HVAC duct air flow issue
Keith Hoar
last year
last modified: last year
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cat_ky
last yearKeith Hoar
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Final issues in all new hvac and ducting
Comments (4)The IAQ can control humidity by either overcooling or through the DHM terminals on the EIM. The DHM terminals can either control a dedicated dehumidifier or a VS blower in the air handler. Either way, the IAQ has to be correctly programed, and the EIM DHM terminals have to be wired to the the air handler or dehumidifier properly. No bets on any of that having been done correctly. My new system is living proof that it can be done wrong. This thread reminds me that I need to correct it now that summer is nearly upon us. Even if the EIM is wired to the VS air handler correctly, the installer still has to program the IAQ for the correct brand. Rheem, for example, is different that most of the other makes. I recommend that you defend yourself by making sure you have all the relevant documentation on hand. You need at least five documents. 1. The VisionPro IAQ Operating Manual 69-1815EFS-06 2. VisionPro IAQ Total Home Comfort System 68-0287-1 3. Honeywell VisionPro Installation Guide 69-1816EFS 4. Honeywell VisionPro Installation Guide EIM 69-1823EFS-1 5. The installation/wiring diagram for your air handler. The four Honeywell IAQ documents are all different manuals, although there is some overlap. They are all available on line as PDFs. You will need to do a thorough Google search to get them all. The suffixes following the last dash appears to be the revision number. I would leave that out of the search. If you have a hard copy of any manual that covers the installer setup, use that instead of a download. Not all the downloads are current. If they didn't leave you one, demand it. Failing that, compare your PDF version with the actual settings on your IAQ. If the PDF is missing a setting or two, you have the old version. Lastly, you really need to learn all the programming of the IAQ, not just the owner part, but the installer part, too. There are far too many HVAC "pros" out there that don't have a clue on how to set one of these up properly. It's not just the dehumidification that you need to understand, but the AUX heat lockout settings as well. If not done just right, the IAQ will happily keep a very even temperature in your house by running the aux heat when you don't need it. That's how mine was left by the installers. Luckily, I spotted it before I got an astronomical power bill....See MoreHVAC: House Design - HVAC input please
Comments (6)I suggest separate systems for the first and second floor. That is the best way to have even temperatures on each floor. It costs more up front, but you potentially have lower operating costs. You could zone the loft off the second floor system. However if you are going to be working 10 hours days with multiple pieces of equipment generating heat then spend the money on a mini split....See Moreany issues putting portable air condition outlet hose into hvac input?
Comments (7)In technical terms I can only explain it if you understand how a refrigeration cycle works. In simple terms air conditioning cools a room by removing heat from the room and releasing it outdoors. Go to your outside unit while it's cooling and you will see that hot air is coming from it. You will notice the same hot air on the outdoor portion of window units. Doing as you propose doesn't transfer the heat outdoors. Making matters worse,the heat generated by the portable's motor is added to indoor air. If you are willing to tolerate some Rube Goldberg contraption,have someone run a flexible hose from a large fan on stair landing up stairwell to 3rd floor. That will transfer cold air from lower floor to upper floor. As I already said,a tech that know's what he's doing can make your system cool all rooms. One can only tell what's wrong after examining the system but it could be simple as a duct which has come loose. Does all your neighbors have the same problem?...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 Moresktn77a
last yearKeith Hoar
last yearStax
last yearlast modified: last yearCharles Ross Homes
last yearKeith Hoar
last yearlast modified: last yearCharles Ross Homes
last yearmillworkman
last yearKeith Hoar
last yearCharles Ross Homes
last yearlast modified: last year
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