My question is no the merits of a recirc system, but can it deliver sufficient hot water to a high performance shower system needing 15+ gpm. What size/spec hot water heater is recomended? Any sugesstions would help.
Discussion Forum
Discussion Forum
Up Next
Video Shorts
Featured Story
Dangerous electrical work and widespread misconceptions cause fires, deaths, and $1.5 billion in property damage annually.
Featured Video
Highlights
"I have learned so much thanks to the searchable articles on the FHB website. I can confidently say that I expect to be a life-long subscriber." - M.K.
Fine Homebuilding Magazine
Fine Home Building
Follow
-
Fine Homebuilding
Dig into cutting-edge approaches and decades of proven solutions with total access to our experts and tradespeople.
Start Free Trial Now -
GBA Prime
Get instant access to the latest developments in green building, research, and reports from the field.
Start Free Trial Now
- Home Group
- Antique Trader
- Arts & Crafts Homes
- Bank Note Reporter
- Cabin Life
- Cuisine at Home
- Fine Gardening
- Fine Woodworking
- Green Building Advisor
- Garden Gate
- Horticulture
- Keep Craft Alive
- Log Home Living
- Military Trader/Vehicles
- Numismatic News
- Numismaster
- Old Cars Weekly
- Old House Journal
- Period Homes
- Popular Woodworking
- Script
- ShopNotes
- Sports Collectors Digest
- Threads
- Timber Home Living
- Traditional Building
- Woodsmith
- World Coin News
- Writer's Digest
Replies
I don't know about recir systems, but a tankless water heater will keep up with that flow rate all day long.
Regards,
Scooter
"I may be drunk, but you're crazy, and I'll be sober tomorrow." WC Fields, "Its a Gift" 1934
Which tankless water heater(s) will provide hot water at 15 gpm?
Noritz has several models. They can also be daisy chained to increase capacity, so their capacity is unlimited.Regards, Scooter"I may be drunk, but you're crazy, and I'll be sober tomorrow." WC Fields, "Its a Gift" 1934
The existence of a recirculating system should have no effect on this except to save the fraction of a second it would take the hot water to get from the tank to the shower. (At 15 GPM, you wouldn't have much of a wait!) That said, even a 50-gal tank would be empty after about 5 minutes or less and I am wondering what is planned to make sure you can drain this deluge away? Sounds like a fire hose more than a shower. A 15 GPM shower kind of makes the water-saving toilet seem a bit, er, pointless?
Mike Hennessy
Pittsburgh, PA
Aggreed. I'm not concerned with water savings in this case and I'm no sure a recirc system is the way to go. I'm more concerned with delivering an adequate supply of hot water to the shower. Could one 75 gal. do the trick or 100 gal. or do I need tankless?
Do the math. How long is your longest shower? Will anyone else be doing anything else for the next hour, like clothes, dishes, washing their hands?I think only tankless or 2 80's would do the trick.Regards, Scooter"I may be drunk, but you're crazy, and I'll be sober tomorrow." WC Fields, "Its a Gift" 1934
With that much volume I would look into tankless. Also a waste water heat recovery system to temper the supply to the H2O heater. I think the term is GFX, for Gravity Flow heat eXchanger.
Garet