instant Hot Water

[JoyceI]

We love our new home in The Villages, but not a big fan of how long it takes the hot water to get from the water heater to the faucets. Does anyone have a recommendation for instant hot water?

[Bill32]

There was an article a while ago on installing a recirculation pump at the furthest hot water faucet. I would get in touch with a local plumber unless your very handy. Several articles and videos on the net.

[villagetinker]

There have been a few threads on this topic, along with a reference to a detailed article on total cost. I am not going to comment, just suggesting that you do some research before installing the recirculating system. Our shower takes exactly 30 seconds to get hot water, and about 2 gallons of water.

[EdFNJ]

We added a recirculation pump about 6 months ago and while the HW is not "instant" it is many times faster to all faucets. I bought the pump at Lowes (around $200) and installed it myself since plastic pipe is easy to work with and there was an electrical outlet near the HWH but there are "handymen" around who will do it or you can pay a plumber. You also need to install a small "mixer" under the furthest sink from the HWH. The only other way is to run another line (return line) from HWH to furthest sink which is pretty much impossible around here. The only downside is when you turn on the COLD water you get a couple seconds of WARM water through the cold side.

This kind of explains how it works: Quicker Hot Water With a Hot Water Recirculating System (https://www.thespruce.com/hot-water-recirculating-system-2719054)

[EdFNJ]

There have been a few threads on this topic, along with a reference to a detailed article on total cost. I am not going to comment, just suggesting that you do some research before installing the recirculating system. Our shower takes exactly 30 seconds to get hot water, and about 2 gallons of water.


Before I added our pump it was about 40 seconds for the water to get WARM and another few to get HOT in our shower. With the recirc pump it's 10-15 seconds until full HOT in same shower. Kitchen is just about instant now but was close to 30 sec before for HOT. Other problem was washer, when set to hot using the "hi efficiency" (minimal water) mode it never got hot since so little water was used. We would have to remember to run water FIRST in a nearby sink which was A PITA. Besides saving a little water it was just so annoying having to always wait for hot water. Never was used to that because we had tankless HWH up north (gas) and HW was virtually instant anywhere.

[photo1902]

Thank you for an actual review of a system you actually installed and use. I too am considering adding one to our home, and appreciate a real report rather than speculation and referrals.

[villagetinker]

Just a thought, I understand the newer homes have "instant/infinite hot water heaters' not the traditional 40 or 50 gallon hot water heater. I think that the recirculating system will work with the instant water heaters. It would be a good idea to check on this before installing.

[retiredguy123]

It doesn't seem to be worth the effort to me, just to save a little time. I turn on the shower while I am brushing my teeth.

[HiHoSteveO]

There have been a few threads on this topic, along with a reference to a detailed article on total cost. I am not going to comment, just suggesting that you do some research before installing the recirculating system. Our shower takes exactly 30 seconds to get hot water, and about 2 gallons of water.

I think this is the detailed cost article referred to.

Ask Pablo: Will a "Water-Saving" Hot Water Recirculation Pump Really Save Me Money? | TreeHugger (https://www.treehugger.com/clean-technology/ask-pablo-will-a-water-saving-hot-water-recirculation-pump-really-save-me-money.html)

[leftyf]

I installed the Watts pump. It worked great for about 1 1/2 years then just quit. The pump cost me $200 at Lowes. I installed it myself, so no cost there. It was only warrantied for 1 year. I have never replaced it because I feel it costs less to just pay for the water.

[retiredguy123]

If my calculation is correct, after paying the mandatory base cost for water and sewer, you can use a gallon of potable water for about 0.70 cents. That is less than a penny a gallon.

[CFrance]

If my calculation is correct, after paying the mandatory base cost for water and sewer, you can use a gallon of potable water for about 0.70 cents. That is less than a penny a gallon.
Huh? (I never was good at math...)

