TOP 12 best Navien gas boilers: rating 2021-2022 and what parameters wall-mounted and double-circuit models should have

The Navien gas boiler from the manufacturer KyungDong Navien (KD Navien) currently deserves special attention from the scrupulous consumer. The company was founded in 1978, and in 1988, KD Navien became the first company in Asia to develop and manufacture a high-efficiency environmentally friendly condensing boiler. This quickly made the company a leader in the condensing boiler market. Today, KD Navien produces the world's best efficient, energy-saving, CO2-burning water heating products. Kyung Dong Navien Co., Ltd. produces gas boilers and water heaters in South Korea.

The company offers gas, oil and medium/large boilers, as well as gas and electric water heaters. Navien provides zone control systems and offers wireless and automatic thermal equipment control products. Geothermal heat pumps. Fans for heat recovery.

Communication systems including home and home automation products and video intercoms. In addition, the company's engineers produce air conditioning systems, as well as micro-CHP products. The company exports its products to 30 countries, including the USA, Canada, China, Russia, Kazakhstan, Greece, Poland, Spain, the UK, the Netherlands, Turkey and Brazil and so on.

Rating of the TOP 12 best gas boilers Navien

Positive aspects of Navien products

Heating gas boiler Danko

Connecting a Navien gas boiler

All components for Korean boilers are produced in South Korea and Japan. The introduction of innovative technologies and a high production culture allowed the company to become a leading manufacturer of heating equipment in its country. It occupies far from the last positions on the world stage. Navien gas boilers are characterized by a number of positive features:

1. Heat exchangers made of stainless steel. Considering the not the best characteristics of water from centralized supply systems, Korean engineers deliberately chose this material. It ensured the longevity of the devices.
2. Turbocharging system. Stainless steel reduces the cost of a gas boiler and increases its service life. However, compared to copper, its thermal conductivity is lower. Therefore, products from South Korean manufacturers should theoretically have a lower efficiency factor. The use of a turbocharging system, which supplies air in optimal proportions to fuel, equalized the performance. Moreover, the efficiency of Navien boilers is even higher than many analogues with copper heat exchangers.
3. Equipped with SMPT protection. The built-in chip responds to changes in power supply. It neutralizes fluctuations within 30% of the rated voltage. The gas boiler operates stably even with such fluctuations. Naturally, this protection extends the trouble-free service life of the devices.
4. Adaptation to harsh security conditions. The company declares the minimum requirements for stable operation of its products. Wall-mounted gas boilers can operate at a gas pressure of 4 Mbar, water - from 0.1 Mbar. Even such “extreme” conditions are not typical for Russian utility services. But in exceptional cases, Navien boilers are the only heating devices that will provide housing with warm water.
5. South Korean assembly. The boilers of this manufacturer do not contain low-quality components. All parts are produced by the company independently. The only exceptions are TIME valves, which are purchased in Japan.
6. Remote control. Not every European manufacturer can boast of this. Ease of use is provided not only by remote control. The devices are equipped with a liquid crystal display, room thermostat functions, and secondary circuit water temperature control.

It is unlikely that any other global brand among heating device manufacturers will be able to offer such an affordable price for equipment with such characteristics and functionality.

How to choose and what to pay attention to?

Basic parameters for choosing a gas boiler for residential, administrative and industrial premises:

• power - the efficiency of heating the room depends on it;
• type of installation - the brand’s line includes floor and wall models;
• burner type - devices with natural smoke removal of combustion products and are equipped with a closed combustion chamber;
• functionality - there is equipment with the ability to connect a boiler to provide hot water supply;
• additional elements - models are equipped with overheating sensors, screens displaying information about pressure and temperature, remote controls and a display displaying information about the operation of the device.

Common malfunctions and their elimination

E 01-02

This error indicates overheating of the equipment due to the lack of coolant in the system. The solution to the problem is to clean the pipelines or check the pump. Alternatively, it is necessary to remove air from the system (primarily from the pump).

The functionality of the flame sensor is checked. Cleaning ignition electrodes.

It is also necessary to check the presence of gas in the line or cylinders.

A malfunction of the temperature sensor can be eliminated by checking its condition. The resistance of the sensor is measured at a certain temperature. If the readings correspond to the standard ones, it is necessary to clean the contacts.

If the sensor readings do not correspond to the table values, replacement with a new, functional unit is required.

Check if there is power supply at the terminals. If serious problems are detected, the fan is completely replaced.

