Overview of Navien gas boilers

Having the correct heating system is essential to maintaining a warm and cozy home. When looking for dependable and efficient heating solutions, homeowners are increasingly choosing Navien gas boilers. These boilers are worth considering for anyone in need of a new heating system because of their many advantages, including their high efficiency and cutting-edge features.

Gas boilers made by Navien are known for their energy efficiency, which lowers environmental impact while saving homeowners money on heating costs. These boilers’ cutting-edge technology and creative designs optimize heat transfer and reduce energy waste, guaranteeing long-term cost savings and peak performance.

Navien gas boilers are highly versatile and adaptable to a wide range of heating requirements. Navien provides a variety of boiler models appropriate for various sizes and types of properties, regardless of the size of your home or apartment. Because of this flexibility, homeowners can find a boiler that better suits their needs.

Navien gas boilers are renowned for their dependability and durability in addition to their efficiency and adaptability. With their long lifespan and high-quality construction, these boilers are made to endure years of trouble-free operation, providing homeowners with peace of mind that their heating system is long-lasting.

Additionally, the sophisticated features and cutting-edge technology that Navien gas boilers are outfitted with improve convenience and user experience. These boilers offer contemporary features that make managing and controlling your heating system easier and more efficient than ever before, such as intuitive controls and remote monitoring capabilities.

We will go deeper into the world of Navien gas boilers in this post, going over their features, advantages, and things to think about for homeowners considering a new heating system. Making an informed choice for your home comfort needs can be aided by knowing what Navien boilers have to offer, whether you’re building a new home or replacing your old heating system.

About the manufacturer

With over 30 years of experience producing heating equipment, KD Navien Co., Ltd. has made a name for itself as a producer of equipment with the best possible technical specs and versatility. It is present in the Russian market as LLC "Navien RUS"’sofficialrepresentative office. The service structure is very advanced and extends beyond the Moscow area to all parts of the nation.

This brand’s gas boilers are reasonably standard, straightforward, and efficient—depending on the model, ranging from 90 to 92% on average. First and foremost, the focus is on affordability; Navien boilers are consistently at least 5–10% less expensive than their analog counterparts. Therefore, even in the middle price range, the manufacturer saves a significant amount of money on materials. Heat exchangers are made of steel rather than copper, and there is no thermal insulation. Additionally, spigots are typically made of steel, circulation pumps are noisy, and all of the switches are noisy. But at a reasonable price, it’s more of a position than serious drawbacks.

Another notable feature of the manufacturer’s gas boilers is the extensive range of automatic functions. Even the most affordable models have a price tag of $30–35,000. You can program the boiler to operate for the following day or week using a programmer. A room thermostat and an external temperature sensor are included in the basic configuration of more expensive models. The menus and controls are very user-friendly and easy to understand.

All the benefits notwithstanding, there are concerns about the dependability of heating boilers, particularly hinged models. The products do not lead in the number of breakdowns, based on service call statistics, but the notion that Korean appliances are unreliable is also unfounded. Errors 02 and 03, which are related to either an ignition or circulation violation, are typically raised by the boiler. Almost all current parts break down; the three-way valve, circulation pump, and turbine are the most common ones.

When using hard, contaminated coolant, heat exchanger problems are generally almost normal for steel structures, but they have become more common in recent years for models 8 to 10 years old.

It would be more accurate to state that the majority of cases involve trouble-free operation for extended periods of time rather than just the few. The manufacturer’s wall-mounted gas boilers, along with Italian Ferroli and others, are among the least dependable in the price range, according to statistics on service calls. Not to be overlooked are the nearly flawless floor models.

Knowing the ins and outs of heating systems is essential if you want a comfortable and energy-efficient home. Navien gas boilers are among the leading options for dependable and effective heating solutions. Modern technology, excellent efficiency, and easy-to-use features combine to make Navien boilers a popular option for homeowners looking to modernize their heating systems. Navien boilers stress cost-effectiveness and environmental friendliness alongside comfort and convenience, from their small footprints to their sophisticated control options. A step towards creating a warm and sustainable home environment is investigating Navien gas boilers, whether you’re looking to replace an old boiler or weighing your options for a new build.

