User Posts: stylishwebs
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Best Tankless Propane Water Heaters for 2 or 3 Bathrooms
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Choosing the correct tankless water heater propane system for your 3-bathroom living space just takes an honest view of the actual water usage you will have. ...

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Best Tankless Propane Water Heaters for 2 or 3 Bathrooms
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Choosing the correct tankless water heater propane system for your 3-bathroom living space just takes an honest view of actual water usage you will have. The ...

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Rheem RTG-84XLN Outdoor Natural Gas Tankless Water Heater Review
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The perfect Rheem outdoor natural gas tankless water heater that comes with a mid-range price tagIf you're buying a tankless water heater for the first time, ...

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What are the Best Tankless Water Heater Brands?
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If you're into researching about a tankless water heater,check out my guide on the best tankless water heater brands of 2017.

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Best Propane Tankless Water Heaters:  Top Picks
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A brief guide to some of the best propane tankless water heaters.Some tankless water heaters are better than others. Here's a quick guide to some of the ...

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Rinnai RUR98iP (Propane) & RUR98iN (NG) Indoor Tankless Water Heater with Recirculation Review
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SpecsFirst things first: let's talk about the numbers you'll enjoy with the RUR98 (Propane or Natural Gas).Check Price for Propane unitCheck Price for ...

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3 Tankless Water Heater Myths (plus 3 Compelling Reasons to Go Tankless)
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The following is an edited transcript of Matt Risinger's video blog: 3 Tankless Water Heater Myths.Are you shopping for a new water heater? Thinking about ...

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Rheem RTEX 11 & RTEX 13 Reviews (Best Point-of-Use Models)
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The most affordable tankless water heater that fits in your budget. These two are beginner models that come in 2.68 & 3.17 GPM flow rates. Some brands are ...

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Best Marey Tankless Water Heater Reviews
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"Marey...has been delivering innovative hot water solutions over the past 60 years." Puerto Rican entrepreneur, Mariano Reyes, founded Marey in 1955 (the ...

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Instant Hot Water – Recirculating Pumps
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The Myth of Instant Hot Water with a Tankless Water Heater Many refer to tankless water heaters as “instant” water heaters. As water comes in to the unit, it ...

User Deals: stylishwebs
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Browsing All Comments By: stylishwebs
  1. Great to hear! Hope your 2022 is starting out well.

  2. James, Thank you for the comment. We strive to help folks make the right decision for their individual situations.

    Tankless Hub Editor

  3. Hello Joseph, Thank you for your comment. The post “What are the Best Tankless Water Heater brands?” does not claim to rank the brands, but only to provide information on 10 of the top brands. Our website does rate and rank individual tankless units, but we do not rate and rank the brands. Please note on this post discussing the brands we state “Our brand content will help you to start your search as you begin to understand who these top brands are and how they differ from one another. You can have a close look at them, do your own research and choose the one most compatible with your needs. Simply click on a manufacturer logo (above) to learn more about who they are and their products.” We want to give information to help you, the consumer, better understand the brands, not to rank them. Hope that helps. Still we will review our verbiage to ensure we are have a consistent and clear message. Thanks again.

    Tanklesshub Editor

  4. If you are looking for an electric unit for your RV, we’d recommend the Ecosmart ECO 11. See review here: https://www.tanklesshub.com/ecosmart-eco-11eco-18-electric-tankless-water-heater-review/. A good second choice would be the Rheem RTEX11 or 13. Review found here: https://www.tanklesshub.com/rheem-rtex-11-rtex-13-tankless-water-heater-review-budget-models/ . Just make sure you have the electricity needed to run the units in your RV. Hope that helps.

    TanklessHub

  5. We are sorry to hear of the troubles you have had with the Navien unit. That’s a lot of cash. I hope that you have contacted Navien about your troubles. Generally, we have not heard many complaints about Navien units, but it could be related to how well the unit had been serviced prior to you owning it. For instance, if the previous owners were not flushing in annually or bi-annually, that could have caused problems. Also, it may not have been initially installed correctly, or perhaps the unit was too small a GPM for the use that it did receive and maybe was overworked. Anyway, we’d be interested in hearing what Navien told you regarding your troubles and costs. Thanks for telling your story here.

  6. I can suggest a size, but the brand will be up to the individual. Your website seems to offer similar information to mine. I might ask you the same question. If someone can afford it, I suggest a Rinnai unit that handles at least 7 to 9 gpm for a family of 4. Depends on the climate. Can’t go wrong with https://amzn.to/387Enay.

