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  1. I thoght I'd chime in with an issue regarding...

    I thoght I'd chime in with an issue regarding tankless water heaters, their warranties and how a recirculation system affects them. On most tankless units the warranty on the heat exchanger is...
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    I'm no plumbing expert but I am facing a similar...

    I'm no plumbing expert but I am facing a similar situation right now. We are remodeling a 4300 sq ft single story rancher. Our temps get up to 110F in the summer and down to 25F in the winter.

    All...
  3. The WH's will be in the "bump out shack". I would...

    The WH's will be in the "bump out shack". I would think that this shack would be insulated to some degree but I have not asked yet. If they are not, will the WH's use more gas to keep the water hot...
  4. I like the idea of installing the WH's in series...

    I like the idea of installing the WH's in series so that we have a full 150 gal reserve. And then the two could potentially make over 160GPH at a 90F rise. That would be way more capacity that we'll...
  5. Yep, we're going with two of these bad boy 75 gal...

    Yep, we're going with two of these bad boy 75 gal Bradford White's: http://www.bradfordwhite.com/high-input-atmospheric-vent-models These things will deliver 82 GPH at a 90F rise. That's quite...
  6. You're absolutely correct. Our contractor...

    You're absolutely correct. Our contractor recommended a recirculation line with a pump. We'll be using insulated aquapex so decrease the water temp dropoff.

    In fact he recommended we place one...
  7. Got it. That makes sense. The run from the street...

    Got it. That makes sense. The run from the street to the backflow device is fairly short (about 30ft or so). I have no control over that. But from the backflow device at the lot line to the water...
  8. The distance from the new main 8" line to the...

    The distance from the new main 8" line to the backflow device and regulator is about 30 feet. The distance from that point to the water meter is quite a ways - about 120 ft or more. I suppose we...
  9. Water meter inlet sizing and how it affects WH tank output

    Our community is having all the water mains replaced. They are woefully undersized at 4" so they're digging up the streets and going to a 8" line.

    As part of this project, they're running new...
  10. I found two Bradford White WH's that may work...

    I found two Bradford White WH's that may work besides the expensive AO Smith Vertex 100:

    #1 is a 75 gal plain ol' atmospheric vent model - 76k btu and it has a 82 GPH recovery at a 90 F rise:...
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    Most manuals are available on the manufacturer's...

    Most manuals are available on the manufacturer's website in pdf format.
  12. So what are you saying? That if I got with two...

    So what are you saying? That if I got with two 100k btu Vertex 100's or a couple of Bradford White 75 gal 76k btu tank units, that I'd have $16 more in gas bills a month than a couple of 199k btu...
  13. Thanks I'm going to look into this.

    Thanks I'm going to look into this.
  14. Yeah, and it's 1/4 the cost as well. My only...

    Yeah, and it's 1/4 the cost as well. My only concern is the recovery of these units at 80% efficiency is much lower.
  15. Dana, I love the idea of the drainwater heat...

    Dana, I love the idea of the drainwater heat exhanger but this is a single story ranch home that is over 100' wide and it has no basement to speak of. And because we're converting the area that...
  16. Update: My contractor likes the idea of the...

    Update:

    My contractor likes the idea of the two Vertex 100's. He says to put one unit on each side of the house so that each unit supplies half of the house.

    He also said that to save money...
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    Oh I understand that. But the manufacturer will...

    Oh I understand that. But the manufacturer will also state that HEATED recirculated water also shortens the warranty. IOW, if I run a separate electric heater to maintain a reserve tank and that...
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    Terry, but from what I've read once you hook up a...

    Terry, but from what I've read once you hook up a recirc line, the warranty on the typical tankless heat exchanger drops from 15 to 3 yrs. That's quite a dramatic drop in warranty period. Is that...
  19. We are changing out two wood burning fireplaces...

    We are changing out two wood burning fireplaces and converting them to gas units. The dryers in the two laundry rooms are gas. Plus the cooktop will change from electric to gas. So we are definitely...
  20. I do have NG available. I'm not sure of the size...

    I do have NG available. I'm not sure of the size line. I'm sure it's whatever is "standard" in this area. My guess is a 3/4" line.
  21. We have two central forced air HVAC units, one on...

    We have two central forced air HVAC units, one on each side of the house.
  22. I may be wrong on this point, but from what I've...

    I may be wrong on this point, but from what I've seen, the tankless heater manufacturers downgrade the typical 15 yr warranty on the heat exchanger to 3 years if you run a recirculation line. Just...
  23. Solution for 4300 sq ft rancher 5 bedrooms, 4 baths, 4 adults, triplet boys

    We going to move to a 1960's rancher in the Northern California Sierra Foothills that we are remodeling. The summers are blistering hot at 110F days and nighttime lows of 60F. Winters can get down...
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