Not accurate. The flow rate reduces so if your usage temperature is the same you're using the same energy. The difference is only which pipe the energy is flowing in...

Either you have flow issues meaning not enough pressure ,not enough gas going to unit or if indoor unit lack of fresh air to maintain flame

I understood it as you're not using excess energy to heat the water to 120 when you only need 104.

@@Heffbomb yes why heat all the way to 120 and cool it back to 104

justpar2012 i

Probably cross connection

same is happening with my unit

ours are good.....there is 20 in the flats i live in....all outdoors and hundreds in my suberb....ive never had any problms....they are all the 1200 model........but then sydney never freezes....sooooo....im thinking it must just be a problem for folks with ice issues....otherwize our slightly alkaline water must sort the calcium carbonate problem.

+oillio How does a man live to be his age and not know that Australia and New Zealand are two different countries? The mind boggles.

Ha, and Rinnai is a Japanese company anyway.

+Tommy Taylor lol

+oillio did you (idiot) just think this guy said New Zealand is in Australia?

It sounded as if he said, "New Zealand AND Australia."

Steven Carlsrud stop using hot water

Steven Carlsrud the noise means it’s working :D

+Robert Peasley Yes they do need power at all times, If there's no power you're supposed to open a faucet and let the water drain out, that goes with everything with plumbing though! Outdoor model water heaters have internal heaters that heat the system to freeze protect it, and indoor models don't, but the internal heaters does not protect that copper or plastic plumbing!

Does it make much sense for a company to warranty a product (such as this) all the way up to the end of it's expected life? Wouldn't that mean that roughly half (assuming a normal distribution) of the units would fail before the warranty expired (in this case 15 years)? Doesn't seem realistic - they would get killed. Car companies typically warranty for 75 - 100,000 miles, but we expect the car to go much longer than that. No, I have nothing to do with Rinnai.

OK, lets try to forget this obvious attempt at sales-training-gone-wild and forget this guy is pitching on-demand water heaters that MIGHT last 15-20 years or more. Lets say the on-demand water heater costs $3,000 (non-condensing) -$4,000 (Condensing) and the average consumption of 20 gpd to 62 gpd is employed. The average savings of a gas-fired on-demand water heater is about 37%. (23% on the low side and 55% on the high side.) That puts the annual gas savings between 42 to 95 therms. The annual savings costs would be between $42.00 to $121.00 per year. When you factor in the very high cost of installation the amount of time it would take for these things to pay for themselves, you would think "a wake-up call" would be in order for those pitching these things, and those who are catching a lot of industry hype. The best case for "payback" is about 21 years. The worst case would take about 71 years for these water heaters to pay for themselves. Please go to: “Actual Savings and Performance of Natural Gas Tankless Water Heaters” Read more: www.greenbuildingadvisor.com/blogs/dept/musings/are-tankless-water-heaters-waste-money#ixzz4EXdugnH0 Follow us: @gbadvisor on Twitter | GreenBuildingAdvisor on Facebook

Pete Sessa Point well taken and thanks for bringing that out. Good article. Seems like another waste of money for most users. I won't waste my time thinking about getting one. Thank you.

There are a pile of of Energy Saving road baloney ploys that have been used quite successfully over the years which amount to the same kind of net losses to the consumer. Replacement windows might be the next biggest fraud. Stating with the well-worn sales pitch that they will make you house more valuable. NO! They make your house more expensive. The value of you house is determine by the person buying it...No more. No less. Using objective data, field testing and depending how much someone spent on swallowing the latest sales gobblygook, it would take years and years the same amount of time to recoup the cost of new windows. I think there is an article I read that goes over this. I think it was called "Why energy saving tips suck." There are a pile of them too.

Pete Sessa Yeah it's amazing the money people pay for replacement windows. Vinyl siding too.