  7. You should be able to replace any tank water heater with a tankless unit that fits your gallons per minute (GPM) requirements. I’m assuming that the tankless water heater would not be serving the same water sources as the other 75 gallon tank water heater. If you have propane or natural gas heating your water, the transition to tankless should be smooth. However, if you heat your water with electricity, then installing a tankless will likely require you to upgrade your amps and the gauge of the wire to the electric tankless unit. Hope that helps.

    TanklessHub Editor

  8. Congrats on considering a tankless system. As for PSI of water pressure, 40 psi or above is recommended for maximum flow. Gas PSI will work fine with 30 PSI. As for using 1/2 pipe for the gas, it can work, but most units today are built for 3/4″ pipe as the pipes within the units are 3/4″. Depending on your water heating needs, it could work to have a 1/2″ pipe with an adapter to fit to the 3/4″ fittings on the unit. But if you have more need to have the best flow of hot water, it would be best to replace your 1/2″ input piping to 3/4″. Hope that helps.

    TanklessHub

  9. Thank you, Samantha.

  10. On our Noritz brand page “best” means the unit we recommend for most shoppers for it’s size, price and quality of all the Noritz units. It my may be the “best” for you depending on what size you need and whether or not you have natural gas, propane or electricity to heat your water.

    Just so you know, we were about to change our our “best” Noritz choice because the one we currently have listed has been discontinued. Our new “best” is Noritz NRC66-DV-NG Natural Gas unit (https://amzn.to/3bV39Nn). This compact unit is a great choice for smaller homes and apartments. At just 6.7 x 13.8 x 23.6 inches and 38 lbs, it can be installed almost anywhere, including attics, garages and closets with proper ventilation. Its lightweight design also means that it can be wall-mounted to save on floor space. In terms of power, the NRC66-DV-NG offers up to 6.6 GPM depending on how many sinks, showers and faucets you have running at the same time.

    While this isn’t the highest flow rate on the market, We’ve found that it’s more than adequate for homes with only 1 or 2 bathrooms.

    You might also like the special low-NOx design that Noritz uses on so many of its products. Like the NRC98 series, these units can be installed indoors thanks to their internal condensing systems. This means increased safety for families especially, and it might be worth the slightly greater price if you’re also given greater peace of mind.

  11. There really is no “heating” difference between indoor and outdoor heaters. The only difference is with Gas units. The indoor units have to be vented to the outside and the outside units don’t need that venting. Hope that helps.

    TanklessHub

  12. Hello Phil, I am very sorry that you are having trouble with you Marey unit. We are a review site and have no affiliation with any of the Brands listed on our site and do not have technicians. I would suggest that you contact Marey directly or a plumber in your area to troubleshoot. So sorry you aren’t getting the hot water from your new unit. Please let us know if and how you were able to resolve your issue.

    TanklessHub

  13. Thank you for sharing your experience with Marey.

  14. Navien has pulled all their products off of Amazon. This unit was one of their lines, but they discontinued them apparently in early 2020.

  15. It really depends on the individual situation. If you have natural or propane gas, it can be the same or more economical. Recirculating units can be even more economical than tanks because you save water costs by not having to run the water in order to get hot water to the tap. Tanks heat and reheat water even when hot water is not needed for hours on end. So, again, it really depends on the situation. Hope that helps.

  16. Thank you, Wall. That’s exactly what we hope this site will be. Please spread the word! 🙂

  17. I hope you were able to get one installed. The “instant” part of tankless hot water is only with the systems that come with a recirculating unit or you can attach a recirculating unit separately.

  18. Luz, what you are experiencing is not normal. They should have just sent you a whole new unit. I say return it and go with another brand. Rinnai comes to mind. Is this the product you purchased (L10 3.0 GPM Portable Outdoor tankless water heater)?

  19. Cynthia,

    That is most certainly not a good or normal for this unit. I am curious as to what your plumber has said as to why it may be failing? Was it installed by the same plumber who has replaced the elements? Do you have hard water where you live? I would contact Ecosmart and lodge a complaint. Their brand’s reputation is on the line for you and they may indeed try to make it right. Still, I can maybe see a faulty element in the original unit, but not a repeated issue. Sorry this is happening to your daughter.

    DK

  20. If would appear we didn’t answer this question. I trust that in the last year your found your answer?

    Thanks for stopping by our review site!

  21. Mark, thank you for the input. For the last few years, Takagi has had an excellent record, but recently it appears that they have begun to slip. We are examining if this is truly a trend or something that is being fixed. Thanks again for posting.