Most often, the problem lies in the sensor itself. It is necessary to check its condition, clean the contacts, and replace it if necessary.

If there is no result, the sensor is replaced.

Overheating of the boiler can have several reasons, the most common of which is clogging of the heat exchanger and poor flow of the coolant. The protection is triggered at 98°, the alarm is switched off when the boiler cools to 83°.

There are two ways to solve the problem - first, you should clean (in difficult cases, replace) the heat exchanger; if there is no positive result, replace the sensor.

Overheating of the smoke exhaust sensor occurs when the chimney is blocked. The cause may be condensation freezing, strong winds from outside, or foreign objects or debris getting into the chimney. If eliminating interference with the output of combustion products does not bring any results, the sensor should be replaced.

The best Navien gas boilers in terms of price/quality ratio

The reliability of products from this brand is confirmed by numerous customer reviews. When choosing a boiler, it is worth studying the rating of three popular Navien gas boilers.

Navien DELUXE COAXIAL 24K 24 kW

Wall-mounted equipment designed for rooms up to 240 square meters.

Features high performance.

Can be used to supply hot water to 2 points. Made in a compact body.

Equipped with a corrosion-resistant heat exchanger.

Heats water in volumes up to 13.8 l/min at a temperature of 30 - 60 °C.

The temperature in the heating circuit is up to 8 degrees at a pressure of 3 bar. Uses resources economically: consumes 2.58 cubic meters per hour. m of natural gas.

It is possible to use liquefied fuel . Combustion products exit through a coaxial chimney with a diameter of 60/100 mm.

Characteristics:

• power - 9 - 24 kW;
• gas consumption: natural - 2.58 cubic meters. m/hour, liquefied - 2.15 cubic meters. m/hour;
• coolant temperature - 40 - 80 °C;
• dimensions - 44x69.5x26.5 cm;
• weight - 28 kg.

pros

• low price;
• Remote Control;
• fast heating;
• organization of hot water supply.

Minuses

• increase in pressure to a critical level;
• not suitable for heating systems with antifreeze.

Navien DELUXE 24K 24 kW

Device for heating objects up to 240.0 sq.m. m and DHW organizations . Equipped

separate heat exchangers, which is an advantage with hard water.

Operates from a 220 V network. For stable operation, it is recommended to install a stabilizer.

The model is equipped with a closed combustion chamber for a 60/100 chimney . Control is carried out using the remote control.

2.58 cubic meters consumed. m of gas per hour . The boiler efficiency is 90.5%. The gas pressure does not exceed 25 mbar. 13.8 liters are supplied per minute at a temperature of 25°C.

Characteristics:

• power - 9 - 24 kW;
• gas consumption: natural - 2.58 cubic meters. m/hour, liquefied - 2.15 cubic meters. m/hour;
• coolant temperature - 40 - 80 °C;
• dimensions - 44x69.5x26.5 cm;
• weight - 28 kg.

pros

• acceptable price;
• compact dimensions;
• convenient settings;
• remote control.

Minuses

• noisy work;
• flimsy mounting on the valve.

Navien ATMO 24AN 24 kW

A device with an open combustion chamber, suitable for heating residential and industrial facilities.

An additional function is to provide hot water supply. Due to the power of 24 kW, it takes a minimum of time to heat the room.

At the same time, fuel consumption is economical - 2.47 cubic meters. m/hour, and the pressure does not exceed 18 mbar . Up to 13 liters of water are supplied per minute.

The volume is enough for 2 points. The efficiency of the device is 86%, which guarantees its efficiency.

For safe operation, an overheating protection system and gas control are provided.

Characteristics:

• power - 9 - 24 kW;
• gas consumption: natural - 2.47 cubic meters. m/hour, liquefied - 2.15 cubic meters. m/hour;
• coolant temperature - 40 - 80 °C;
• dimensions - 43x72x32 cm;
• weight - 27 kg.

pros

• easy installation;
• convenient settings;
• high quality;
• functionality.

Minuses

• weak control board;
• uneven temperature in the DHW office.

Remote boiler control panel with built-in room temperature sensor

It is worth noting that most competitors sell such an option as a temperature sensor separately. For better adaptation of the boiler, it is recommended to mount the remote control panel at a height of one and a half meters from the floor. You need to choose a place where there are no drafts and where there is no direct sunlight.