[retiredguy123]

If your shower head is legal, it can only put out 2.5 gallons per minute. So, running it for 30 seconds to get hot will only increase your water bill by about a penny.

[EdFNJ]

It doesn't seem to be worth the effort to me, just to save a little time. I turn on the shower while I am brushing my teeth.

It's not always for the few pennies (if any) cost savings of the water, or for saving the environment, for me it's simply for the convenience. We all do things that aren't REALLY necessary just for the "convenience factor" then rationalize it as being for the greater good of our planet. :) Nope, for me it was simply the convenience of not having to wait 40 seconds for hot water. :) :)

[EdFNJ]

I installed the Watts pump. It worked great for about 1 1/2 years then just quit. The pump cost me $200 at Lowes. I installed it myself, so no cost there. It was only warrantied for 1 year. I have never replaced it because I feel it costs less to just pay for the water.


Did the pump actually quit? Often (I have read, not yet experienced ) its just the mixer attached to the sink which is $10 on eBay.

[EdFNJ]

Just a thought, I understand the newer homes have "instant/infinite hot water heaters' not the traditional 40 or 50 gallon hot water heater. I think that the recirculating system will work with the instant water heaters. It would be a good idea to check on this before installing.



If you are referring to thankless water heaters (sometimes called instant) I doubt they would benefit from an external recirc pump as they (at least mine up north did) have that as part of the system.

[Dan9871]

Huh? (I never was good at math...)

0.70 cents (not $0.70) is 7/10ths of a penny per gallon... which is about a penny per gallon.

[biker1]

The rates are actually 0.21 to 0.42 cents per gallon depending on usage at my address. YMMV.

0.70 cents (not $0.70) is 7/10ths of a penny per gallon... which is about a penny per gallon.

[rjm1cc]

I have the circulating pump and a 40 gallon hot water heater. The pump has a timer and set the pump to come on in the morning and bedtime for a few minutes.
The pump pumps hot water to a return value hocked to the cold water line. The value would be at the sink that is farest from the hot water heater.

[Bay Kid]

I know I am a little anal, but I use a bucket to catch water in the tub until warm. About 2 gallons per bath. I use the water to water my plants each day. Problem solved.

[leftyf]

Did the pump actually quit? Often (I have read, not yet experienced ) its just the mixer attached to the sink which is $10 on eBay.

The pump actually quit. I took it apart and the impeller spun freely on the motor shaft. I contacted Watts, but they said it was over a year old and out of warranty. I don't feel that it saved me the $10.00 that it cost.

[CFrance]

I know I am a little anal, but I use a bucket to catch water in the tub until warm. About 2 gallons per bath. I use the water to water my plants each day. Problem solved.
:coolsmiley:
Dog's water from the day before into the rose bush every morning. Until it died! (the rose, not the dog.)

[VillageIdiots]

Just a thought, I understand the newer homes have "instant/infinite hot water heaters' not the traditional 40 or 50 gallon hot water heater. I think that the recirculating system will work with the instant water heaters. It would be a good idea to check on this before installing.

New homes in the Southern Oaks area have tankless (infinite) water heaters. Nice because they use gas instead of electric and only runs to heat water when you need it rather than maintaining a large tank of hot water at all times. It also creates extra storage space in the utility closet because of not having the big tank taking up space. I'm even starting to see them build those closets out with that space open all the way to the floor for even more extra space. However, there is nothing "instant" about the hot water. I haven't timed it but it takes a little time for the water to run hot in the master bathroom shower. My water bill seems reasonable to me and my assumption is that any extra water I am paying for isn't costing me as much as an electric water heater maintaining a finite tank of hot water until I need it. I usually start the shower and then do the things I might usually do after the shower (brush teeth for example) while I wait for it to get hot.

[EdFNJ]

I know I am a little anal, but I use a bucket to catch water in the tub until warm. About 2 gallons per bath. I use the water to water my plants each day. Problem solved.



