Tank Volume vs. GPM - I was under impression that tankless water heaters did not "hold" water, they only heated it on demand as it flows through??
841137
I've had one for about 10 years in a studio apartment with low flow shower. A person can take an 8-10 shower before the water starts to go cold but the setting on the tank was set at maximum ie. around 140 degrees which is very hot and if one is not careful can scald. So upping the temperature is a way to get the most out of a small heater. I only have 120v so I am limited by that. I would prefer a tankless but don't have the 240v that is really required.
841138
The GL6 is not a tankless water heater, it is a small (under the sink) type 6 gallon water heater. It is okay for a vanity sink that runs at about 1/2 gal per minute, not so good for a shower that uses up water at the rate of 1.5 to 2 gpm. I have an apt. complex that I installed 5 Bosch Powerstar tankless water heaters 3.5 years ago. Nothing but trouble. In the last two weeks I have had to replace three of them. This time with Stiebel Eltrons (Tempra 20 and 20 +) and the tenants are much happier. Bosch no longer sells their parts. House Needs sells them with NO Refunds after purchase. That should tell you they don't even trust those tankless heaters by Bosch. Enough said.
841139
The GL6 is not a tankless water heater, it is a small (under the sink) type 6 gallon water heater. It is okay for a vanity sink that runs at about 1/2 gal per minute, not so good for a shower that uses up water at the rate of 1.5 to 2 gpm. I have an apt. complex that I installed 5 Bosch Powerstar tankless water heaters 3.5 years ago. Nothing but trouble. In the last two weeks I have had to replace three of them. This time with Stiebel Eltrons (Tempra 20 and 20 +) and the tenants are much happier. Bosch no longer sells their parts. House Needs sells them with NO Refunds after purchase. That should tell you they don't even trust those tankless heaters by Bosch. Enough said. The GL6 is not a tankless water heater, it is a small (under the sink) type 6 gallon water heater. It is okay for a vanity sink that runs at about 1/2 gal per minute, not so good for a shower that uses up water at the rate of 1.5 to 2 gpm. I have an apt. complex that I installed 5 Bosch Powerstar tankless water heaters 3.5 years ago. Nothing but trouble. In the last two weeks I have had to replace three of them. This time with Stiebel Eltrons (Tempra 20 and 20 +) and the tenants are much happier. Bosch no longer sells their parts. House Needs sells them with NO Refunds after purchase. That... » Read More The GL6 is not a tankless water heater, it is a small (under the sink) type 6 gallon water heater. It is okay for a vanity sink that runs at about 1/2 gal per minute, not so good for a shower that uses up water at the rate of 1.5 to 2 gpm. I have an apt. complex that I installed 5 Bosch Powerstar tankless water heaters 3.5 years ago. Nothing but trouble. In the last two weeks I have had to replace three of them. This time with Stiebel Eltrons (Tempra 20 and 20 +) and the tenants are much happier. Bosch no longer sells their parts. House Needs sells them with NO Refunds after purchase. That should tell you they don't even trust those tankless heaters by Bosch. Enough said. « Show Less
354197
Hello Raz, Thank you for your question. I am replying in less than one hour, after business hours, to expedite your request. Actually it does not matter how many bathrooms your home has. What matters is how many points of use that you will use at the same time. So to determine whether this or any tankless heater will work, just add up the total water flow rate in gallons per minute ("GPM") of all your points of use. A shower flow rate can range from 1.5 to 2.5 GPM. A bathroom sink: 0.75 GPM. A clothes washer: 3 to 4 GPM. So, if you expect only to have one shower and one sink running at the same time, this will give you at least 105F hot water, if your incoming cold water temp is above about 55F. Please let me know if I can assist you further. Kind Regards, Ross Kelson GadgetsGo P.S. If you have found my answer helpful, please prefer us when you purchase. You will continue to get priceless service after the sale.
1440875
I don't know, but the idea of a tankless is to have hot water on demand and not have to keep it heated. Since it's electric you would be using it all the time. I think this would be very expensive since it uses quite a bit of electricity (I think mine has about 6 fuses). Also, they are more "fragile" than a regular water heater; they don't hold up well with considerable use due to scaling and other circumstances. I wouldn't advise it.
169360
we have an electric tank less that is rated at 4.5 GPM. We have very hard water in this part of MA and also have a well. We have been in this house for 30 years and have had problems with pipes rotting away. When we installed the electric tank less we installed this filter also. We used the heater for a few months and than had the plumber perform the maintenance suggested by the tank less mfg. It was clean as a whistle. Our flow rate is not as high as yours but if you had one in line with each heater - i would think it would work fine. Our heater used 120A for 4.5 GPM - if yours is electric it most use a lot of power! For our use I am very satisfied with the filter and given our water quality situation and how clean the heater was - i would highly recommend this filter. KR in MA
174093
They fill from the bottom so you can't use a hose. I didn't ever get to use this Humidifier (see my review). You would have to take each tank and fill it. The entire unit does not hold 9 gallons of water. Instead that 9 gallon number is the maximum output of the unit per day with multiple refills.