The correct air temperature readings to which the sensor reacts and transmits to the electronic control board depends on the chosen location for installing the remote control. The remote control itself is mounted using screws, and is connected to the boiler with only two wires. On the remote control unit you can see all the data on the operation of the boiler, as well as possible malfunctions or errors. Temperature indicators of air, coolant, and water, as well as the exact time, are all displayed on the display.

Before turning on the Navien gas boiler, it is worth checking the reliability of the electrical wiring; among other things, it is necessary to ground the boiler, which will serve as protection against possible electric shock.

The main elements of the lower part of the Navien boiler

1. heating water filter
2. drain plug
3. safety valve
4. make-up tap outlet
5. heating water supply (input) 3/4 inch
6. heating water return (outlet) 3/4 inch
7. hot domestic water 1/2 inch
8. cold domestic water supply 1/2 inch
9. gas supply 3/4 inch.

Recommendations for installing a boiler are quite standard: the easiest way is to make a protective screen from a sheet of metal. A stainless steel sheet is ideally suited for these purposes. The sheet should be installed between the boiler and the wall. The manufacturer prudently includes a mounting strip in the delivery package.

The best double-circuit gas boilers Navien

A double-circuit gas boiler not only heats the house, but also heats the water. This option is suitable if there is no possibility of connecting to a centralized water supply. The rating presents the best models of this type according to consumers.

Navien Deluxe S COAXIAL-16k 16 kW

A practical and reliable device for heating objects up to 160.0 square meters. m .

Connects to 220 V network.

Equipped with a closed combustion chamber. Due to the power of 16 kW, it copes with its task perfectly.

The advantage is economical fuel consumption - 1.72 cubic meters. m/hour . The maximum thermal load of the model is 24 kW.

The coolant heats up to 80 °C. Hot water output depends on temperature: 25°C - 13.8 l/min, 40°C - 8.6 l/min.

Characteristics:

• power - 8 - 16 kW;
• gas consumption: natural - 1.72 cubic meters. m/hour, liquefied - 1.43 cubic meters. m/hour;
• coolant temperature - 40 - 80 °C;
• dimensions - 40x66.5x25.5 cm;
• weight - 28 kg.

pros

• Beautiful design;
• quality spare parts;
• external management;
• simple maintenance.

Minuses

• noisy work;
• The remote control breaks down quickly.

Navien DELUXE 40K 40 kW

Universal equipment for industrial and residential facilities . Effective for

heating rooms up to 400.0 sq. m. and for organizing hot water supply. Due to the weight of 30 kg, installation takes minimal time.

Connects to a 220 V power supply. The efficiency is 91.5%. 4.39 cubic meters are consumed per hour. m of natural and 3.58 kg of liquefied fuel.

The nominal gas pressure is 10 - 25 mbar . Up to 22.9 liters of water is supplied per minute at a temperature of 25°C under pressure up to 8 bar.

Characteristics:

• power - 14 - 40 kW;
• gas consumption: natural - 4.39 cubic meters. m/hour, liquefied - 3.58 kg/hour;
• coolant temperature - 40 - 80 °C;
• dimensions - 44x69.5x26.5 cm;
• weight - 30 kg.

pros

• inexpensive;
• suitable for a private home;
• quickly heats the room.

Minuses

• high fuel consumption;
• noisy work.

Navien DELUXE 16K 16 kW

Heating boiler with frost and heating protection system, gas control and other sensors ensuring safe operation.

Connects to 220V network. It is possible to use hot water at low pressure.

A power of 16 kW ensures the efficiency of the equipment in a room of 160 sq.m. The efficiency of the model is 91.2%.

The water in the coolant heats up to 80 degrees within an hour. Gas consumption depends on the type of fuel: natural - 1.72 cubic meters. m/hour, liquefied - 1.43 kg/hour.

Characteristics:

• power - 9 - 16 kW;
• gas consumption: natural - 1.72 cubic meters. m/hour, liquefied - 1.43 kg/hour;
• coolant temperature - 40 - 80 °C;
• dimensions - 44x69.5x26.5 cm;
• weight - 28 kg.

pros

• high-quality assembly;
• compactness;
• stable operation during power outages;
• quick heating of the room.

Minuses

• noisy;
• external control cannot be connected.

Connection instructions

Installing the boiler is not difficult - you just need to install anchor bolts and hang the unit on the wall.

It is recommended to install elastic gaskets between the housing and the wall to dampen noise. Do not install the equipment on fragile or weak structures - plasterboard partitions or other similar surfaces.

