Gas boiler with own hands drawings

Maintaining comfort and lowering energy expenses in your home requires adequate insulation and heating. A gas boiler is one of the most important parts of an effective heating system. While buying a pre-made boiler is an option, for those with the requisite knowledge and abilities, building your own can be a satisfying project. This post will explain how to build a gas boiler from the ground up, step-by-step illustrated with drawings to help you along the way.

Configuring a gas boiler on your own to suit your needs and budget is possible. Knowing the foundations of boiler design and construction will enable you to customize the system to meet your needs, whether you’re looking to heat a larger commercial space or a small residential property. Furthermore, building your own boiler can be more affordable than buying a prefabricated unit, particularly if you have access to the required supplies and equipment.

It’s crucial to become knowledgeable about safety rules and boiler operation principles before beginning the building process. Because gas boilers deal with combustible materials and high-pressure systems, safety regulations must be strictly followed. You can protect yourself from potential risks and ensure the longevity and efficiency of your DIY boiler by becoming knowledgeable about safe installation practices and precautions.

An essential step in the planning and building stages of your do-it-yourself gas boiler project is producing detailed drawings. These illustrations show the different parts of the boiler system and how they are connected to one another, acting as visual guides. Precise drawings offer a road map for assembly and troubleshooting, from the boiler chamber to the burner assembly and piping layout. This article will help you with every step of the construction process by offering detailed drawings with accompanying explanations.

Building your own gas boiler is a great way to learn more about heating systems and save money, regardless of your experience level with do-it-yourself projects or home improvement endeavors. You can start a fulfilling journey toward building a dependable and effective heating solution for your residence or place of business by adhering to the comprehensive instructions and drawings included in this article.

Gas Boiler Design DIY Drawings
Basic Components Illustrated Schematics

Types of heating boilers

First things first, you need to figure out what kind of boiler your house needs. This will be contingent upon the fuel utilized for stoking. Thus, the categorization:

  • gas;
  • electric;
  • solid fuel;
  • liquid fuel.


You can build any of these boilers by hand. Electricity is the most basic of all of them. This is essentially a tank with a heating element installed inside of it. There are still two spigots coming out of the tank that link to the supply and return circuits. Everything is straightforward; there is no combustion chamber or chimney.

All electric boilers are excellent, but there are two drawbacks. First, the most expensive fuel is electricity. Second, the boiler stops operating properly when the network voltage drops, which happens with enviable regularity. As the coolant temperature drops, so does its power.

The other types have more intricate construction. And, with a few exceptions, they are all essentially alike. Regarding the gas boiler, authorization from the gas service is needed for its installation.

It may not be acceptable for representatives of this organization to install such a heating unit. It will need to perform its pressure test in their laboratory first.

It is a guarantee that you will still be given permission if the act is present.

Boilers on liquid fuel

The operation of this option is challenging. The fuel will be kept in a separate warehouse that you must first construct close to the house. Everything inside needs to be in accordance with fire safety regulations.

Second, a pipeline will need to be pulled from the boiler room to the warehouse. Insulation is a must. Thirdly, this kind of boiler has an installed special burner that needs to be adjusted. Making the necessary adjustments is not so simple.

Solid fuel

These days, home masters most frequently construct these kinds of boilers by hand. The best choice for tiny dachas and cottages is this one. Furthermore, wood is the least expensive kind of fuel by far.

We’ll discuss how to build a solid fuel boiler for home heating below.

What you will need?

As previously stated, you need to be a skilled welder in order to weld the heating unit. Work at the amateur level is inappropriate in this context.


What is needed to complete this task. From the necessary tools:

  • electric welding apparatus;
  • gas torch;
  • bolgar;
  • hammer;
  • tape measure;
  • marker or chalk.
  • seamless pipe with a diameter of 425 mm;
  • pipe with a diameter of 100 mm;
  • 25 mm diameter pipe;
  • metal sheet with a thickness of 4 mm;
  • two bends with a diameter of 25 mm;
  • small hinges;
  • angle piece 25 mm;
  • 8 mm diameter rebar.

Many novices search the Internet or specialized technical literature for boiler drawings and then use them to complete the task. This is, in theory, the proper approach.