Reviews of owners about Navien gas boilers: advantages and disadvantages

Since the entire model range cannot be generalized, many features depend on the model. However, we have outlined the general benefits and drawbacks that apply to each model after examining installation and operation experiences as well as numerous owner reviews.

Advantages	Disadvantages
The cost is one of the most affordable in the budget and medium price segments	Reliability raises many questions, budget materials are used
Efficient and productive design	Owners often note noisy operation
Owners often note the intuitive and convenient control menu	Small selection of floor models
Functional automation, remote controls and external temperature sensors in the basic equipment of many models	Often throw out errors at a drop in gas pressure in the mains, are demanding to the quality of the coolant and timely maintenance. Although the manufacturer declares about adaptation to Russian conditions
Wide model range	No single-circuit models
Developed service structure and availability of components

The best and most famous models: characteristics and prices

Wall-mounted

Ace (ATMO)

Among the lineup, the classic atmospheric two-circuit overhead boiler is the most affordable. Being the only model in the range with a primary copper heat exchanger, it stands out from the rest due to its significantly higher heating rate, thermal conductivity, and five-year average durability. However, because of the open combustion chamber design, the boiler’s efficiency—which stands at 86%—is optimal but not high. The prepared water is also supplied for a considerable amount of time (between 30 and 40 seconds, depending on the length of the pipeline), and its temperature is frequently unstable due to the low performance of the DHW circuit.

What’s nice is that even in its most basic configuration, the least expensive atmospheric model comes with a room thermostat. Auto-diagnostics and protection against freezing and overheating are included. However, there’s no safeguard against turning off the circulation pump. The boiler is supposed to be voltage fluctuation tolerant, according to the manufacturer. In terms of dependability, the model typically functions flawlessly for a minimum of seven to ten years. Nonetheless, there have been enough operational mishaps and instances of control board failure. Either way, the boiler requires frequent cleaning and is hard on the power supply and coolant quality.

How to pick a room thermostat to reduce your monthly heating expenses by up to 30%

Deluxe S COAXIAL

A slightly more costly, but in terms of features and performance, far superior two-circuit model with a closed combustion chamber. The design efficiency is 91.4%, and all common protective mechanisms—including pump blocking—are available. But this heat exchanger’s main component is already made of steel, which is less inventive and more prone to corrosion.

One piece of basic equipment is the room thermostat. One of the quietest boilers in Navien’s wall-mounted lineup, owners frequently remark on its nearly silent operation. The unique feature is that all parameters are adjusted via a remote control, which has drawbacks of its own (the wire is only 2 meters, no backlight display). The boiler body itself has no controls.

In terms of dependability, this model will be simpler to use because only the control board’s frequent failures can be identified. Because the boiler requires a lot of grounding, connecting through a voltage stabilizer is preferable. Other than that, service experts observe that the model is generally not a source of complaints due to its ease of maintenance.

SMART TOK

Expensive, multipurpose, two-circuit gas boiler featuring a closed combustion chamber. 91% efficiency, modulating burner; in actuality, gas consumption is less than with earlier models. Every contemporary defense mechanism is available.

A room thermostat and a street temperature sensor are among the basic components. With the help of a room thermostat’s programmer, you can drastically cut down on fuel usage by scheduling the boiler’s operation for the following day or week. Additionally, the control unit has a built-in Wi-Fi module. You can control the boiler remotely from a smartphone using an official application. Although models costing between 60 and 80 thousand rubles typically have equipment of this caliber, the SMART TOK is not without its drawbacks.

First of all, owners often complain about the problems of the control panel, it often buzzes or emits an unpleasant whistle, there have been cases of failure. Often the time is reset on the PU, which does not allow normal operation according to the schedule set in the programmer. Also, some owners complain about incorrect readings of the built-in thermometer in the remote control. Among service workers, the model is also not considered reliable, the circulation pump, control board, three-way valve, turbine fail. It should be noted that spare parts are also extremely accessible and inexpensive. DHW circuit is the same as in previous models: the same low productivity, often unstable water temperature.

