Question about Rinnai Toyostove Direct Vent Heater: Laser 30 Toyostove Direct Vent Heater Shipping

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RInnai Water Heater

Is there a way to get hot water faster? It seems to use a lot of water (3+ gal) to get hot in the kitchen which is maybe 15 feet from the unit.

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  • Holly Brown Nov 16, 2008

    my rinnai tankless water heater is flashing code 12. Know what i can do?

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My rinnai water heater is not working...error code "12" is flashing. Any idea what I am to do?

Posted on Jun 21, 2008

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The only way that I have found to work is to place a small electric water heater close to the point of use. Yes this does defeat some of the efficiency of having a tankless water heater but if you figure electric rates are now cheaper than gas rates in some areas, it may save you money.

Another alternative is to put a domestic circulator in-line and recirc the domestic water either all the time or install a timer.

None of these options are "low-buck" options.

15' of 1/2" copper holds less than 1 gallon of water so something is wrong with the heater if it takes 3 gallons to get hot water to the faucet.

Posted on May 29, 2008

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1 Answer

No hot water from kitchen tap


The hot side of the faucet is most likely plugged with something that came up thru the water system. The average thankless waterheater requires at least 1/2 to 3/4 gpm flow rate for the unit to sense flow and turn on. If there is not enough flow it will not fire and heat the water. Not sure about this particular unit but a few require at least one full gallon per minute flow. So chances are that if you fix the faucet, you fix the hot water issue at the same time

Jan 09, 2014 | Rinnai Water Heaters

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Water temperature fluctuates with tankless


Have you ever tried to pump water for a fountain... It is so tough and you need larger and larger pumps to get it to go 7 feet high to let's say 10 feet high. Having the on demand water heater in the attic dramatically drops it's pressure. It's best to feed it with a 1 inch or at least 3/4 inch pipe downstairs before it splits the hot and the cold to get the best pressure everywhere then the least pressure will be when it reaches the 2nd floor. but the heater won't cut out because the pressure it even greater downstairs.

Nov 30, 2013 | Rinnai Water Heaters

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I have a 640dors reliance capacity40 water won't stay hot long(electric)


remove the two covers one high and one low and set the temp higher. This time of year with colder water comming in the house the water heater has to work harder to raise the temp of the incomming water. In the summer the incommong water is much warmer. 40 gal is a small water heater and you will only get about 15 gal of hot water with the ice cold water entering the water heater as you use the hot water. You can get a bigger water heater. even better is to go tankless and a have never ending hot water and save money at the same time.

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Hello, I recently had a Rinnai tankless water heater installed. The old water heater was in the garage. The new tankless heater is installed outside, and is about 25 feet away from where the old one...


I agree with you. The foam insulation should only be on the Hot Water side. The cold water side doesn't make any difference, as that temperature rarely changes in California.

Hope this helped you AK, thanks for choosing FixYa.

Aug 10, 2011 | Heating & Cooling

1 Answer

I have a quote from a contractor to install a Rinnai R75 tankless water heater. The heater normally requires 3/4 piping. My home has 1/2" piping. The contractor says 3/4" is better but 1/2"...


There are advantages and disadvantages to both pipe sizes. Typically, most houses utilize 3/4 inch or larger to supply high volume circuits like the circuit from the meter (or well) to the hot water heater, outside spigot, or water softener. Distribution from water heaters is usually 3/4 for the main branch but this is reduced for the runs to the sink, dishwasher, washing maching. The reason for reducing the size is to reduce the volume of water in the tube or to reduce the amount of cold water you run down the drain before it turns hot.
Since your house seems to have 1/2 inch supply to the current water heater, I would suggest staying with the current size. The option is to enlarge the tubing from supply to distribution which can be a major plumbing task. If your current water pressure (at the faucet) is ok, then go with what you have.

Jan 31, 2011 | Kitchen Ranges

2 Answers

I have a Rinnai tankless gas water heater and this things beeping and flashing 12 everytime we turn on the hot water the water will get hot but you have to wait for it to stop beeping


Error 12 is failed ignition - this can be caused by many things, but normally a low gas pressure, or no gas pressure upon ignition.
Try turning the hot tap on very slowly till till the control shows burner is lit. Then turn it on faster. If it stays going with no error, you might have a faulty regulator, not opening fast enough to meet demand. Especially common with lpg models,a lot rarer on natural gas.

Oct 27, 2009 | Rinnai Water Heaters

1 Answer

Tankless on demand water heater.


Tankless water heaters normally take a little longer than a regular heater to provide hot water because they have to start and get warmed up. I'm guessing the heater uses a pilot light and that the short amount of hot water when you turn on the tap is hot because when the water is sitting still in the heater the heat from the pilot light is enough to get it hot. The tub faucet will get hot a lot faster than the shower because it lets a lot more water through and empties out the pipes faster than the shower. You could probably speed things up by letting the tub faucet run on completely hot for like 10-15 seconds and then turning on the shower.

Oct 24, 2009 | RTO Takagi Jr. TK-JR-N Tankless Water...

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Our second unit just failed and needs a new controller more money


The only Bosch tankless I have ever touched have been the 3 I have taken out and replaced with Rinnai. I think Bosch/Paloma/etc. have two problems:

1. They do not properly certify technicians before allowing them to install these units.

2. Their product is mediocre at best.

The biggest problem I've seen is that people don't vent them properly. The last one I pulled out had a combined vent length of 55'. 55 FEET! Absurd!
The units was condensing so much inside the vent that it washed out 2 gas control valves in ONE YEAR.

Buy Rinnai, buy Takagi, buy Noritz....maybe even a Navien (new player...time will tell)
+
Factory certified technicians, preferably equipped to do the gas & plumbing without having to sub it out.
=
Years of trouble-free hot water.

Good Luck.

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No hot water - Rinnai tankless hot water heater


sounds like the water line is frozen before it gets to heater. You can take a blow dryer and try to thaw the line.You should be able to hook up a hose on the hot side of water heater. turn valve off so it wont flow into house.You can turn on hot water valve on in kitchen but you will have to thaw cold and hot line. Make sure you know where water shut off is to the house just in case a line breaks.

Jan 16, 2009 | Rinnai Toyostove Direct Vent Heater: Laser...

1 Answer

We have installed a rinnai water heater in the basement. Since it takes a little time before the hot water arrives in the kitchen or upstairs in the shower, we are wasting qite a bit of potable water every...


The only way to reduce water waste would be to have a plumber install smaller pipes coming from the water heater to each individual point of use. The normal way of plumbing a house uses a large pipe that has smaller pipes that go to each sink, tub, shower, etc. The larger the pipe, the more water is in it and the longer it will take to get hot water to where it is going. An electric tank won't save you from wasting any water unless you have a separate hot water circulation system installed. This would keep the hot water drawn out to the far ends of the plumbing system and allow the hot water to reach it's destination alot sooner. However, keeping a tank full of water hot is not economical and a circulation system basically turns your pipes into a radiator causing you to waste electricity. I know it may seem that you are wasting alot of water waiting for the hot water to get there, but in the long run you and the environment are coming out ahead due to the saved energy and efficiency of the Rinnai unit. Also just in case you were thinking of it, a circulating system is not compatible with a Rinnai water heater.

Jun 19, 2008 | Rinnai Heating & Cooling

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