You need a solid brick or concrete wall that can support the weight of the boiler (about 30 kg).

Communications should be connected to the appropriate pipes. It is necessary to carefully monitor the compliance and tightness of connections.

The main attention should be paid to connecting gas pipes. Check all connections for leaks using a soap solution

If there is a common chimney, separate pipeline connections are used - the air channel is led out into the street through the wall, and the smoke channel is connected to the common chimney of the house.

Coaxial chimneys are led outside through the wall, which is much simpler and more convenient for installation.

The best wall-mounted gas boilers Navien

In small rooms you can install a wall-mounted boiler. It can be single- or double-circuit, which allows you to choose a model based on your needs. The rating presents heating equipment with the best characteristics.

Navien Deluxe S COAXIAL-13k

Heating boiler with gas burner, equipped with two offices . Has a power of 13

kW, which makes it effective in rooms up to 130 square meters. The efficiency of the device is 91.2%.

Control takes place using the remote control. Information about the operation is displayed. Fuel consumption is 1.4 cubic meters. m/hour.

In this case, the fuel pressure is up to 25 mbar.

Combustion products are discharged through a coaxial chimney with a diameter of 60/100 mm. Hot water output depends on temperature: 25°C - 13.8 l/min, 40°C - 8.6 l/min.

Characteristics:

• power - 8 - 13 kW;
• gas consumption: natural - 1.4 cubic meters. m/hour, liquefied - 1.16 kg/hour;
• coolant temperature - 40 - 80 °C;
• dimensions - 40x65.5x25.5 cm;
• weight - 26 kg.

pros

• compactness;
• durable body;
• convenient control;
• high performance.

Minuses

• flimsy o-rings;
• loud noise.

Navien DELUXE PLUS 13K 13 kW

A boiler with a closed combustion chamber and a simulated turbocharging system, which reduces fuel consumption.

Only 1.4 cubic meters are consumed per hour. m of natural and 1.16 kg of liquefied gas.

The device is connected to a 220V network, protected by a protection system against changes in power supply and protection against freezing when the water temperature drops below 10°C.

Power of 13 kW provides quick heating of small rooms . You can install an 8 liter boiler. At a temperature of 25°C, the water supply will be 11.5 liters per minute.

Characteristics:

• power - 7 - 13 kW;
• gas consumption: natural - 1.4 cubic meters. m/hour, liquefied - 1.16 kg/hour;
• coolant temperature - 40 - 80 °C;
• dimensions - 45x69.5x26.5 cm;
• weight - 28 kg.

pros

• acceptable price;
• effective work;
• remote control;
• organization of hot water supply.

Minuses

• increase in pressure to a critical level;
• Difficulty finding original spare parts.

Navien Deluxe S COAXIAL-24k

The equipment is universal, as it is suitable for residential and industrial premises with an area of ​​up to 240 square meters. m .

Equipped with a system of protection against freezing and overheating, as well as gas control. The efficiency of the model is 91.4%, which confirms its effectiveness.

The boiler consumes 2.58 cubic meters. m of fuel per hour . Combustion products are removed through a coaxial chimney with a diameter of 60/100 mm.

Water productivity at a temperature of 40 degrees is 8.6 l/min.

Characteristics:

• power - 8 - 24 kW;
• gas consumption: natural - 2.58 cubic meters. m/hour, liquefied - 2.15 kg/hour;
• coolant temperature - 40 - 80 °C;
• dimensions - 40x65.5x25.5 cm;
• weight - 26 kg.

pros

• compactness;
• quiet operation;
• remote control;
• inexpensive.

Minuses

• short cord;
• The display is not backlit.

Wall chaser discs for concrete: types, sizes, application

Discs for wall chasers must be selected taking into account the dimensions of the tool itself and depending on the required depth of the groove.
The main indicators of the size of circles are the diameter and size of the mounting hole. Discs for wall chasers are selected taking into account the size of the tool itself

There are several dimensional options for disks for wall chasers:

• small diameter – 115-300 mm;
• medium – 350-700 mm;
• large – 800-1600 mm.

The mounting holes are generally 22.2 mm in size, less often 25.4 mm. The indicators must correspond to the size of the hairpin on which the circles are put on.

The discs are made of durable steel, with diamond teeth applied to the outer edge by laser welding.