  22. Thank you for your question, Lee. I’m guessing your water is sitting in your tank water heater while you are not there. Any time water sits, it has the opportunity to smell more than it normally would. However, any unfiltered water will smell if it sits without being flushed out regularly. So the simple answer is since a tankless water heater does not hold water, you shouldn’t get that smell.

  23. Hello Jeff,

    Sounds like you have had a very poor experience with Marey. You mention that you had no customer support. I’m guessing you were in contact with them, but they never offered to a) send you a new unit or b) troubleshoot your issue or c) offer to give you your money back? In other words did you have any interactions with Marey about your unit for the past 2 years? Marey doesn’t get top ratings, but they should still work. Still your input is very helpful and a cautionary tale to would-be buyers. I would suggest you put your comments on Amazon if the model you purchased is still being sold there. I’m curious as to what model you purchased.

    We wish you the best going forward.

    TanklessHub.com

  24. Hello Bruce,

    I’m sorry you are having trouble with your HTP unit. We have not reviewed the HTP brand or models, but are curious which model you have, how long you have had it and just what the trouble is. Please let us know.

    Have you troubleshooted the problem with a plumber or the manufacturer?

    Thank you.

    DE Klingenberg

  25. Kevin,

    Thank you for adding your comments to the discussion. I have had a Rinnai in my cabin for the past 3 years and have not been disappointed at all!

    Doug

  26. Sherrie,

    Thank you so much for letting us know! Please send your friends to the site if they are interested in a new waterheater.

    Doug

  27. Steve,

    Most of the newer, gas tankless water heaters on the market do not have a “standing pilot light” so there’s no worry that gas is being consumed when the water heater is not in use, but electricity is typically required to ignite. For instance, Rinnai tankless gas water heaters have a direct-spark electronic ignition. Once the hot water faucet is turned on calling for hot water, the system immediately electronically lights and begins heating. When not in use no pilot flame remains. Therefore, the system will not work if the power is off unless it has battery backup. I did look for units that simply ignite from water movement (hydropower), but they are few and far between. Bosch makes one that does that, but by far the most efficient and reliable are those with Electronic Ignition, which would be most of the units reviewed on our site. I personally have a Rinnai unit at my mountain cabin and it works like a charm and isn’t burning fuel while I’m away from the cabin for sometimes months at a time.

    Hope that helps you.

    Doug

  28. Steve,

    Sorry for the delay in our response. It is good that you would almost have a dedicated propane tank. I want give you a thorough answer to your question. Most pilotless ignition models require electricity, but there are a couple out there that ignite with water flow. Stay tuned as we review these to ensure our recommendation is sound.

    Doug

  29. Hello Steve,

    The GPM (gallons per minute) requirements depends on regular simultaneous usage. In other words, if you have 2 bathrooms and regularly run two showers at the same time, or run the dishwasher and clothes washer and are taking a shower at the same time, you’ll want something that would be rated at 4 to 5 GPM for your climate (temperature of ground water). The GPM usage chart we have near the top of https://www.tanklesshub.com is a quick way to check. Hope this helps.

    Doug

  30. Hello Josh! I think you may have answered your question when you said “cheap” electric model. I’m guessing you might be referring to an under-the-sink model, but regardless, the reviews we have are for units that maintain the temperature throughout the flow, even on low flow, especially after the hot water reaches the tap. I have a Rinnai 75 propane unit at my cabin in the mountains, and I’ve not had any fluctuations in temperatures when washing dishes and running the shower at the same time. The unit’s rated flow rate is the key as per the chart on tanklesshub.com’s home page. Hope this helps!

    Happy hot watering!

    Doug

  31. Hi Linda,

    Thank you for your questions. If you have an outside propane tank at your home, then you can install and propane tankless water heater. You can certainly install it were you had your electric tank water heater, but you’ll need to do two things: 1) run a gas pipe line to the location and 2) have the proper ventilation. You will need to follow all the safety protocols for any gas appliance. All tankless water heaters are smaller than any tank water heater so the installation area where you have your tank would be sufficient.

    There a very few hybrid tank-tankless water heaters on the market and can be electric, natural gas or propane. They are not at all popular, meaning that people either go with a tank or a tankless heater. The Hybrid is combining a storage hot water tank with tankless, on-demand water heater. It’s meant to replace a tank water heater with the same size unit, but with a tankless water heater attached. Rather than the water in the tank being heated by traditional rods, the water is heated by a tankless water heater. However, as with any tank water heater, the water in the tank needs to continuously be reheated every time it drops below the desired temperature, which means more energy is spent when hot water is not being called to a faucet. We don’t review these systems on our site simply because they are not truly “tankless” systems.

