not enough hot water

BOB_40

I have a problem.I installed a new 6-section Burnham,hot water,natural gas boiler and a 60-gallon super-store indirect HWH at my brother Jim's house about 1 year ago.Recently Jim renovated his bathroom,and we added a Grohe shower system,including 3-body sprays,1-shower head,and a hand held shower head,with the 3/4" Grohe valves.Jim now hates me because he runs out of hot water when he tries to use this wonderful shower system.How do I increase his HW supply? I should mention I use the pumping away piping system and I used an Argo contol with priority for the indirect heater.This is the only bathroom in the house,and its just Jim and his beautiful wife Helen [who probably also hates me but is too nice to say so]

BOB_40

not enough hot water!

I have a problem.I installed a new 6-section Burnham,hot water,natural gas boiler and a 60-gallon super-store indirect HWH at my brother Jim's house about 1 year ago.Recently Jim renovated his bathroom,and we added a Grohe shower system,including 3-body sprays,1-shower head,and a hand held shower head,with the 3/4" Grohe valves.Jim now hates me because he runs out of hot water when he tries to use this wonderful shower system.How do I increase his HW supply? I should mention I use the pumping away piping system and I used an Argo contol with priority for the indirect heater.This is the only bathroom in the house,and its just Jim and his beautiful wife Helen [who probably also hates me but is too nice to say so]

don_42

Did ya know?

> I have a problem.I installed a new 6-section

> Burnham,hot water,natural gas boiler and a

> 60-gallon super-store indirect HWH at my brother

> Jim's house about 1 year ago.Recently Jim

> renovated his bathroom,and we added a Grohe

> shower system,including 3-body sprays,1-shower

> head,and a hand held shower head,with the 3/4"

> Grohe valves.Jim now hates me because he runs out

> of hot water when he tries to use this wonderful

> shower system.How do I increase his HW supply? I

> should mention I use the pumping away piping

> system and I used an Argo contol with priority

> for the indirect heater.This is the only bathroom

> in the house,and its just Jim and his beautiful

> wife Helen [who probably also hates me but is too

> nice to say so]

ScottMP

Bob

If your brother is running all heads at the same time, he's using 12.5 gallons per minute. Thats a little under a five minute shower at 80 lbs. Please tell us you did'nt remove the flow restictors .

Even if he is'nt using the hand shower at the same time, thats a lot of flow.

Try adding a tempering valve at the tank ( we use Sparco ) and crank the tank up to 160. That should give him more water. Also check his inlet water preasure from the street. If he has higher than 80lbs you need a preasure reducing valve ( don't listen to him if he says he wants the preasure ).

Quote from Dan Holohan's Golden Rules Of Hydronic Heating :

Never Do Work For :

1. Your relatives

2. Your Church or,

3. Your Synagogue.

These jobs will never work.

Scott

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Brad White_5

Perhaps his

beautiful wife is joining him in the shower and hence the water SEEMS to run out way too soon.

A Scientific Observation of the Species

Dave Yates (PAH)

input / output

You need to determine the recovery rate for the combination of the boiler, transfer GPM rate through the indirect's coil and the tank manufacturer's recovery rates as matched to the required BTU's.

Next comes the ratio of hot to cold water, which is based upon the systems coldest (IT) incoming water, (ST) storage temperature & adjusted (BT) bather temp & it looks like this: Ratio = (BT-IT) ÷ (ST-IT)

If your storage temp is 140 F & the coldest water arrives at 38 F, the ratio becomes .628 or 62.8% of the flow is hot water if your adjusted bather temp is 102F.

140 minus 38 = 102 degree rise & 8.33 x 102 = 849.66 Btu's needed per gallon of flow.

Scott is right too. By raising the storage temp, you can check the ratio math above and see how many minutes your brother can stay in the shower - with or without the romance. Just make sure that's a certified ASSE 1017 thermostatic valve at the point-of-source outlet & not one that only says it complies with ASSE 1017.


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Cliff Brady

Recover the Heat!

Recover the Heat!

It may be cheaper and better for the environment to install a GFX waste heat recovery echanger. I have one that works great.

See http://gfxtechnology.com/ for more information and prices.

If you access to the stack and it is reasonable distance to the water heater you can solve the problem and lower the gas bill some. Combined with the mixing valve he should be set. Unfortunately copper prices are up quite a bit since I got mine so upfront costs are higher but their is still potential for payback. Call GFX and try to negotiate.

Let us know what you decide to do.

Chuckles_2

hmmm...

> Quote from Dan Holohan's

> Golden Rules Of Hydronic Heating :

>

> Never Do

> Work For :

> 1. Your relatives

> 2. Your Church or,

> 3. Your Synagogue.


Hmm. I guess your mosque or temple are ok.

John Starcher_4

..

Dale

Read Cliffs response

He's on the right track. If you can fit that gfx in the shower drain you'll be supplying 70degree cold water to the shower valve at no energy cost increase. IMHO these should be required in all new construction to save fuel.