NCB 700

Closed combustion chamber model of a two-circuit condensing unit. According to the condensing principle of operation, there must be a second heat exchanger to remove heat from the flue gas condensate. As a result, the boiler efficiency is 107.7%, which is the condensing unit average. The high performance of the DHW circuit—10 liters per minute at 40 °C in the water—should be noted. Analogs in the same price range provide comparable results at 30-35 °C. There are safeguards against freezing and overheating.

There is no room thermostat or remote control unit included with this model. It is a relatively new product on the Russian market, and its operation has not been well-established. During its early years of use, no significant malfunctions have been reported. available in versions with 24 and 35 kW.

Every aspect of condensing gas boiler operation and selection criteria

Floor standing

GA

Floor-standing, two-circuit gas boiler with a steel heat exchanger and a closed combustion chamber. Because of the turbine design, it has a relatively high efficiency of 91.5% for floor-standing gas boilers. equipped with auto-diagnostics, auto-ignition, and protection against freezing and overheating. Please be aware that the boiler depends on energy, meaning that it needs to be connected to the power grid. The basic setup includes a programmer and a room thermostat.

The boiler can be installed in the heating systems of two-story houses because it can operate on both natural and liquefied gas and can withstand up to 3 bar of operating pressure.

In contrast to the variety of wall-mounted boilers, GA is renowned for having almost no problems. The only problems are with heat exchangers; hard, untreated coolant causes them to burst and leak rather quickly. A softening filter and coolant are essential, as is clean water from the well. Other than that, there are no complaints regarding the boiler; at this price, floor standing boilers with comparable features and capabilities are almost nonexistent. available in 23 and 35 kW capacity versions.

Official site: where to see all models and operating instructions

The manufacturer’s official Russian website can be found at navien.ru.

You can view all of the models that are available along with their descriptions by going to the "Equipment" → "Wall Boilers"/"Floor Boilers" → section. Electronic versions of the comprehensive installation, adjustment, technical data sheets, and certification manuals are included with every model. The features, installation plan, on/off switching algorithm, maintenance features, and schematic images are all described in detail in the manuals for each model.

What model of boiler in the end is better to choose

We believe that the atmospheric model Ace (ATMO) is the best wall-mounted option. It is more dependable because of its relatively simple design, and its price is as low as it can go. The basic equipment already includes a room thermostat. All that matters is using high-quality coolant and connecting the boiler through a voltage stabilizer. More costly and technologically sophisticated models frequently raise a lot of concerns regarding dependability.

One of the greatest gas boilers Navien for heating a private residence is the floor GA option, which is even better if the boiler room’s conditions permit. At only a little bit more than Ace, it is incredibly functional, affordable, and dependable.

Navien, Baxi or Protherm

These two European producers are frequently brought up for comparison by both buyers and sellers. In general, there aren’t many differences between Baxi and Protherm’s products, but there are noticeable differences between them and Navien. All comparable gas boilers from Navien are at least 10%–15% less expensive; only certain Baxi and Protherm models have room thermostats and programmable modes of operation; the three manufacturers’ boilers are comparable in terms of how well they convert gas into thermal energy. Nonetheless, the majority of the drawbacks of European manufacturers’ Korean boiler models are absent.

Functionality and reduced cost, in our opinion, do not outweigh the time and money required for additional maintenance and repairs. Moreover, having boiler issues in the middle of the heating season is a very unpleasant situation. Service statistics show that, in percentage terms, there are far fewer calls for Baxi boilers and even fewer for Protherm boilers.

Regardless of the gas service personnel or store managers, real information can be obtained by examining the quantity of issues mentioned in forum posts, video comments, and conversations with owners or service experts. Thus, in our opinion, it is best to stick to the models (Ace or GA) that have been previously mentioned and to limit your decision-making to only those when your budget is truly tight. Naturally, we do not dispute that the full model range functions flawlessly in the majority of situations.

Known malfunctions of boilers Navien

There is a long list of malfunctions, nearly all of which are unique to wall-mounted models. Boilers must inevitably be connected to the power grid via a voltage stabilizer because control boards (automation) are frequently destroyed by even tiny voltage fluctuations. Due to its brittle plastic construction, a broken or leaking makeup tap is a less painful but nonetheless common issue. DIP switches, circulation pumps, flow sensors, and turbines are less frequently out of order.

