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  #1  
Old 7/31/12, 6:22 PM
Joseph Hagarty, CMI's Avatar
Joseph Hagarty, CMI Joseph Hagarty, CMI is offline
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Default Water Heater Sizing

New Construction...
3 Bedroom
3 Bathroom
Whirlpool Tub (40 - 50 Gallon)
Dishwasher...
Washing Machine...
New 50 gallon Bradford White Electric Water Heater....

Would you recommend replacement?

Attached Files
File Type: pdf RightSpec Example.pdf (29.8 KB, 4718 views)



Joe Hagarty
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  #2  
Old 7/31/12, 8:12 PM
James E. Braun, CMI's Avatar
James E. Braun, CMI James E. Braun, CMI is online now
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Default Re: Water Heater Sizing

Was the water hot when the jetted tub was done filling?



Braun Inspection Consultants
Serving Jefferson City, Columbia, Sedalia, Fulton and Lake of the Ozarks
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  #3  
Old 7/31/12, 8:19 PM
Joseph Hagarty, CMI's Avatar
Joseph Hagarty, CMI Joseph Hagarty, CMI is offline
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Default Re: Water Heater Sizing

Unit is undersized (although NEW) and in need of replacement..
I just check the design specs...
and recommend accordingly...



Joe Hagarty
mrdryervent@gmail.com

Cell: (484) 883-7018
InterNACHI
Boulder, Colorado

National President / NACHI (2003-2004)
NACHI Education Committee Member
Certified CMI Master Inspector Instructor
PA NACHI Certified Inspector # 01102902
PA Licensed Radon Inspector # 2080
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  #4  
Old 7/31/12, 10:05 PM
Jeffrey R. Pope, CMI's Avatar
Jeffrey R. Pope, CMI Jeffrey R. Pope, CMI is offline
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Default Re: Water Heater Sizing

First hour recovery is 122 gallons? I'm not sure I understand that reference sheet you provided.

UPC requires a minimum first-hour rating of 62 gallons for 3 bedrooms and 3 bathrooms.



IF YOUR INSPECTOR IS NOT USING THERMAL IMAGING, YOU'RE NOT GETTING THE WHOLE PICTURE ®
Jeff Pope
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Santa Clarita CA
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Santa Clarita Home Inspection
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  #5  
Old 7/31/12, 10:20 PM
James E. Braun, CMI's Avatar
James E. Braun, CMI James E. Braun, CMI is online now
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Default Re: Water Heater Sizing

Does that include a large tub, Jeff?

I think the 122 galons is overkill but I am not an engineer.



Braun Inspection Consultants
Serving Jefferson City, Columbia, Sedalia, Fulton and Lake of the Ozarks
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  #6  
Old 7/31/12, 10:22 PM
Jeffrey R. Pope, CMI's Avatar
Jeffrey R. Pope, CMI Jeffrey R. Pope, CMI is offline
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Default Re: Water Heater Sizing

Quote:
Originally Posted by jbraun View Post
Does that include a large tub, Jeff?
There's no specification for "large" tubs, but that is the minimum design criteria for your "standard" full-bathroom.



IF YOUR INSPECTOR IS NOT USING THERMAL IMAGING, YOU'RE NOT GETTING THE WHOLE PICTURE ®
Jeff Pope
JPI Home Inspection Service
Santa Clarita CA
(661) 212-0738
Santa Clarita Home Inspection
http://www.MyInspector.net


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  #7  
Old 7/31/12, 11:39 PM
Joseph Hagarty, CMI's Avatar
Joseph Hagarty, CMI Joseph Hagarty, CMI is offline
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Default Re: Water Heater Sizing

Jeff.
The attachment is from Bradford White
it is a Spec Site to be used by Builders / Architects.
I have been using it for many years...

http://rightspec.bradfordwhite.com/S...sidential.aspx

I am not saying the 50 Gallon Heater is inadequate...
The Manufacturer of the Unit that the Builder chose to install...
Says it is Inadequate...



Joe Hagarty
mrdryervent@gmail.com

Cell: (484) 883-7018
InterNACHI
Boulder, Colorado

National President / NACHI (2003-2004)
NACHI Education Committee Member
Certified CMI Master Inspector Instructor
PA NACHI Certified Inspector # 01102902
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Last edited by jhagarty; 7/31/12 at 11:42 PM..
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  #8  
Old 7/31/12, 11:45 PM
Marcel Gratton, CMI's Avatar
Marcel Gratton, CMI Marcel Gratton, CMI is offline
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Default Re: Water Heater Sizing

All I can say is that I wish at times, when teenagers are using the shower, that the water heater was 5 gallons instead of 60 gallons...



Marcel Gratton, NACHI04011210, CMI
On The Level Inspection
Gatineau, Québec
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  #9  
Old 8/1/12, 12:09 AM
Jeffrey R. Pope, CMI's Avatar
Jeffrey R. Pope, CMI Jeffrey R. Pope, CMI is offline
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Default Re: Water Heater Sizing

Quote:
Originally Posted by jhagarty View Post
Jeff.
The attachment is from Bradford White
it is a Spec Site to be used by Builders / Architects.
I have been using it for many years...

http://rightspec.bradfordwhite.com/S...sidential.aspx

I am not saying the 50 Gallon Heater is inadequate...
The Manufacturer of the Unit that the Builder chose to install...
Says it is Inadequate...
Ok, now I see it. 122 is the tank capacity...