Wowowowowowowwow! Now THAT is amazing dedication! :)

[village dreamer]

how about the energy wasted. when all that hot water is recirculating 24/7. the hot water will leave the tank at 100 degrees run through 100 feet of piping and return back to the tank at 80 degrees.

[Topspinmo]

I know I am a little anal, but I use a bucket to catch water in the tub until warm. About 2 gallons per bath. I use the water to water my plants each day. Problem solved.

Hello my anal brother :a040:

I just shut off the water when showering when I’m washing my face, shampooing my hair, and washing my body. This takes about 4 to 5 mins with the hot water running maybe 25 to 40 seconds. I am anal about order and time when showering (Which IMO saves a lot more water than bathing in tub in you’re own dirty water.) This saves more water IMO than the wait for hot water. I too sometimes gather water and water my tropical plants with it.

[EdFNJ]

how about the energy wasted. when all that hot water is recirculating 24/7. the hot water will leave the tank at 100 degrees run through 100 feet of piping and return back to the tank at 80 degrees.


There is a timer on it so if you want to you can set it to run during any specific hours of the day or night and you can save the dollar or 2 a month if that is what it is, but, speaking only for myself, I'm not using to save a buck or 2 but just for the convenience.

[DeanFL]

We have a watts pump with timer (on at 7am, off at 11pm). It's one of those little things in life that is not a necessity but really nice to have, and a small price to pay for comfort (esp hers...). Nothing like turning on any faucet and -really- one second later, warm/hot water. Have had it for over 3 years with 0 issues. When traveling we simply unplug it.

[Henryk]

If your shower head is legal, it can only put out 2.5 gallons per minute. So, running it for 30 seconds to get hot will only increase your water bill by about a penny.

I don’t understand your comment. Legal? Kindly elaborate.

[Henryk]

If you are referring to thankless water heaters (sometimes called instant) I doubt they would benefit from an external recirc pump as they (at least mine up north did) have that as part of the system.

I always disliked thankless water heaters. :ho:

[retiredguy123]

I don’t understand your comment. Legal? Kindly elaborate.
Federal law mandates that shower heads manufactured in the United States cannot output more than 2.5 gallons of water per minute. There are also Federal mandates for faucets and toilets. Believe it or not, there is actually a black market for illegal toilets.

[EdFNJ]

Federal law mandates that shower heads manufactured in the United States cannot output more than 2.5 gallons of water per minute. There are also Federal mandates for faucets and toilets. Believe it or not, there is actually a black market for illegal toilets. True, but federal law doesn't forbid you from removing the tiny little "water saver" washer in the shower head in fact many even include instructions on how to do just that. Modifying most toilets is just as simple for a "super flush."

[EdFNJ]

I always disliked thankless water heaters. :ho:


That's one of the things I miss most down here since we have electric HW and no gas. The electric versions are terrible I'm told and need multiple electric lines run.

[retiredguy123]

True, but federal law doesn't forbid you from removing the tiny little "water saver" washer in the shower head in fact many even include instructions on how to do just that. Modifying most toilets is just as simple for a "super flush."
The newer shower heads can be modified to allow more flow, but I think it is a little more difficult than just removing a washer. Usually, you need to drill out the restrictor hole. Not that I would ever do that. But, where there is a will, there is a way.

[Bay Kid]

Hello my anal brother :a040:

I just shut off the water when showering when I’m washing my face, shampooing my hair, and washing my body. This takes about 4 to 5 mins with the hot water running maybe 25 to 40 seconds. I am anal about order and time when showering (Which IMO saves a lot more water than bathing in tub in you’re own dirty water.) This saves more water IMO than the wait for hot water. I too sometimes gather water and water my tropical plants with it.

I was raised and live in the country. We always conserve our delicious well water. I am right there with you.