Breakdown is not always related to separate problems (click to expand):

This is not normal if, depending on the length of the pipe, treated water does not arrive after 30 to 60 seconds. The most frequent reason is scale buildup in the heat exchanger, which is particularly frequent in low-cost dual heat exchangers. Although replacement is frequently required, the heat exchanger can still be flushed if the fouling is not too bad. Less frequently, a malfunctioning flow sensor or the three-way valve that controls the heating could be the cause of the issue.

A leaky heating circuit, whether it be in the piping, safety valves, expansion tank, make-up tap, etc., is easily identified by a drop in pressure. The heating circuit’s improper operation is the issue. д. For the majority of Navien models, 1.2 to 1.5 bar should be the standard operating pressure. Leaky makeup taps are the most frequent cause of this problem; to fix it, you must inspect and seal every component of the system.

Every potential reason why home gas boilers’ water pressure might decrease

It is almost a given that the issue is with the control board, which failed as a result of a voltage drop. The wall-mounted model range, despite the manufacturer’s assurances, is highly susceptible to unstable domestic power supplies and requires connection through a stabilizer—a connection that nearly all buyers overlook.

The most common error codes

Every model has an auto-diagnostic function that includes a number of measurable parameters and facilitates fault diagnosis by providing the associated error code. Let’s examine the most prevalent ones:

Issues with the system’s coolant circulation. First, add coolant to the system using the make-up tap; the pressure gauge should read between 1.1 and 2.5 bar. Make sure the principles are upheld all day long. The failure of the circulation pump, which is unable to start at all or acquire the required speed, could be the second major cause. Rarely, a malfunctioning flow sensor or clogged dirt filter may be the source preventing the boiler from operating.

A flame signal is absent or the flame sensor circuit is broken. If every stop valve is open, the burners haven’t been readjusted, and the gas flows normally, the ignition electrode is the source of the issue. It can occasionally be cleaned easily, but more often than not, it needs to be replaced.

The smoke exhaust system is not operating correctly. If there is any ice on the chimney’s headband, start by carefully cleaning it out. If the issue remains unresolved and the chimney’s design remains unchanged, powerful wind gusts or turbine malfunctions could be the culprit.

An electrical short in the flow sensor. The flow sensor needs to be changed when this error occurs, but occasionally the issue can be fixed by carefully disassembling and cleaning the mechanism.

Model	Features
Navien NCB-E Series	Combination boiler providing hot water on demand, condensing technology for high efficiency, built-in recirculation pump for instant hot water
Navien NHB Series	High-efficiency condensing boiler, advanced eco-friendly technology, compact design, dual stainless steel heat exchangers for durability

Gas boilers from Navien are a viable option for homeowners looking for dependable and efficient heating systems. In the heating sector, Navien has made a name for itself with cutting-edge technology and a dedication to sustainability. These boilers are a desirable alternative for contemporary homes since they are made to save energy in addition to providing warmth.

The great efficiency of Navien gas boilers is one of their main benefits. These boilers’ use of condensing technology allows them to extract more heat from the combustion process, which lowers fuel consumption and lowers energy costs. By reducing carbon emissions, this efficiency not only helps homeowners financially but also promotes environmental conservation.

Furthermore, Navien boilers have a reputation for being dependable and long-lasting. These systems are long-lasting, made with premium components and cutting-edge engineering, giving homeowners comfort in knowing that their heating needs are met. In addition, Navien provides outstanding warranties and customer support, guaranteeing that clients will get help quickly in the unlikely event that there are any problems.

The adaptability and simplicity of installation of Navien gas boilers are additional noteworthy features. There is a Navien boiler model that is ideal for your needs, regardless of how big or small your home is. These boilers can be installed swiftly and with the least amount of disturbance to your everyday routine, enabling you to take advantage of the hassle-free advantages of effective heating.

In summary, Navien gas boilers offer homeowners a dependable and effective heating option. At the forefront of the heating industry, Navien has solidified its leadership position by emphasizing innovation, sustainability, and customer satisfaction. For quality, if you’re in the market for a new boiler, take a look at Navien.

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