Thanks for the information ... I have been a big proponent of the systems

I've seen these before and they are gaining in popularity, but you need natural gas to run one.  In my area this is a huge problem.  We are just now getting access to this resource.

I'm sending this information to my husband, Andrew.  We're in new construction (well, at least we were three years ago) and have a whopping 75-galloner sitting downstairs.  If we replace this thing now, we might actually add to the math and be able to sell THIS one for a few bucks!  Or we could saw it in half, drill holes in the sides, and grow tomatoes on the back deck. 

Cheers! and Thanks! from DC...

     Jaynee

Brandon - Tankless systems also come in electric models.  A quick google search of electric tankless hot water heaters will result in many options.  http://www.google.com/search?q=electric+tankless+hot+water+heater&sourceid=ie7&rls=com.microsoft:en-US&ie=utf8&oe=utf8

Great Post. We all need to look toward conservation of our resources including our own wallet.

Great news and analysis.  Also, I appreciate the info on the $300 credit.  Cheers

Very valuable information.  I have wondered about how tankless water heaters work.  Thanks for compile this resource.

Great timing-I just talked a client into putting these systems into their new home.  She'll be pleased to read that I'm not the only one talking about it. =)

Thanks for this post, Andrew. We have been considering replacing our old water heater with this type when it dies. We would like to be "green" and it seems so wasteful to heat this water 24/7 when we use it so little.  We have heard through the grapevine (not always reliable) that the monthly savings is related to the cost of fuel in your area and ours wouldn't be a substantial savings. I would like to hear from people in the midwest with this to see if it has saved them money. Maybe the natural gas and electric ones are different in utility bill savings, also?

Just closed on the first house I've seen with one of these.  So far my buyers absolutely love it, and I'm thinking about using one in my new home I'm building.  Great info!  thanks

Thanks Andrew -- I just commented on a post yesterday about this same subject.  Hopefully in the near future tankless hot water heaters will be the standard in new construction.

Andrew,  Thanks for sharing.  The video clip was very informative and saved me the research on something I needed to know.  Thanks!

Andrew - Great Post!  Have you had any problems with yours?  I may recommend this to a client who is interested in super energy savings on his home...Thanks...

WOW...

I will need to look into this...

Thanks for the information.  I only hope I never have to figure this out.  I'll leave it in my dear husbands category of things to do. 

thanks for the info on the tankless water heater. 

Very valuable info - Thanks so much!

Terry - The savings would be regional, but I cannot imagine that it would not be very significant.  Rather than 24/7/365 heating like you have in a tank heater, you are only heating the water for the hour or so that you may use it each day.  I am curious to know what your research will turn up in your area.  Please keep me posted. 

Eva - I have had zero problems with mine since installing it.  knock on wood!  I have noticed no change in performance at all in 3.5 years and we have 60+ year old pipes in a 100 year old home.  

• This is very helpful infomration. In the Older homes in Clintonville Ohio, the older hot water tanks always seem to break the week before closing!

This sounds great I have been thinking of having one of these installed.  Where did you get yours?

 Rain - I picked up mine at Home Depot.  I installed an Aquastar Whole House system.  They are manufacutred by Bosch. 

Great information Andrew! I am going to recommend one of these to my current buyers.

I have helped a couple of my clients to install Rinnai units. They all love it .In Europe ,Japan and other countries that is what people use.

Andrew, is there any downside to these tanks? 

Everyone I know who has a tankless system loves it.  Personally, I want one bad.  Guess I need to close a few more deals.  :)  Nothing more frustrating than not being able to use the jetted tub because your water heater tank is undersized!

Hi Andrew - thanks for the info in this post, the links are great to have for some more research.  I talked with a guy who works in the Rinnai tankless heaters at a Home Show recently.  I really liked what he showed us, and am leaning that way when I need to replace my current water heater.

Thanks again for the links you have in this post!
Ann

Andrew - enjoyed this stuff - wish I'd known about it when I replaced my water heater last year.

We installed an under-sink tankless hot water system for the hot water dispenser at our kitchen sink.

LOVE IT!!!

Is there also a tax rebate?

If not, I'm still a happy consumer. 

Thanks for the tip and information. Appreciate it.

Good information Andrew. It's always good to hear the personal experiences also. 

LIsa - There is a downside.   The only one I have come across and that is that because the tank is not always hot you have to run the water about 10 seconds longer than normal for hot water to appear at the tap. Not a big deal though.  If you have a large home (mcmansion) you may have to install a couple at strategic points in the home.  Or perhaps one for a first floor and one for a second in an old Victorian.  You could also consider a on room unit rather than several whole house units as you would probably only use them for a bathroom on a second floor. 

Roberta - The tax rebates are only for the larger units.  I don't think they are available for your under sink unit.  Sorry...

I have Takagi tankless ("demand") water heaters installed at my home, my office, and several of my rental units. O the whole I've been quite satisfied with them... But... there a number of potential "gotchas" in tankless installations, especially if you are replacing an existing tank type water heater. I've put together a page of my collected posts about this installation at:

http://paragoninspects.com/home-inspection-tankless-water-heater-installation-problems-faq.html

• MIchael,  That is an excellent post and thank you for the link to your site.  It is a fabulous resource!  I appreciate it.

Andrew

My pleasure, hopefully that information will save others some time and grief by avoiding the time we spent crawling up the learning curve on these units – we had some *very* unhappy contractors when things had to be redone because they were not familiar with demand heaters.

I just went back, cleaned up the page formatting, fixed a few typos, added a few manufactures’ links, and added a brief note on energy efficiency.

Please fee free to link to that  page (or any of the informational pages on the new site) if you wish – over the next few weeks we will be porting a lot of this sort of  technical information over form the old format (mostly PDFs) and into .html FAQs.

Best,

MDT