[EdFNJ]

The newer shower heads can be modified to allow more flow, but I think it is a little more difficult than just removing a washer. Usually, you need to drill out the restrictor hole. Not that I would ever do that. But, where there is a will, there is a way. I can't speak for "all" but the 3 I have handled over the last year all had washers (well, not really a washer but a rubber edged disk with metal in the middle and a tiny hole) that you pop out. The 2 my sister just got which were very expensive "decorator" models were the same. They made a very noticeable difference in water volume/pressure from the shower head.
Sometimes you think you need to drill them out but if you take a small sharp pointed drywall screw and screw it into the restrictor hole 1 turn then yank on it it pops out without needing to drill.

[retiredguy123]

I can't speak for "all" but the 3 I have handled over the last year all had washers (well, not really a washer but a rubber edged disk with metal in the middle and a tiny hole) that you pop out. The 2 my sister just got which were very expensive "decorator" models were the same. They made a very noticeable difference in water volume/pressure from the shower head.
Sometimes you think you need to drill them out but if you take a small sharp pointed drywall screw and screw it into the restrictor hole 1 turn then yank on it it pops out without needing to drill.
Thanks. But, actually, I'm pretty satisfied with the cheap, legal shower head that the builder installed. And, I shower every week, whether I need to or not. I think that the Federal law has worked because the newer shower heads and toilets seem to be designed to function better than ever, especially when you have good water pressure.

[sdyor]

Just to be aware. I had a recirculating pump installed years ago and eventually the return mixer valve clogged up and the pump kept trying to pump water. Long story short the hot water line burst at an elbow in a closet wall and flooded closet, spare bedroom and garage. Luckily friends happened to check the house that day, as we were away. Shut off water from hot water tank before we had 60 gallons of warm water (tank set to low while away) over whole house. Cut short our Xmas visit with family

[EdFNJ]

Thanks. But, actually, I'm pretty satisfied with the cheap, legal shower head that the builder installed. And, I shower every week, whether I need to or not. I think that the Federal law has worked because the newer shower heads and toilets seem to be designed to function better than ever, especially when you have good water pressure.


:1rotfl: If you showered more than once a week you might think differently :1rotfl:

[EdFNJ]

Just to be aware. I had a recirculating pump installed years ago and eventually the return mixer valve clogged up and the pump kept trying to pump water. Long story short the hot water line burst at an elbow in a closet wall and flooded closet, spare bedroom and garage. Luckily friends happened to check the house that day, as we were away. Shut off water from hot water tank before we had 60 gallons of warm water (tank set to low while away) over whole house. Cut short our Xmas visit with family


Yikes, I have read about the mixers clogging but never heard of a pipe explosion because of it! Maybe a poor "glue job" on that elbow contributed to it? Can't imagine that much pressure being present to cause that to burst. I will make sure I turn off pump when we travel regardless.

[Jcm80]

I just installed a Watts recirculating pump. My house (Aspen) was very slow in shower and kitchen to get hot water. Sometimes up to 60 to 90 seconds. VERY easy to install (had friend with experience with Sharkbite fittings) and set up.

Seems to work very well. Hot water in kitchen about 5 seconds now. Has timer to turn off at night. You can also install additional pressure valves on more sinks if you think you need it faster on those sinks.

So far very happy

JM

[SouthOfTheBorder]

Just to be aware. I had a recirculating pump installed years ago and eventually the return mixer valve clogged up and the pump kept trying to pump water. Long story short the hot water line burst at an elbow in a closet wall and flooded closet, spare bedroom and garage. Luckily friends happened to check the house that day, as we were away. Shut off water from hot water tank before we had 60 gallons of warm water (tank set to low while away) over whole house. Cut short our Xmas visit with family

Bummer situation... that could have been a lot more of a problem for you. :$:



W turned off our recirculating pump when gone for more than a couple of days.

Normally these type of pumps have a timer that controls the various times of day that it recirculates. It is easy to change or shut off. Otherwise your are re-heating water that is not going to be used.