1117472
Tankless water heaters will handle almost anything, but the trick is sequencing / timing. If all three teenagers are going to take baths or showers at one time, it may not provide enough hot water. To some extent this will depend on the size and length of your water lines. I bought one of the to heat my hot tub and two larger, 9.5 gpm units; one for domestic hot water and the other for radiant floor heat. They all work great. The price does seem to vary so keep an eye on the prices over time. The PVC vent system is much better and extremely lower in cost than those tankless water heaters that require stainless steel vent pipes. Good luck. Tankless water heaters will handle almost anything, but the trick is sequencing / timing. If all three teenagers are going to take baths or showers at one time, it may not provide enough hot water. To some extent this will depend on the size and length of your water lines. I bought one of the to heat my hot tub and two larger, 9.5 gpm units; one for domestic hot water and the other for radiant floor heat. They all work great. The price does seem to vary so keep an eye on the prices over time. The PVC vent system is much better and extremely lower in cost than those tankless water heaters... » Read More Tankless water heaters will handle almost anything, but the trick is sequencing / timing. If all three teenagers are going to take baths or showers at one time, it may not provide enough hot water. To some extent this will depend on the size and length of your water lines. I bought one of the to heat my hot tub and two larger, 9.5 gpm units; one for domestic hot water and the other for radiant floor heat. They all work great. The price does seem to vary so keep an eye on the prices over time. The PVC vent system is much better and extremely lower in cost than those tankless water heaters that require stainless steel vent pipes. Good luck. « Show Less
658068
No, I was pleasantly surprised that the tankless does not have more cold water delay or breakthroughs than the old fashioned tank heater. The old tank heater gave me a lot more problems with cold water running out. The tankless is much better from a comfort perspective and a lot more accurate in maintaining the water temp with multiple users at the same time.
67959
Hello Thomas, Thank you for your inquiry. This is what we recommend. We generally recommend that on average, you turn over your aquarium volume four times per hour. This means that if you have a 30 gallon tank, you need a pump and filter with flow rates of around 120 gph. so if your tank is 120 gallons then a 480 gph. This is a suggestion of course. We hope that you have found this answer helpful. Thank you, Gabriela
1518000
I do not think that this valve will give you the required flow while hot water is not being used. It is designed to work in series with the Watts circulating pump and as such I do not think that it will have any effect in a tank-less hot water system.
1326541
Hello, I was just checking Navien prices and saw this question and the answers. I do have to take issue with the answers concerning regular maintenance and water quality. With all tankless water heaters you need to know some things about your water, even if you are on city water. Hardness can have a very detrimental effect on tankless heaters if not treated. They are much more sensitive to scale buildup than the tank style heaters. You should check with your water supplier about the hardness of the water. If you are on well water a full domestic suitability test should be done. Not doing these could void your warranty. Hello, I was just checking Navien prices and saw this question and the answers. I do have to take issue with the answers concerning regular maintenance and water quality. With all tankless water heaters you need to know some things about your water, even if you are on city water. Hardness can have a very detrimental effect on tankless heaters if not treated. They are much more sensitive to scale buildup than the tank style heaters. You should check with your water supplier about the hardness of the water. If you are on well water a full domestic suitability test should be done. Not doing... » Read More Hello, I was just checking Navien prices and saw this question and the answers. I do have to take issue with the answers concerning regular maintenance and water quality. With all tankless water heaters you need to know some things about your water, even if you are on city water. Hardness can have a very detrimental effect on tankless heaters if not treated. They are much more sensitive to scale buildup than the tank style heaters. You should check with your water supplier about the hardness of the water. If you are on well water a full domestic suitability test should be done. Not doing these could void your warranty. « Show Less
1501526
It certainly is greater flow rate than the replaced manual unit. I don't a have numerical GPM.
1636231
Another installation idea some have used is to install the tankless heater "downstream" of their main tank water heater and turn off the tank heater. The water entering your house gets a chance to stabilize in temperature in the tank before entering the tankless heater and if the tankless heater breaks, just turn it off and turn back on the tank heater until you can get the tankless repaired. At least you won't be stuck without hot water at the last minute when everyone is trying to get ready for school/work/church and you can then repair the tankless when it's convenient
367519
Measured 1 gallon in 30 seconds = 2.0 gpm. I think my pressure is fairly high. Hot water did last longer than the old 2.5 gpm head which actually used 2.6 gpm.
1974443
We've been using this shower head for some time now and just installed a hybrid water heater and I don't see much difference at all in the pressure. Can't speak about the tankless type, though.
650273
The hot water that it outputs depends on the hot water that is needed. If one is taking a shower at 2 GPM, he will get 2 GPM out of the water heater, as long as the maximal heating capacity is not reached. The hotter the input water, the higher the maximum flow rate will be (up to the capacity of the pipes). The question is linked with the minimal flow rate of 0.26 GPM this unit has. Below this, the water heater shuts off. 1. What happens if I need 1 GPM at 120F and that my input is at 115F. Will it shut off or will it output water above 120F ? 2. Shouldn't the minimal flow rate be expressed based on the temperature rise (0.26GPM at 50 degrees rise, 0.52 GPM at 25 degrees rise, 2.6 GPM at 5 degrees rise) ?
1326544
No, Not necessarily. Unless your home is on a well water service. For the most part all tankless water heaters are designed to be maintenance free.
1142020
You just need a constant supply of water to the heater whether it comes from the on-demand water pump or some other constant source of water. Make sure the tank is full of water before turning it on.