Flow sensor adjustment for Navien 240S natural gas


We installed a Navien 240S natural gas in our house, and it is working fine.

Except the short range for hot water valves in the showers. So, in other words, I need to turn shower valve almost all the way on to start the hot water. This leaves us a very small range to adjust hot water when taking a shower. My plumber explained that it is because the sensor is triggered only with a certain water flow. In general, the water pressure is high already. But there is just not enough flow until I turn the faucet almost all the way on.

Is there way to adjust the flow sensitivity for the sensor in the water heater?

My plumber suggests the following: He can install some flow controls on the cold water pipe in each shower and set them to desired temperature range.

Is this a good solution?

I find it strange that I cannot adjust that sensor on the...

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Navien NPE-240S 199,000 BTU Condensing PremiumGas Tankless Water Heater

Navien has been pushing the boundaries of efficiency for 25 years. The NPE-240S is a result of their dedication to providing an effective and green water heating unit. The NPE-240S and all Navien models utilize condensing technology which captures additional heat lost by typical water heaters. The Navien NPE-240S's energy factor is superior to both traditional water heaters and noncondensing tankless models. Reduced vent temperatures due to this condensing technology allow you to use PVC venting, which saves you money and contributes to the ease of installation. The Navien NPE-240S has excellent technology for reducing your heating costs and carbon footprint.

Product Features:
Help the Environment
The Navien NPE-240S will reduce your home's impact on the environment. Eco Pre-mixed Burners reduce CO and NOx emissions by combining gas heating and air before ignition. The result is a nearly...

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So, the secret is out, guys. Tankless water heater are becoming more popular in Europe — and in the United States as well — than ever before. Actually, they began in Europe and have made their way to the United States over the years.

Tankless water heaters had some serious issues when they first came out. They were known for their unreliability, short bursts of cold water (also known as cold water sandwich) and other minor mishaps; but luckily for us, they have gotten much better, and their problems were all addressed over time.

Nowadays, one thing I can say with my eyes closed, is that tankless water heaters work, and they work well. Put your trust in these water heaters and you won’t be disappointed.

Ultimate Guide to Navien Tankless Water Heaters

Navien is one of the best tankless water heater brands out there. It’s and always has been one of the leading companies in water heating equipment for decades. Now KD Navien manufactures the world’s top...

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Review of the top 3 gas-powered on demand water heaters.

Looking for the best tankless water heater to buy for a home? Many are available, but which one to select: Rinnai, Noritz, Takagi, Navien, Paloma, Rheem, or Bosch? This is how we can help; we will find, review and select the best models by checking the quality, available features, warranty, price, savings and user reviews.

The best tankless hot water heaters are condensing units resulting in ultra efficient operation and Energy Star compliance. What's great about condensing water heaters is the ability to utilize the heat from flue gases that would otherwise be lost, and use it for preheating the cold incoming water.

The temperature of the flue gases significantly decreases, so cheaper PVC vent is used instead of the expensive ones. The best models are designed with many innovative features and quality elements, which ensure energy savings, better performance, reliability, long life and low emission...

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Depending on the heat source that you use in your home, you may find that this Navien NPE-240A-LP Premium Condensing Tankless Gas Water Heater Propane does a better job of heating your water than any other model will. Designed for use with propane systems, this water heater easily connects to your existing venting system to keep gas from lingering around your home, and you can also hook it up to newer two-inch PVC venting pipes too. Like other hot water heaters from Navien, it will also work with standard 1/2-inch gas lines like those already in your home.

Installing this hot water heater in your home can help you cut down on energy bills in the first month as well as in the coming months. As an Energy Star rated hot water heater, it requires less gas to heat the water, and you can even check with Energy Star to see just how much your bills will drop when you rely on this heater. It features a preheating system that heats the system itself, which in turn allows the...

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KyungDong Navien or KD Navien was established in 1978. About 10 years later, the company became the first Asian developer and manufacturer of eco-friendly and efficient condensing boilers. Today, KD Navien has gained a world-wide reputation for being a pioneer in the water heating industry. Navien’s products are not only efficient and reduces carbon dioxide but they also cut down energy costs.

Navien expanded its operations to the U.S. and Canada in 2006 and quicly became one of the most reputable manufacturers of home comfort products, including gas tankless water heater units.

Pros and Cons

Navien’s Premium Tankless Gas Water Heaters are available for both residential and commercial use. Unlike traditional tank water heaters, Navien tankless heaters provide an endless supply of hot water any time you need it.

So what sets Navien tankless heaters apart from other water heater products? Navien specializes in condensing tankless water heaters and this...

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Posted on Mar 18, 2010 |

[Update] The early generation Navien tankless systems have had some definite issues… So much so we completely stopped selling them around 2009. For the most part Navien did a good job helping customers and dealers fix and repair the mistakes in their past units. I’m happy to say we are now selling and actually promoting Navien tankless water heaters again. Their new generation launched in 2011, redesigned and vastly improved. Having personally reviewed and tested the new generation we all feel confident in recommending a Navien for your water heating needs.

Get A Free Navien Quote

Navian was the first to come out with a condensing tankless water heater and thus they are bound to have some additional issues. This post is aimed at addressing and solving some of the common problems associated with their early generation systems.

Navien flow sensor issues Navien Control board failures Navien Heat exchanger cracks


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