    Hope this helps!

    Doug

  32. Hello Brian.

    Interesting question. Not sure it makes since to hook the two systems in succession since the tankless water heater typically operates with cold water coming in to it. However, I suppose you could hook up the tankless down stream from the solar water heater and when the solar system is sending cooler water through, then the tankless would finish heating up the water to the desired temperature. If you did this, I have no idea how the tankless system would work if the water coming in is hotter than the temperature setting on the tankless system. My guess is that the tankless system would spend no time heating the water since the temperature gauge already knows the water is hot. Another consideration is hooking up the tankless separately to your home’s incoming cold water and just have a diverter-valve installed so when your solar water heater is not getting the water hot enough you could switch to the tankless. But don’t take my word for it. The best thing to do is ask your plumber who would be installing the unit. Hope this helps.

    Happy Hot Watering!

    DE

  33. Greetings Claus!

    Since you are in WV and your incoming water is colder than the more southern states, the TKJr2 will not achieve 6 gpm. You’d be looking at 3.5 to 5 gpm most likely. However, that would be sufficient to run two showers simultaneously and maybe even a sink. Since you say that you’ll only be using one shower 95% of the time, that looks like it might be the best fit for your place…especially with the small square footage.

    http://www.tanklesshub.com/takagi-t-kjr2-in-lp-tankless-water-heater-propane-review/

    Any licensed plumber should be able to install and not void the warranty.

    Just so you know, the Takagi K-Jr2 is by far the most purchased small whole house system on Amazon.

    Thanks for your questions. Hope your purchase and install go well.

    Please leave a message on the site about your experience under the review (http://www.tanklesshub.com/takagi-t-kjr2-in-lp-tankless-water-heater-propane-review/).

    Take care!

    DK

  34. Hello Edward.

    I’m sorry to hear that your system is not working properly. We are a review/blogging site for various brands and systems, but are not a service or warranty center for any of these brands or systems. Please see our disclaimer page if you’d like to know more (http://www.tanklesshub.com/disclaimer/). That said, we’d be glad to help you think through how to find a solution to your issue. Did you purchase a Navien tankless unit? Did a licensed plumber install it? Have you reached out to the manufacturer to help you troubleshoot your issue? Is it still under warranty? If so, you should contact the manufacturer immediately. I’m sure Navien would want you to be a satisfied customer. Three weeks is indeed a long time. Please keep us posted right here as to how you problem is resolved. Thank you for reaching out. Your story is important for our readers to hear.

  35. Hi Janine,

    Given what you explained to me you can check out my Propane Tankless Water Heater Page at http://www.tanklesshub.com/best-propane-tankless-water-heater-reviews/.

    Given that you are in Minnesota and the ground water is cooler, I would recommend the following units that in warmer climates are rated from 9.0 to 10.9 GPMs. The lower would ensure you could run 3 showers simultaneously, while the higher GPM would ensure up to 4 showers.

    Takagi TH3DV TH3 Series
    10 GPM Check Price

    Rheem RTGH-95DVLP
    9.5 GPM Check Price

    Rinnai RL94eP
    9.4 GPM Check Price

    Rinnai RUC90iP (New)
    Rinnai is always improving as are the other companies. I haven’t had a full review on this unit yet, but it may be a good fit. 9.0 GPM Check Price

    Rinnai RUR98iP (New)
    Again, I haven’t had a full review on this unit yet, but it comes with a recirculation component on a timer that ensures hot water at your showers when you need it most. 9.8 GPM Check Price

    Rheem is a good brand and make a good unit, but Takagi and Rinnai are primarily Tankless manufacturers first and would advise you toward them first.

    Happy Hot Watering!

    Doug K.

  36. Janine,

    Well, your Lowes guy I’m sure has the best intentions, but it really depends on each individual situation. So to clarify, you have a propane tank water heater that is ventless? Where is it located in your house? If you don’t have a way to vent a propane tankless water heater that you would put in your house, you can always get a ventless unit that can be installed outside. The trick would be to have it placed under an eave so has to protect it somewhat from the elements. The only reason I can really think of that would make your situation not conducive for a tankless system is the initial financial cost. Because you are in Minnesota (a cooler ground-water climate), you will need to choose a more robust unit to bring the cooler ground water up to the desired hot temperature. Therefore, if you determine the number of showers and sinks you regularly run simultaneously, I can recommend the best units for you. Let me know more about your situation.