[villagerjack]

Life is good no matter how long it takes to get hot water. Actually I never gave it much thought.

[EdFNJ]

Life is good no matter how long it takes to get hot water. Actually I never gave it much thought. For some of us life is BETTER than good with faster hot water! :D :D :D

[Bill32]

I believe the pumps used are " circulator" pumps not "pressure" pumps, shouldn't increase the pressure in the system much if any...

[tjlee500]

Doesn't bother me at all. I just changed my routine. I brush my teeth, clean toilet get ready and then I have nice hot water. I had electric stove for many years but now I am getting use to gas. Didn't get a whole house water filter either. I don't feel it is needed. I drink water from the refrig with filter. I am much more concerned about the quarry blasting at Fenney which shakes my home, lack of recycling and the wait to get stores, golf paths and some restaurants. That will all come, I hope.

[centralillinois]

I added a circulating pump (mounts on top of the water heater) to get hot water quicker. You can set the timer for the times you normally use more hot water. I used Anthony Torri Plumbing (352-352-330-5900). Cost was $650.

[Agape.Dee]

I’ve been living in The Villages for about 15 months. There is a group called “DIY” (Do It Yourself) that meets the third Wednesday of every month at Bradenton at 6 PM. They help you to deal with any issues that you may be able to even do yourself. As villager you are welcome to attend and bring any expertise to the table, as well as problems.

[Akmoorfamily]

Have had the same question. Seems like incredible quantities of water are wasted city wide. Maybe a builder could educate us. I have assumed they run the pipes under the house in the cool ground and don’t insulate them. If they ran them in the attic it seems the water would at least be warm and if they insulated those. Solutions might be installing a continuously circulating hot water loop like they have in multiple apt. units. Or maybe an instant hot water unit under the sink. For the cost of a little pipe insulation I suspect they are wasting a great amount is costly water.

[OhioBuckeye]

You know this is one thing I don't like about TV. When they build homes here they do the very minimal & we pay top dollar for our homes. I don't know where everyone else is from but you would think the builders here would know by now that this is an issue. They keep telling us that water in Florida is getting very minimal & water isn't cheap here. I run my water in my shower for 1min. 45 sec. to 2 min. to get hot water. I bet there's more people here than not that run the water as long as I do & TV keep telling us don't waste water. To me to buy a circulating pump for $200. dollars then have a plumber come in & install it, I bet you would have close to $300. in it. To me the builders should build a home that you wouldn't have to do this. You would think they could figure a way to get the hot water heater more in the middle of the house our they should install these $200. circulating pumps in, because I sure they could install them for half the price or less. I know a lot of people won't agree with me but it just seems like they don't do any more to a home than the minimum to sell them at top dollar. Sorry to be so negitive!

[davem4616]

The wait for hot water at the kitchen was certainly a surprise. Master bath shower is really close to the hot water tank so, not really an issue there.

The work around for us is we fill the bucket that we use to water the indoor plants before we wash dishes by hand or starting up the dishwasher.

We've had quotes from 1 plumber and an electrician...$700 +/- for the complete job

[stadtmkw]

Have been running a Grundfos recirculating pump for about six months. We do get hot water sooner to some of the faucets. Aside from the small electrical cost of running the pump there is another downside to these systems. We already have a cold water problem in the summer months. You don't get cold water you get luke-warm water coming in to the house. These pumps make the problem even worse because they circulate hot water from the water heater through the cold water lines.

[DReifinger]

When we moved into our home, the previous owner already had an instant hot water spigot installed next to the faucet of our kitchen sink. Can I say I LOVE, LOVE, LOVE this! I can't imagine not having it and waiting for the hot water. It appears to be a very simple fix.

[DReifinger]

When we moved into our home, the previous owner already had an instant hot water spigot installed next to the faucet of our kitchen sink. Can I say I LOVE, LOVE, LOVE this! I can't imagine not having it and waiting for the hot water. It appears to be a very simple fix.

