosen, how many different floors you have in your structure, how much room you have available... will all be factors that make you decide one way or another. From there it's in your best interest to pick a contractor that is skilled: especially when it comes to HVAC zone systems. (there's a lot of garbage out there.) (click to enlarge if necessary) I service the Katy, Texas area....See MoreBen Laudermilch
2 years agoBen Laudermilch
2 years ago
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