Segmented disks for wall chasers have a diamond addition in the form of sectors, between which there are grooves for cooling and removal of debris

The industry produces four types of disks:

1. Segmental. Diamond addition in the form of sectors, between them there are grooves for cooling and removal of debris.
2. Solid. The edge of the disk is not divided into segments, but holes are used for cooling.
3. For reinforced concrete. The diamond edge is sectored, the discs are significantly thick.
4. Turbo segment. They have a wavy surface, due to which cooling occurs.

The most popular disc sizes for concrete wall chasers are 125, 180, 230 mm. Wheels of 115 mm are used somewhat less frequently, and disks of 300 mm or more are intended for machine cutting.

The best floor-standing gas boilers Navien

A floor-standing boiler is the best option for heating a room from 80 to 800 sq.m. At the same time, the fuel consumption of such equipment is economical. The rating presents the best models according to buyers.

Navien GA 35KN 35 kW

High-performance model for heating rooms up to 350 square meters.

Equipped with a closed combustion chamber for spent fuel.

Has an efficiency of 91.4%. Equipped with sensors to ensure operational safety, including gas control.

Controlled using a remote control . Consumes 3.34 cu. m of fuel per hour. The coolants heat up to 85 °C in a short time.

Hot water output is 12.5 l/min at 40°C.

Characteristics:

• power - 35 kW;
• gas consumption: natural - 3.34 cubic meters. m/hour, liquefied - 2.94 kg/hour;
• coolant temperature - 40 - 85 °C;
• dimensions - 40.2x85.6x63.1 cm;
• weight - 26 kg.

pros

• Beautiful design;
• remote control;
• fast heating;
• durable body.

Minuses

• plaque on the heat exchanger;
• noisy.

Navien GST 49 kW

Multifunctional model for heating a home and organizing hot water supply.

The boiler is connected to a 220 V network.

Consumes 5.5 cubic meters per hour. m of fuel. Suitable for administrative and industrial facilities, as it is a way to heat a room of up to 490 sq.m. in a short period of time.

Gas pressure does not exceed 25 mbar . The coolant temperature is 40 - 85 °C, and the water productivity is up to 28.1 liters per minute. Control is simple using the remote control.

Operational safety is ensured by sensors against overheating and freezing.

Characteristics:

• power - 49 kW;
• gas consumption: natural - 5.5 cubic meters. m/hour;
• coolant temperature - 40 - 85 °C;
• dimensions - 49.1x90.6x76.4 cm;
• weight - 84 kg.

pros

• low price;
• Remote Control;
• high power.

Minuses

• heavy;
• noisy.

Navien GST 60KN 60 kW

Powerful equipment for heating rooms up to 600 square meters.

Made of stainless steel and equipped with high-quality heat exchangers, which guarantees a long service life.

The efficiency is 90%.

The boiler consumes 6.5 cubic meters per hour. m of natural gas .

The use of liquefied fuel is not provided. The coolant heats up to 85 °C. Hot water productivity is high - up to 34.4 liters per minute.

Characteristics:

• power - 60 kW;
• gas consumption: natural - 6.5 cubic meters. m/hour;
• coolant temperature - 40 - 85 °C;
• dimensions - 49.1x90.6x76.4 cm;
• weight - 94 kg.

pros

• quality materials;
• easy operation;
• does its job well.

Minuses

• the expansion tank cannot be connected;
• Cools down quickly when there is a power outage.

Types of Navien gas boilers

Boilers from the Navien brand are classified according to the following criteria:

1. Number of circuits . Single-circuit units are designed for heating rooms. They are installed if it is possible to connect to a centralized water supply system. Double-circuit is designed to provide hot water supply and simultaneous heating of objects.
2. Type of instalation . Boilers are installed on the floor and on the wall. The difference between them is in power and size. Floor-mounted ones are used for heating large areas.
3. Camera design . In models with open chambers, combustion occurs when air enters, so high-quality ventilation is necessary. For devices with a closed chamber, combustion products are forced out.

Installation Features

Consumer reviews also show what features the installation of Navien boilers has. Installation of double-circuit wall-mounted models is a fairly simple and uncomplicated procedure, because the manufacturer includes instructions for such equipment. You can install the boiler yourself.

As reviews show, we should not forget that the installation of navien gas heating equipment requires a number of works carried out only by specialists who control gas consumption. Even with proper installation, the presence of gas company workers is mandatory. This is also necessary to conclude an agreement allowing the installation of a navien boiler, and to obtain permission to operate such equipment.