The most crucial step is to locate drawings that display the heater’s dimensions.

Our goal in writing this article on "Gas Boiler DIY Drawings" is to give homeowners who want to install or maintain their gas boilers easy-to-follow instructions. We recognize the value of effective insulation and heating in homes, and we think that enabling people to manage boiler projects on their own can result in substantial cost savings as well as an improved comprehension of home systems. We’ll go over important topics like boiler placement, piping diagrams, and safety considerations with simple-to-follow drawings and detailed instructions. Whether you’re an experienced do-it-yourselfer or a novice to home maintenance, this article will provide you the skills and assurance you need to handle your gas boiler project with ease.

Manufacturing of the body

Thus, the components of the upcoming unit are first ready. The heater’s body will be constructed from 425 mm pipe. The ideal height for a small heating boiler is between 1.0 and 1.2 meters, keeping in mind its small diameter.

Using a gas torch, cut the pipe to these dimensions. A bolgar is used to process the edges.

Openings for the furnace and blowhole

Two holes in the body now need to be cut: one for the blowhole and one for the firebox. They have to be square in shape. A firebox measuring 20 by 10 cm or an under-blower measuring 20 by 3 cm would be appropriate. The firebox opening is higher because they are arranged one above the other.

Five to seven centimeters separates the blowpipe from the pipe’s edge. There are five centimeters separating each hole. A bolgar is used to machine the hole’s edges. A section of the furnace tube wall that has been cut out will serve as the door. Its edges are likewise tidy.

Holes for the spigots

Two additional 25 mm-diameter holes are drilled for the supply and return pipes using a torch. The holes are positioned across from one another. In this instance, the return hole is drilled on the boiler’s side above the furnace, 15 cm away from the furnace opening.

Make sure to drill a hole for the coolant supply only 5 cm down from the body’s upper edge. Two bends can be welded to these holes at this point.

Internal parts

A metal sheet is cut into three pancakes: two that have a diameter of 425 mm and one that has a diameter of 412 mm. The latter is to be installed inside the housing; the diameter is 12 mm plus 1 mm for free entry, as the pipe’s wall thickness is 6 mm.

One of the pancakes has a diameter of 425 mm, and a hole with a diameter of slightly more than 100 mm is cut out of the center 412 mm circle. 100 mm of pipe is used to prepare a chimney. A 120–130 mm section is cut for this reason. For the boiler legs, cut 50 mm long pieces of 25 mm pipe. Rebar is used to make an ash pan grate; the inner diameter of the body is used as a reference size.

Assembly of the heating unit

Initially, the 412 mm pancake is welded to the chimney. Next, temporary stops should be welded inside the casing at a height of 30-35 cm from the furnace opening. This could be rebar or wire. They are lowered onto the chimney pancake.

Basic joints

The most crucial step is right now: the pancake and boiler drum need to be welded together. It is necessary to weld the seam from both sides, and it must be done so qualitatively. The interface between the water tank and the furnace is this joint.

After that, a 425 mm pancake is placed atop the boiler’s chimney. Here, two joints that need to be well-welded are those that connect the boiler drum to the pancake’s outer edges and the metal circle to the chimney.

Furnace compartment

This brings us to the furnace chamber stage. The prefabricated rebar grate is installed into the body of the chimney from the rear.

Then, using a bolgar, multiple pieces are cut out of the 25 mm angle and welded inside the boiler, sandwiched between the under-blower and the furnace opening. These are going to be the stops where the grate will rest.

Bottom part of the body

Finally. A 425 mm pancake must be welded to the housing’s bottom edge, and four 25 mm pipe legs must be welded to it, five centimeters high. The furnace door hinges are then welded to the hinges.

Construction for the under-blower latch

The design can take on various shapes, such as that of a standard door, a flap that moves within the plane of the opening, or a rotating flap with holes punched through the body. It sells prefabricated items that only need to be welded into place.

An entire structure can be attached to the boiler by hand weldment. The most straightforward of all the solutions is to use a gate valve or a door.

