Comments on: An Improved System for Even Faster Hot Water https://www.energyvanguard.com/blog/an-improved-system-for-even-faster-hot-water/ Building science knowledge, HVAC design, & fun Wed, 16 Oct 2024 09:56:58 +0000 hourly 1 https://wordpress.org/?v=6.6.2 By: andrew light https://www.energyvanguard.com/blog/an-improved-system-for-even-faster-hot-water/#comment-44889 Tue, 15 Oct 2024 13:54:18 +0000 https://www.energyvanguard.com/?p=9235#comment-44889 In reply to Bret Kline.

You can install a 115 volt point of use water heater and just set the thermostat a few degrees lower than the hybrid, that way it shuts off. google this for application info.
BCEE88F0-33E4-4939-B03F-117E983BDE16.pdf

]]> By: Don Poindexter https://www.energyvanguard.com/blog/an-improved-system-for-even-faster-hot-water/#comment-44882 Mon, 14 Oct 2024 22:03:40 +0000 https://www.energyvanguard.com/?p=9235#comment-44882 In reply to Bret Kline.

It’s my understanding that you aren’t supposed to pipe anything but cold water into an on demand water heater, but I could be wrong. I would contact the manufacturer first before hooking up any variation of that sort.

]]> By: Robert Jordan https://www.energyvanguard.com/blog/an-improved-system-for-even-faster-hot-water/#comment-44878 Mon, 14 Oct 2024 17:16:28 +0000 https://www.energyvanguard.com/?p=9235#comment-44878 Ask Stiebel-Eltron. My recollection is that I asked that question and they told me the heater would turn off when the hot water reached the on demand heater.

]]> By: Bret Kline https://www.energyvanguard.com/blog/an-improved-system-for-even-faster-hot-water/#comment-44865 Sun, 13 Oct 2024 15:48:05 +0000 https://www.energyvanguard.com/?p=9235#comment-44865 I’m retrofitting a 1864 brick farmhouse house. I will have a 75ft run from the electric hybrid heat pump water heater in the unheated basement to a mother in-law suite with a full kitchen and bath with a shower. I was planning on running 3/4″ hot and cold pex-a water lines from the basement to the suite. To reduce the cold hot water issue, I was planning on adding a small electric on-demand hot water heater inside of the suite and plumb the 3/4″, 75ft hot water run from the basement into the on demand suite hot water heater. Is there an on-demand hot water heater that will kick on when unheated hot is flowing but turn off when the heated water from basement hybrid water heater finally reaches the on demand suite heater? Is the a good or bad idea? Will this pass code?

]]> By: Don Poindexter https://www.energyvanguard.com/blog/an-improved-system-for-even-faster-hot-water/#comment-44864 Sun, 13 Oct 2024 13:44:53 +0000 https://www.energyvanguard.com/?p=9235#comment-44864 Then there is always (at an obvious increased cost) the option of on demand water heaters installed at the point of use.
The wait for hot water is negligible, you don’t have a single point of failure with a single hot water heater (so with more than one bathroom you would always have one that works), and no worry of the old “flush while someone is in the shower” problem. It would decrease the amount of plumbing needed, so no heat loss along the way, fewer points to leak, and no tank problems.
Disadvantages being the increased cost, where to put the water heaters and, in my case, solar would be out of the question.
Here in Orlando, I’m keeping my solar.

]]> By: Rich https://www.energyvanguard.com/blog/an-improved-system-for-even-faster-hot-water/#comment-44856 Sun, 13 Oct 2024 01:52:01 +0000 https://www.energyvanguard.com/?p=9235#comment-44856 Just put a temp sensor with timer with recirc pump. Only runs when temp gets below a certain temp, and doesn’t run overnight. Is it perfect? No, but definitely saves on consumption of gas and el.

]]> By: Allison Bailes https://www.energyvanguard.com/blog/an-improved-system-for-even-faster-hot-water/#comment-44851 Sat, 12 Oct 2024 12:08:37 +0000 https://www.energyvanguard.com/?p=9235#comment-44851 In reply to Andrew Light.

Andrew: Thanks for mentioning that. I wrote about how the evolution of plumbing fixtures from high to low flow and the effect on hot water delivery in this article:

Why Your Hot Water Takes So Long
https://www.energyvanguard.com/blog/why-your-hot-water-takes-so-long/

For those who want to download the free Copper Tube Handbook, here’s the link:

https://copper.org/applications/plumbing/cth/

And for those wondering what type M is, copper pipe for supply plumbing comes in three types: K, L, and M. Type K has the thickest walls and is typically used for underground applications. Type L has the next thickest walls and is best for indoor plumbing. Type M has the thinnest walls and its main advantage is that it’s cheaper.

]]> By: Allison Bailes https://www.energyvanguard.com/blog/an-improved-system-for-even-faster-hot-water/#comment-44850 Sat, 12 Oct 2024 11:49:52 +0000 https://www.energyvanguard.com/?p=9235#comment-44850 In reply to Will Brown.

Will: Aye, that’s going to happen soon.

]]> By: MasterPlumber https://www.energyvanguard.com/blog/an-improved-system-for-even-faster-hot-water/#comment-44844 Fri, 11 Oct 2024 20:55:04 +0000 https://www.energyvanguard.com/?p=9235#comment-44844 In reply to Allison Bailes.

Not true. It’s a pia and stupid. Looks like hell and waste of money.

]]> By: Will Brown https://www.energyvanguard.com/blog/an-improved-system-for-even-faster-hot-water/#comment-44843 Fri, 11 Oct 2024 17:52:50 +0000 https://www.energyvanguard.com/?p=9235#comment-44843 I would spend a couple of bucks and insulate the copper manifold to stop heat lost.

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