[amexsbow]

I have the Watts pump on my hot water heater in the garage. I plugged it into a Wemo outlet switch. Now I can tell Alexa or Google to turn the pump on before I go into the bathroom and a minute later I have hot water and I tell Alexa to turn the pump off. The pump never runs more than a few minutes.

[clasyldynpa]

Off topic but we too have just moved to TV's from Allentown, Pa

[EdFNJ]

The wait for hot water at the kitchen was certainly a surprise. Master bath shower is really close to the hot water tank so, not really an issue there.

The work around for us is we fill the bucket that we use to water the indoor plants before we wash dishes by hand or starting up the dishwasher.

We've had quotes from 1 plumber and an electrician...$700 +/- for the complete job
$700 ! Yikes! The unit is $200 and (assuming you have an electrical outlet nearby) takes maybe 45 mins to install. There is a local guy who posts on "Nextdoor" who charges $125 to install a recirc pump (he did my sisters). I don't have his name handy but if you need it I can look it up. I assume you don't have a nearby outlet since you mentioned "electrician."

[coffeebean]

It doesn't seem to be worth the effort to me, just to save a little time. I turn on the shower while I am brushing my teeth.
Water is a precious natural resource and you are letting it go down the drain with no purpose. /What a waste of perfectly good water!

[coffeebean]

I installed the Watts pump. It worked great for about 1 1/2 years then just quit. The pump cost me $200 at Lowes. I installed it myself, so no cost there. It was only warrantied for 1 year. I have never replaced it because I feel it costs less to just pay for the water.

The Watts circulating pump was already installed when we purchased our home. We have the kitchen faucet and the hall bathroom connected to the pump. We set the pump on a timer to come on at 6am and go off at 10pm. Works great.

The hall bathroom which is the furthest from the water heater would need a minute for the water to get warm then an additional 10 seconds to get full hot. That is just too much time wasted and certainly too much water wasted. Now the water is instant warm and only 10 seconds to full hot.

The way the Watts system works is that now it takes lots of time for the water to get full cold. That is the only draw back to the system.

Warning: DO NOT TURN OFF MAIN WATER WITHOUT TURNING OFF THE WATTS CIRCULATING PUMP! The pump is "lubricated" with water going through it. Without the water going through it, the internal parts burn up. We learned the hard way. We did replace the pump because we love the instant warm water at the two faucets furthest from the water heater.

[coffeebean]

how about the energy wasted. when all that hot water is recirculating 24/7. the hot water will leave the tank at 100 degrees run through 100 feet of piping and return back to the tank at 80 degrees.

I was informed by our plumber that it is pennies worth of electric to run the Watts circulating pump, even on the two faucets in the house.

[coffeebean]

When traveling we simply unplug it.

When traveling, rather than unplugging the pump, we just turn the dial to OFF. That way, the clock is the correct time when we return home from traveling. No need to reset the clock.

[coffeebean]

I don’t understand your comment. Legal? Kindly elaborate.

Removing the water restrictor will render the faucet or shower head "illegal". I say who is going to know? We removed the restrictor in our shower head in our NJ home. That made all the difference in the world for water pressure in the shower.

I think the faucets manufactured today locate water restrictors that are not accessible to the home owner but I may be wrong about that.

[ohiosbestus]

This is what we found out when we moved into our new home. We turned on the shower at what we thought was the appropriate temperature, but like your's it took forever to get warm water. What we found out on ours to make it much faster,we turned the hot water on in the shower full blast at first, and it took hardly anytime to get through the lines,then we adjusted it to fit our desired temperature.

Note to this is we have a very big massaging shower head so we don't know if that makes any difference or not about the pressure or not.

[xcaligirl]

There isn't an electrical outlet near our HWH or I would definitely have one. It takes a very long time to get hot water in our house. We had it in CA and loved it. Water was expensive in CA and it really cut costs.