Testing and connection to the system

The house is ready to be heated with a solid fuel boiler. It needs to be tested right now. This is accomplished by pouring water into the second bend and screwing a plug onto the first bend. The welding has been done to a high standard if water cannot pass through the welds.

You don’t have to worry about the heating unit leaking while it’s running. The country house’s heating system is linked to the prepared unit. In other words, the bends are linked to the heating medium’s supply and return connections.

Installation of the chimney

The chimney installation is completed. Take note that the appliance’s component should emerge vertically upward. Should this arrangement not be feasible, there ought to be a minimum quantity of branches.

It will need to be insulated in an unheated attic.

The first fire

It is crucial that the initial firing be carried out properly. The use of a lot of fuel is prohibited. A tiny tab that heats the unit itself—particularly the chimney—is recommended. Its diameter may narrow if condensation forms on its walls and turns into tar when the temperature rises sharply. And this is a reduction in the draught, which keeps the heater operating properly.

Clearance adjustment

The under-blower clearance is changed during the firing process. The ideal size must be determined in order to supply the furnace chamber with the required quantity of fresh air (oxygen).

Make careful to consider the deposit’s height. Its top edge ought to be 20 centimeters away from the inner pancake. This distance will guarantee coal or wood burning at its best. In this scenario, the chimney pipe will be used freely to expel smoke and carbon monoxide gases.

Principle of operation

A traditional solid fuel boiler functions much like a traditional stove. Moreover, it has a firebox that burns wood, which includes coal, pellets, and other solid fuels. The coolant in the vessel above the combustion chamber is heated by the energy released.

The internal pancake and the chimney, which enters through the water tank, both contribute to the heating of the coolant in this design. The boiler body is heated concurrently, which produces an accumulating effect that prevents the unit from cooling down quickly after it is turned off.

The heated coolant rises and leaves the heating system through the upper branch pipe, entering the supply circuit. Through the lower branch pipe, which is attached to the return circuit, the cooled coolant enters the boiler.

Other options

A 4 mm thick metal sheet can be used to create a solid fuel boiler for home heating in the shape of a cube. This design is more intricate and will require the assembly of a separate furnace chamber. It transpires that the boiler body is equipped with a combustion chamber. Additionally, the coolant will move back and forth between the two buildings’ walls. Although more difficult to produce, this is a more effective option. Its high weld count lowers operational safety and dependability.

Making a heating boiler with your own hands

DIY heating boiler

Apart from purchasing pre-owned heating boilers from reputable, albeit less well-known, international or domestic manufacturers, you can also build your own heating boiler. Additionally, save money on a wide range of options that your heating system might not need. All you need for this are the necessary materials, tools, and equipment, as well as the practical skills to work with them, and an understanding of the device and the working principle of the boiler type you have selected.

The main types of heating boilers

It is possible to construct nearly any kind of heating boiler that one wishes. The most important thing is to choose wisely, which requires understanding the key benefits and drawbacks of the most common kinds of heating equipment. И Heating boilers are thus:

Gas boiler on the floor

It is not advised to manufacture these kinds of boilers on your own because the gas equipment has technical specifications that you are not likely to be able to meet in an artisanal setting.

Electric boiler for the home

This type of heating boiler is quite popular, which can be attributed to its straightforward design and comparatively low installation and operating safety requirements.

High electricity costs are a major drawback of electric boilers. For this reason, these kinds of devices are used to periodically heat spaces, like garages or summer houses.

Homemade boiler for liquid fuel

A boiler of this type does not have an extremely complex design. But before beginning to build a heating unit that runs on fuel oil or diesel fuel, anyone should at least consider twice due to the expense and complexities involved in adjusting the nozzles that feed fuel into the combustion chamber.

Long-term combustion boiler made by hand

These kinds of representatives are best suited for heating a variety of commercial or industrial sector objects as well as private residences. The market’s highest demand is for solid fuel boilers due to their high efficiency and wide range of applications.

The four types of solid fuel boilers are wood, pyrolysis, long burning, and pellet boilers, based on how they operate. Long-burning boilers are the most widely used self-manufacturing option; pyrolysis and pellets are used much less frequently due to the high cost of individual components.

What depends on the design?