    Yours,

    Doug K.

  37. Makes sense. Thank you for the reply!

    DEK

  38. Hello again, Jim,

    Apart from the number of bathrooms and the volume of usage, the next most important piece of information is the location of your home. Colder locations would require a bigger unit to produce enough gallons per minute to accommodate you and your wife and a house full of guests. Then you have to ask, how often will more than 1 or two showers be running at once? Also, where is the water heater in proximity to your bathrooms? Will the water heater be installed indoors (which would require proper ventilation) or outdoors? In my vacation cabin, which is in a cooler climate, I have two bathrooms (one with a shower and one with a tub). We installed the indoor propane powered Rinnai RL75iP (https://amzn.to/2JJkpFq). When we go to the cabin we usually have from 4 to 8 guests (sometimes up to 12) and we always seem to have hot water for all the guests. Since most people take showers, folks are taking showers one after the other or at different times during the day. That said, when I’m running the bathtub and the shower at the same time, there’s enough hot water generated for both. Therefore, I recommend at a minimum you get a unit that produces 7.5 – 8 gpm of flow in warmer climates especially since it’s just the two of you most of the time. The beautiful thing about tankless, is that even if you have 10 people taking back to back showers, you will never run out of hot water like you would with the old tank unit.

    As for having units with water re-circulation built in, there aren’t too many units or brands that have that capability. The better ones do not. Some lower priced brands throw that in, I believe, to make their heaters have other bells & whistles, but these generally aren’t known for the water heating functionality. Rinnai and Takagi are two of the best brands for whole house propane units: Rinnai RL75iP (https://amzn.to/2JJkpFq) 7.5 gpm, Rinnai RL94iP (https://amzn.to/2l2mX6C) 9.4 gpm, Takagi T-K4-IN-LP (https://amzn.to/2JJ9jQr) 8 gpm, or Takagi T-H3-DV-P (https://amzn.to/2LM5gnc).

    With regard to recirculation for instant hot water, my recommendation is the Watts 500800 Instant Hot Water Recirculating System with Built-In Timer (https://amzn.to/2t4zbzn). Because you don’t want to have hot water recirculating in your home all day and all night, which would make your tankless unit run all the time, this little, easy to install, very quiet, recirculating pump enables you to set recirculation to occur just before you normally take showers in your home. For instance, if you normally wake up at 6 am and shower by 6:15 am, then you can set your pump to only bring hot water to the tap beginning at 6 am , but ending at 6:30 or 6:45. That way, as soon as you turn on your shower, you will have “instant” hot water. At my cabin the tankless unit is in the same room as the downstairs bathroom with tub. The unit is approximately 10 feet from the tub and the shower is directly overhead on the 2nd floor. We need no recirculation pump as water is hot at the taps of both within seconds.

    I hope this information helps you in your decisions!

    Let us know, after you install your system, how it is working for you.

    Doug

  39. Hello Jim,

    Thank you for your comment. We will respond with a more complete response very shortly. Stay tuned and thank you for stopping by tanklesshub.com.

    Doug

  40. Hello Dave, Sorry for the delay in my response. Per Takagi’s Users Manual, there is NO specification that it must be stainless steel, but that is recommended for longevity/endurance, especially in cold weather situations. No one wants any leakage in their water heating venting and stainless steel is typically the best assurance against that. Hope this helps.

    Happy Hot Watering!

    DEK

    Here’s a quote from the Takagi specification sheet (https://images-na.ssl-images-amazon.com/images/I/91G0zEk1nBL.pdf)

    . VENTING AND COMBUSTION
    • 4” Category III Vent
    • Vertical or Horizontal Installation
    • 50’ Max Length, 5 Elbows max (90°
    elbows = 5’ equivalent length)
    • Power Vent Power Vent or Power Direct
    Vent
    • Electronic Ignition – No Pilot Light
    • 3” Combustion Air Intake (with optional
    kit)
    OPTIONAL ACCESSORIES
    • Complete Line of Category III Venting
    • Recess Box (outdoor models)
    • Pipe Cover
    • Direct Vent Conversion Kit (indoor
    models)
    • Isolation Valve Kits
    • Backflow Preventer
    • Concentric Termination Kits

  41. Hello Scott, I purchased and had my plumber install a
    Rinnai RL75iP Propane Tankless Water Heater. Altitude is not a concern, but since my cabin is at 7600 feet and the ground water is much cooler, I chose this unit because is has 7.5 gpm flow rate in warmer climates, giving me about a 5 gallon per minute flow rate at my cabin. This is sufficient for my two bathrooms and kitchen. I always have hot water. 🙂

  42. Great question, PJS! Pex can be used. I had almost all my copper tubing in my mountain cabin replaced with Pex supplying all the hot water to my two bathrooms and kitchen. That said, you should always follow the manufacturers recommendation for the type of piping that affixes directly to the unit. What you planned sounds like a viable plan.