[DeanFL]

When traveling, rather than unplugging the pump, we just turn the dial to OFF. That way, the clock is the correct time when we return home from traveling. No need to reset the clock.

CB,

Guess that means that I'm OFFICIALLY old-fashioned, and turned into my father...

I have a checklist in the laundry room for things to do to the house when gone for a few days or more, including unplugging the clothes washer, turning off the water valves to it, unplugging toaster oven, turning off HW heater circuit breaker, and unplugging the HW recirc pump - plus about 8 other tasks.

BTW re the required outlet near the WH to install the recirc pump - I installed an outlet for our pump and just did a neighbors. Less than $20 of materials, and easy to pick off the AC from the attic pull light source - takes less than an hour (in Designer house anyway) - the plumber will not do that elec job; needs to be done B4 pump install.

[coffeebean]

I will make sure I turn off pump when we travel regardless.


When we travel, we always turn off the main water. As I said in another post, we also turn off the circulation pump.

[coffeebean]

The wait for hot water at the kitchen was certainly a surprise. Master bath shower is really close to the hot water tank so, not really an issue there.

The work around for us is we fill the bucket that we use to water the indoor plants before we wash dishes by hand or starting up the dishwasher.

We've had quotes from 1 plumber and an electrician...$700 +/- for the complete job

What complete job?

[villagetinker]

Off topic but we too have just moved to TV's from Allentown, Pa

Sent you a PM.

[sallybowron]

There have been a few threads on this topic, along with a reference to a detailed article on total cost. I am not going to comment, just suggesting that you do some research before installing the recirculating system. Our shower takes exactly 30 seconds to get hot water, and about 2 gallons of water.

Can I come take showers at your house Tink?:pray:

[villagetinker]

Can I come take showers at your house Tink?:pray:

I think my wife would have something to say about that............

But as noted in another post, I turn on the hot water full, stand just outside the initially cold water, and as soon as I feel it start to get warm, I move the control to the normal temperature, and in 5 seconds I am in the shower.

[Topspinmo]

I was raised and live in the country. We always conserve our delicious well water. I am right there with you.

I also was raised in country by my grandparents. We didn’t have hot water only to kitchen sink. For years all they had was well and cistern rain water collection. Finely when I was about 10 city water was ran close enough to connect. Thought we were in heaven not having to worry about running out of water.

[Bfeiner]

The installation is not complicated. installation of the Bosch Model ES2.5, 2.5 Gallon mini tank hot water heater I installed for my kitchen sink. Your under sink conditions should be similar but might require a minor variation. I placed the heater inside a plastic tote that I cut down to use as a leak containment in the event of a minor drip. This type mini tank heater has a pressure relief valve that I connected with a flexible hose into a one gallon plastic container under the sink in the event the relief valve opens. The water temperature setting of the heater is adjustable, however for longer duration use of hot water, there will be some temperature reduction after about 30-45 seconds caused by dilution with the colder water stagnant in the pipes (from the hot supply) entering the heater. The temperature will soon increase again when the hot water supplied from the whole house tankless heater flows through the pipes into the Bosch mini tank heater then to the sink faucet.

This installation can also be duplicated under sink at the master bathroom for sink(s) only if space allows, an outlet for power would also have to be installed to power the heater.

[Ron5734]

In Desoto. One of new homes with 'instant-tankless-water heater'.
Village design engineers messed up on this realy bad.
Tankless heater is located at far end of garage. As far away as possible from any hot water usage. This location adds 15-20 feet of extra pipe to heat compared to those that have a Hot water tank.
The heater is also locked down to 120 degrees.
Hot water in resonable time is only a dream.
Also a recirculating pump would kill the efficiency design of a 'instant heat system'.
Only help I can see is:
1 raising the locked down temp to 130 or 140.
Install additional 'instant heat units inside house at needed locations.