The following factors affect how the heating boiler is designed:

  • cost and availability of materials;
  • type of fuel;
  • the way of circulation of the coolant.

The coolant’s natural circulation Coolant forced to circulate Two-pipe heating with coolant circulated directly Two-pipe heating with coolant circulated counter (dead-end)

Heat-resistant stainless steel is the material with the highest level of durability. It is the most expensive product on the market, though, and processing it is a challenging task that requires specialized equipment. This also holds true for cast iron, which is significantly less expensive than stainless steel. Traditionally, 4 mm thick sheet steel has been used in the production of heating boilers. This choice is comparatively simple to handle and, most importantly, very dependable and long-lasting.

The storage tank should be positioned at a height that allows for natural coolant circulation. Heating circuits and large-diameter connecting fittings must be used. If such a chance does not arise, you will need to use a circulation pump, which will cause the pipes’ diameter to decrease. When deciding on the heating boiler’s design and functionality, it is important to consider that the pump system is energy-dependent.

The pipes that come with your boiler should be made of appropriate thick-walled steel pipe, with a minimum diameter of 32 mm. Galvanized steel should be used for the heating circuit, and the threaded connections should be sealed.

Design features of solid fuel heating boilers

DIY wood boiler

A wood boiler is the least expensive option for self-manufacturing. Such a unit is composed structurally of two containers nested inside one another. The outer one serves as a heating tank, and the inner one as a firebox. The wood boiler has an extremely straightforward design and can run on various solid fuels in addition to wood.

The wood boiler’s design comprises:

  • steel firebox (with a door);
  • ash pan (with a door);
  • firebox grates;
  • soot collector;
  • chimney;
  • gate valve;
  • inlet and outlet connections;
  • feet;
  • cast iron cover.

Solid fuel boiler apparatus

The main drawback of a wood boiler is its low efficiency, which results in excessive wood consumption or a persistent lack of heat in the home.

The cost of manufacturing pyrolysis boilers is higher because they require two combustion chambers, one for fuel and the other for pyrolysis gas, and because some of their parts are highly expensive. Nevertheless, because of its affordability—it only needs three to four seasons to pay for itself—such equipment is highly sought after.

The following is the traditional layout of the pyrolysis boiler:

  • combustion chamber with nozzle;
  • gasifying chamber;
  • air supply system;
  • chimney system
  • loading chamber;
  • water heat exchanger;
  • coolant circulation system;
  • temperature and pressure sensors;
  • control valve.

The pyrolysis boiler’s basic working principle

The end of the 20th century saw the invention of pellet boilers. Their basic method of operation, which is based on the use of pressed sawdust, is to transfer heat from the gas released during the latter’s combustion to the coolant in the heat exchanger.

Hands-on heating of a boiler on pellets

Included in a pellet boiler’s design are:

  • casing;
  • furnace chamber with an air window and a cleaning door;
  • heat exchanger with a water circuit;
  • smoke evacuator;
  • insulation gasket
  • automatic control and management system.

Cast iron heat exchangers work best in pellet boilers because they don’t corrode and have a higher heat transfer rate.

How to make an electric boiler?

A thermoelectric heater (TEN), which is essential for converting electricity into heat, is the main component of an electric heating unit. While the electric boiler’s body can be made of any material, its operational components, such as sensors and regulators, must be made of any material. – is available for purchase at any specialty store.

Electric heating boiler device

The electric boiler is composed structurally of:

  • TEN;
  • expansion tank;
  • circulation pump;
  • safety valve;
  • filtration unit.

The electric heating boiler’s operating principle

There must be a height differential between the boiler tank and the radiators in order for the coolant in the system to circulate naturally. Alternatively, a pump can be used to force the coolant to circulate. Installing the heating element straight into the heating system is the most basic type of electric boiler. If this design isn’t appropriate, you could create an electric boiler with a detachable sleeve, which would allow you to get to the TEN quickly in case you need to replace or repair it.

The best option for heating, say, a modest cottage would be a small, independently situated electric boiler. Such a boiler’s pipe will have a diameter of roughly 220 mm and a maximum body length of half a meter. This allows it to be installed almost anywhere, provided that safety regulations are followed.

