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08-01-2011, 09:21 PM
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#1 | | RS controls my life!
Join Date: Jul 2002 Location: Vancouver, BC
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| Rheem On Demand Water Heater
Does anybody have an on-demand water heater system at home, specifically the Rheem branded boxes available at Home Depot? It's about time to change out my hot water tank and have heard mixed reviews about the on-demand system. Any experiences that you can share would be appreciated.
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08-01-2011, 10:20 PM
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#2 | | In RS I Trust
Join Date: Mar 2003 Location: Mission
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Check out Bosh Astravan in Vancouver sells them. They have better warranties on the parts and heat exchanger.
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08-01-2011, 10:42 PM
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#3 | | Hacked RS to become a mod
Join Date: Feb 2002 Location: Sunny Hong Kong
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In my experience, GAS on-demand water heaters work really well, until they get to about 10 years old. Electric, I'm not sure, as mine are tank heaters now that I've moved to a place with no gas.
Gas though, you get hot water within seconds, and it lasts until you're done 
Not sure about brands though, I have only used these things in HK
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08-02-2011, 04:12 PM
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#4 | | Rs has made me the man i am today!
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How many people are currently living in the house?
If 4 or less, then instant hot water heater would be considerable
But if you have a large family living in the house, then just stick to your hot water tank.(50 gallon or more)
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08-02-2011, 04:13 PM
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#5 | | Rs has made me the man i am today!
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also like skinny pup mentioned, i used them in HK and China, and they supplied hot water instantly and continuously. But they all need to be power vented or be mounted outdoors.
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08-02-2011, 05:27 PM
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#6 | | RS controls my life!
Join Date: Jul 2002 Location: Vancouver, BC
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4 people, 2 bathrooms, 1 dishwasher.
I rent the basement out to 2 tenants and am afraid that we'd run out of hot water if one of them and one of us were showering at the same time while the dishwasher was in use or something.
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08-02-2011, 07:26 PM
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#7 | | To me, there is the Internet and there is RS
Join Date: Apr 2004 Location: Nanaimo
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| Quote:
Originally Posted by Frenchie  4 people, 2 bathrooms, 1 dishwasher.
I rent the basement out to 2 tenants and am afraid that we'd run out of hot water if one of them and one of us were showering at the same time while the dishwasher was in use or something. | Some of the newer models can do 4 showers at once but they are gas. Electric ones can't do as many and you might need to upgrade your electrical because they draw lots of power.
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08-02-2011, 08:45 PM
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#8 | | Rs has made me the man i am today!
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| Quote:
Originally Posted by Frenchie 4 people, 2 bathrooms, 1 dishwasher.
I rent the basement out to 2 tenants and am afraid that we'd run out of hot water if one of them and one of us were showering at the same time while the dishwasher was in use or something. |
i would suggest the hot water tank heater route. It is more economical for your household.
what size hot water tank you have currently?
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08-02-2011, 08:46 PM
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#9 | | Rs has made me the man i am today!
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| Quote:
Originally Posted by Manic! Some of the newer models can do 4 showers at once but they are gas. Electric ones can't do as many and you might need to upgrade your electrical because they draw lots of power. |
whats the btu input rating on those?
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08-02-2011, 10:05 PM
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#10 | | To me, there is the Internet and there is RS
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| Quote:
Originally Posted by Doubl3_H whats the btu input rating on those? | Tankless Hot Water Heater | Tankless Water Heaters Gas | On Demand Hot Water Heaters
It also depends on incoming water temp.
Turbo Flow - Up to 11.1 GPM @ 35 degree temperature rise (9.3 GPM @ 45 degree rise).
You can combine more than one unit for extra flow.
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08-03-2011, 06:37 PM
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#11 | | In RS I Trust
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I'm the BC distributor of Nortiz. They bad thing about them is the venting costs a whole lot of cash.
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08-03-2011, 09:47 PM
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#12 | | RS controls my life!
Join Date: Jul 2002 Location: Vancouver, BC
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I currently have a 41.6 gallon tank. If I were to get an on-demand system, it'd be with natural gas.
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08-04-2011, 07:30 PM
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#13 | | In RS I Trust
Join Date: Mar 2003 Location: Mission
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| Quote:
Originally Posted by Frenchie 4 people, 2 bathrooms, 1 dishwasher.
I rent the basement out to 2 tenants and am afraid that we'd run out of hot water if one of them and one of us were showering at the same time while the dishwasher was in use or something. | what is the total for the house? I can find out what size would work for you through my work. They are expensive just to let you know be prepared to spend over $1500 for the unit alone.
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08-04-2011, 09:52 PM
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#14 | | RS controls my life!
Join Date: Jul 2002 Location: Vancouver, BC
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Total of what?
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08-05-2011, 02:26 PM
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#15 | | In RS I Trust
Join Date: Mar 2003 Location: Mission
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Originally Posted by Frenchie Total of what? | sorry I guess that would help. Told amount of people how many bathrooms etc as well everything that could be on at once (dishwasher, washing machine etc)
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08-05-2011, 11:30 PM
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#16 | | RS controls my life!
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4 people, 2 showers, 1 dishwasher, 1 washing machine, 4 total sinks (2 kitchen, 2 bath).
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08-06-2011, 09:17 PM
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#17 | | I *heart* Revscene.net very Muchie
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i dont see why you'd ever need one that could handle the max....why get a larger unit if you'll never use the max capacity
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08-10-2011, 12:30 PM
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#18 | | In RS I Trust
Join Date: Mar 2003 Location: Mission
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| Quote:
Originally Posted by Frenchie 4 people, 2 showers, 1 dishwasher, 1 washing machine, 4 total sinks (2 kitchen, 2 bath). | if you want it sized correctly I found out the ground temp and flow rate of the shower and the tap heads matter just to let you know
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08-13-2011, 03:24 PM
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#19 | | I don't get it
Join Date: Feb 2002 Location: Coquitlam
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i have 4 adults and one child in my house and i have a electric on demand water heater.. it is great. no problems.
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08-17-2011, 11:30 AM
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#20 | | I am Hook'd on RS
Join Date: Jan 2007 Location: vancouver
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It's funny how this technology is just starting to be adopted in North America, whereas it was already being used in Asia for 20+ years.
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