It appears the recovery rate on the electric water heaters is very low, which could explain why such large tanks are suggested.

I have a 50 BW gas-fired water heater in my home, which has a first hour rating of 85 gallons.

So in your case, yes, I would suggest a larger tank, or multiple tanks.



IF YOUR INSPECTOR IS NOT USING THERMAL IMAGING, YOU'RE NOT GETTING THE WHOLE PICTURE ®
Jeff Pope
JPI Home Inspection Service
Santa Clarita CA
(661) 212-0738
Santa Clarita Home Inspection
http://www.MyInspector.net


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  #10  
Old 8/1/12, 1:20 AM
Robert Ernst Robert Ernst is offline
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Default Re: Water Heater Sizing

Today's house had 3 bedrooms and a jetted tub and they had a 80 gallon tank.



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  #11  
Old 8/1/12, 5:06 AM
Joshua L. Frederick Joshua L. Frederick is online now
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Default Re: Water Heater Sizing

I have a 4 bed/3 bath, without a whirlpool, and a 50g electric. We run low on hot water quite a few times.....6 people
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  #12  
Old 8/1/12, 10:59 PM
Pete Campbell's Avatar
Pete Campbell Pete Campbell is offline
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Location: Fort Pierce, FL
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Default Re: Water Heater Sizing

Quote:
Originally Posted by jhagarty View Post
New Construction...
3 Bedroom
3 Bathroom
Whirlpool Tub (40 - 50 Gallon)
Dishwasher...
Washing Machine...
New 50 gallon Bradford White Electric Water Heater....

Would you recommend replacement?

Your scenario is perfectly normal in Port St. Lucie, FL, where there is little to no natural gas or propane in use.





Pete Campbell

pete4545@comcast.net
http://www.PortStLucieInspections.com
www.GuaranteedInspections.us



Inspecting Fort Pierce, St. Lucie Village, Lakewood Park, Vero Beach, Indian River Shores, Sebastian, Fellsmere, Fort Drum, Okeechobee, Jensen Beach, Stuart, Palm City, Hobe Sound and Indiantown, Florida.
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  #13  
Old 8/1/12, 11:08 PM
Joseph Hagarty, CMI's Avatar
Joseph Hagarty, CMI Joseph Hagarty, CMI is offline
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Location: Boulder, Colorado
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Default Re: Water Heater Sizing

Pete,
Natural gas is the norm in this area...
50 Gallon Gas (Natural or LP) would have been within the sizing spec...
50 Gallon Electric.... Inadequate by Manufacturer Specification...
I think the Builder / Architect
overlooked the difference....



Joe Hagarty
mrdryervent@gmail.com

Cell: (484) 883-7018
InterNACHI
Boulder, Colorado

National President / NACHI (2003-2004)
NACHI Education Committee Member
Certified CMI Master Inspector Instructor
PA NACHI Certified Inspector # 01102902
PA Licensed Radon Inspector # 2080
PA Licensed Pesticide Applicator # 700884
Delaware Licensed Home Inspector # H4-071
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Need a home inspection in Kentucky? Check out InterNACHI's listing of Kentucky certified home inspectors. Or, find a home inspector anywhere in the world with our inspection search engine.
  #14  
Old 8/1/12, 11:57 PM
Marcel Gratton, CMI's Avatar
Marcel Gratton, CMI Marcel Gratton, CMI is offline
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Location: Gatineau, QC
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Default Re: Water Heater Sizing

Quote:
Originally Posted by jfrederick View Post
I have a 4 bed/3 bath, without a whirlpool, and a 50g electric. We run low on hot water quite a few times.....6 people
Heck, I have a 3 bed/1 bath and a 60 gal. electric and at time take a cold shower...

Electric water heaters have a slow recovery rate thus the larger storage requirements.



Marcel Gratton, NACHI04011210, CMI
On The Level Inspection
Gatineau, Québec
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  #15  
Old 8/2/12, 1:35 AM
Joseph Hagarty, CMI's Avatar
Joseph Hagarty, CMI Joseph Hagarty, CMI is offline
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Default Re: Water Heater Sizing

Quote:
Originally Posted by mgratton View Post
Heck, I have a 3 bed/1 bath and a 60 gal. electric and at time take a cold shower...

Electric water heaters have a slow recovery rate thus the larger storage requirements.
The Architect knows that and missed....
The Builder knows that and missed...
The Muninicipal / City Inspector knows that and missed...

If the Buyer hires an Inspector and the Inspector does not comment....
who pays for the NEW Water Heater....

LOL



Joe Hagarty
mrdryervent@gmail.com

Cell: (484) 883-7018
InterNACHI
Boulder, Colorado

National President / NACHI (2003-2004)
NACHI Education Committee Member
Certified CMI Master Inspector Instructor
PA NACHI Certified Inspector # 01102902
PA Licensed Radon Inspector # 2080
PA Licensed Pesticide Applicator # 700884
Delaware Licensed Home Inspector # H4-071
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