The electric boiler’s casing needs to be sealed tightly. It has a pipe for the return of cooled water and a hole for the heated coolant to flow into the heating system.

Alternative variants for self-manufacturing

Apart from electric and solid fuel boilers, self-manufacturing boilers can be used for various other types of heating units.

There are primary and secondary windings in these transformers. In a boiler like this, the heat carrier receives energy from the outer winding’s conversion of electricity into eddy current and the resulting magnetic field that travels to the inner winding.

It is thought to be more efficient than gas and even solid fuel boilers since it retains the condensate’s thermal energy. Steam condensation takes place in a unique heat exchanger, which gives these boilers a 15-20% efficiency boost over conventional gas equipment.

These devices first vaporize the waste, which is then burned vapor. The heat exchanger uses the energy thus obtained to heat the heating agent in the heating system. Two major drawbacks of this kind of equipment are its high emissions into the atmosphere and its low efficiency.

Although this equipment has a wide range of applications, producing it independently will require a high level of expertise and a thorough understanding of the fundamentals governing the operation of different kinds of heating equipment. While individual parts of these units can be highly costly, combined boilers typically have a five- to six-season payback period.

Boiler scheme for induction heating Condensing boiler for heating Diagram for a boiler that uses diesel for heating Boiler with combined heating

The standards and safety requirements that apply to the particular type of heating equipment you have selected must be followed when manufacturing any kind of boiler.

Making a solid fuel long-burning boiler with your own hands, video

Heating boiler with their own hands: the necessary drawings and features of products

As many websites discuss, making your own heating boiler is not an easy task. If someone chooses to build a boiler themselves, they will need to meet specific requirements, possess the required equipment and supplies, and be able to draw their own designs for the heating boilers from which a finished product will be made. The most intricate technical structures on Earth were made by human hands, so it should come as no surprise that heating boilers made from scratch using their technical data perform far better than those made in factories.

Since the company was founded with the intention of turning a profit, a product design that, within the constraints of available technology, has the lowest possible production costs has been developed. In self-manufacturing, however, higher quality and thicker steel is typically selected. Nobody typically saves money and buys premium pumps, fittings, and fittings. Additionally, they either develop their own original models or use previously tested ones on the drawings they created for the heating boiler by hand.

Homemade electric heating boilers

The simplest method for creating DIY electric boilers, or electrode or TENs, is to have the required materials and tools along with the ability to work with metal. If the TEN is to be used as an electrical converter, a steel case for installation must be made or chosen. The thermostat, pump, expansion tank, sensors, regulators, and other accessories are all available separately in specialty stores. Heating systems can be either closed or open when using electric boilers.

What is required and how can one make a 220v, reliable, and efficient electric heating boiler with their own hands?

One or more TENS must be positioned in a steel container in line with the blueprints or sketches for the finished product. Even in the initial stages of the project, when the boilers are being heated manually, the drawings should include a means of quickly and simply replacing a burned-out TEN. For instance, a steel pipe with a 220 mm diameter and a body length of roughly 0.5 m could be used to create the body. The TENs are installed in welded flanges that have supply and "return" sockets and seats attached to the ends of the pipe. The return flow is connected to the expansion tank, pressure sensor, and circulation pump.

Features of the power supply of electric boilers

Significant power is used by TENs, typically greater than 3 kW. Therefore, a separate power line needs to be built for electric boilers. Units up to 6 kW in capacity are connected to a single-phase network; larger power values necessitate a three-phase network. A homemade heating boiler is a great choice if you connect it through RCD protection and outfit it with a thermoregulator heating element. It is necessary to purchase and install the thermostat independently when installing conventional heating elements.

Electrode heating boilers

These kinds of boilers yield incredibly simple results. The electrode is installed in this container, and the boiler body is made up of the second electrode. The electrode boiler is connected to the heating system by means of two pipes that are welded into the vessel: the supply and return pipes. Like other electric boiler types, electrode boilers have an efficiency that approaches 100%, but in reality, it is closer to 98%. The "Scorpion" electrode boiler is a well-known topic of debate. Views on the subject range greatly, from extreme admiration to outright rejection of the use of heating circuits.