    Drain the Tank! Happy Hot Watering!

    DEK

  43. Hello Peter,

    I can certainly relate to wanting to install a tankless unit in your cabin, as I did that 3 years ago in my cabin in the mountains of Arizona. However, I had a certified technician install it. Our cabin has a propane tank which we only use for our heaters and now our tankless water heater. Since you are saying you have a small cabin, the Takagi T-kjr2 should work great. Installation isn’t too difficult, but you will want to be comfortable. The instructions found in this manual (https://images-na.ssl-images-amazon.com/images/I/D12vjBFf5XS.pdf) should prove helpful to gauge your comfort-level. Probably the biggest issue in installation is to make sure your venting is done right and that your vent has a back-flow preventer so as not to allow the colder air from the outside to flow back to the unit. It is often suggested to install your venting first to ensure you place the unit in the right spot. It is helpful not to have too many twists and turns in the venting.

    Hope this helps!

    DEK

  44. Hello Rick!

    A tankless water heater can be used in a mobile or manufactured home, single-wide or double, it does not matter. You just need to find the correct size and have the appropriate size gas line, or correctly rated electrical wire and breakers if you only have electricity. If you have a gas supply, simply choose the correct unit for propane (http://www.tanklesshub.com/best-propane-tankless-water-heaters-reviews/) or natural gas (http://www.tanklesshub.com/natural-gas-tankless-water-heater-reviews-best/) depending on what you have. Most of the brands we review, including names like Rinnai, Rheem, Takagi, and Bosch, all carry units that would work well with mobile or manufactured homes.

    Hope that helps! If you purchase and install one, I’d like to hear your story. We are in the process of putting up a new page on the site of tankless owner stories and would love to hear yours.

    Doug

  45. Hi Jim,

    The short answer is that it is possible to integrate the two. Rheem claims to have the only system of its kind manufactured by their experts, but it is entirely possible, in my opinion, that most tankless water heaters could be integrated with an existing hydronic heating system.

    1. Tankless Water Heater
    The tankless water heater serves two purposes in the hydronic system: it provides continuous hot water for use throughout the home. When a call for heat is made, the tankless water heater also acts as the heat-source for air handler, providing both hot water and heating for the home simultaneously.

    2. Hydronic Air Handler
    The hydronic air handler features a hydronic heating coil in place of either electric heating elements or gas-fired heat exchangers. When in heating mode, the hydro pump circulates hot water between the tankless water heater and the hydronic coil.

    3. Cooling Coil
    In Cooling mode, the cooling coil operates the same as any other heating and cooling system.

    We wish you the best in trying to make this work. Keep us posted. Happy Hot Watering! DEK

  46. Thank you, H! Our review doesn’t go quite that deep into the electricity details of using these products in foreign countries not on a standard grid. That said, you might want to ask your question with the manufacturer themselves at https://www.ecosmartus.com/support. We wish you the best in getting your electrical question answered. Happy Hot Watering! DEK

  47. That’s a good question, Tim. Of course every situation is different and some brands have solutions that others may not have. One of the best ways to keep your water lines from freezing is to wrap the pipes and install a pipe cover which some manufacturers (like Rinnai) make and sell. With regard to Rheem models I would encourage you to contact them directly at http://www.rheem.com/products/water_heating/tankless/how_to_install/troubleshooting_additional_support_16/ to see what solutions they may have if that is the brand you wish to go with. Happy Hot Watering! DEK

  48. Hello Bob,

    When you say that it continually hums, that doesn’t sound right. I have a Rinnai at my cabin and it is silent until a faucet is turned on, but it is also mounted in the laundry room. I would suggest that: 1) that you contact your installer/plumber for their thoughts, 2) you write a review under the product on Amazon (sometimes the seller will provide an answer there), and/or 3) contact Rinnai directly (https://www.rinnai.us/support). I absolutely love my Rinnai. Good luck! DEK

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