Electrode boilers are thought to have been intended for submarine heating. The hull of a submarine, to which the heating system is connected, makes an excellent grounding system, and sea water with dissolved salts makes an excellent coolant. In fact, the materials needed to manufacture heating boilers are minimal. This appears to be a very good heating circuit at first glance. However, can it be used to heat homes, and if so, how can one create an electric heating boiler by hand using the "Scorpion" boiler device?

Electric boiler Scorpion

The current that circulates between the boiler’s two electrodes heats the coolant in electrode boilers. An addition of distilled water to the system will cause the electrode boiler to malfunction. A unique salt solution with a specific conductivity of roughly 150 ohm/cm is available for purchase for electrode boilers. If you have the required abilities, it is very simple to construct an electric boiler Scorpion by hand due to the unit’s design.

A steel pipe with a maximum diameter of 100 mm and a maximum length of 300 mm serves as the boiler’s foundation.

This pipe has two spigots welded to it so that it can be connected to the heating system. An electrode that is isolated from the housing is located inside the device. The neutral wire and the protective grounding are connected by the boiler body, which functions as the second electrode.

Disadvantages of electrode boilers

The primary drawback of electrode boilers is the requirement for the use of salt solutions, which has a negative impact on the heating pipes and batteries. In a few years, the heating system might need all new pipelines and radiators, particularly aluminum radiators (you can read more about them here). Pumps for circulation intended for use with pure water or antifreeze are particularly dangerous. The second major drawback of electrode boilers is the extreme risk of electrocution they present unless the body is perfectly grounded. Selling and installing such equipment abroad is prohibited!

Homemade solid fuel heating boilers

Solid fuel boiler demand is increasing in tandem with rising gas and electricity prices, and their costs are rising as well. Self-made heating boilers are an alternative. since they won’t cost as much and won’t perform any worse than goods produced in factories.

Steel is utilized in production because it is not possible to make a cast-iron furnace at home.

It is preferable to use heat-resistant alloy steel, also known as stainless steel, that has a minimum thickness of 5 mm. Metal savings are not worth it, t. к. For many years, the boiler is made specifically for you. You can either make them yourself or start with ready-made drawings.

Constructing or renovating a heating system for your house is a big choice that can affect your comfort level and financial situation. This article delves into the topic of do-it-yourself gas boilers, examining the viability and complexities of building your own heating system. We hope to offer a thorough guide for anyone thinking about taking on this project, complete with in-depth illustrations and explanations.

For homeowners who want to reduce installation costs and have more control over their heating systems, DIY gas boilers present an alluring option. Building your own boiler allows you to customize it to your home’s layout and needs, which could improve its efficacy and efficiency. Furthermore, the project’s practical aspect can be gratifying and instructive, giving people the confidence to manage their home utilities.

But it’s important to approach do-it-yourself gas boiler projects cautiously and well in advance. Before beginning such a project, it is imperative to have a firm grasp of plumbing, gas systems, and safety procedures, even though the provided drawings and instructions can be quite helpful. During construction, mistakes or inaccuracies can result in dangerous circumstances like gas leaks or broken equipment.

To make sure that your plans are sound and in compliance with regulations, it is advisable to consult with professionals or experienced individuals in the field before starting any work. To further avoid any legal or safety issues later on, become familiar with the local building codes and regulations governing gas appliances. Prioritizing safety above all else is crucial when using gas-powered machinery.

In conclusion, even though the thought of building your own gas boiler might be alluring, you must approach the project cautiously, thoroughly investigate your options, and be dedicated to safety. A dependable and effective heating system that meets the needs of the homeowner may be created by combining meticulous planning with the knowledge of experts. Although they can be rewarding and economical, do-it-yourself projects need perseverance and close attention to detail to be successful.

Video on the topic

Blowing boiler, draught amplifier

Code door lock with your own hands 😂😂

boiler for a bathhouse with their own hands drawings

What type of heating you would like to have in your home?
Share to friends
Sergey Ivanov

I like to help people create comfort and comfort in their homes. I share my experience and knowledge in articles so that you can make the right choice of a heating and insulation system for your home.

Rate author
Add a comment