It is good when a country house or cottage is connected to a centralized gas main. Convenient, almost no maintenance hassle. And if you need an autonomous system? Cutting wood, fiddling with coal on a frosty morning is not very pleasant. The search for alternatives begins. And for many users it is difficult to make a choice: pellets or gas holder which will be better in a particular case.
If you are also in search of the best solution, we will help you sort out the issue - in this article we compare fuel in terms of price, quality, efficiency. We will touch upon the cost of the equipment itself, its installation, ease of operation, as well as reliability and safety. Let's see what is more economical and in what cases, why it is important to take into account the peculiarities of the region. We summarize all the review data in a table to visually assess the advantages and disadvantages of systems.
General information about the gas tank and pellets
Pellet boiler runs on "modernized" wood. These are wood fuel granules from pressed sawdust, wood chips, shavings.
According to safety rules for the storage of pellets, it is necessary to equip a separate room with minimal moisture indicators.
The pellet boiler has a burner, a hopper, it is equipped with automation. It can work autonomously for a week if there is an auger that continuously supplies fuel to the boiler. There are models with remote control
The gas holder in a simplified description is a container for storing liquefied petroleum gas.
The gas tank design includes: an automatic system for adjusting pressure, volume, gas distribution in the system.
The gas holder is installed mainly horizontally and underground. It must be placed at a distance of at least 10 m from residential buildings and at least 5 m from household buildings
Comparison of fuel and equipment
Let's make a comparison of pellets and gas tanks for clarity. In a comparative review, we take the following data as a basis. For heating an area of 10 m2 with a ceiling height of 3 m, 1 kW of energy is needed. Additionally, you can consider the margin of 15-20%, which will be used for heating water.
The average operating time of boiler equipment is 10 hours / day. The duration of the heating season in central Russia is 7-8 months. in a year. The rest of the time the boiler is used to heat water and maintain the minimum temperature in the rooms at 8 degrees.
Criterion # 1 - fuel efficiency by efficiency
1 kg of pellets is equivalent to 1.6 kg of firewood and emits 5 kW of energy during combustion. If the area of the house is 100 m2, 10 kW per hour is needed, i.e. 2 kg of pellets.
The average efficiency of such fuel ranges from 50-90%. Efficiency depends on the heat loss of the building, the quality characteristics of pellets and other factors. These are the lowest rates when compared with electricity and gas.
Good pellets are smooth, shiny in appearance, have no longitudinal cracks, hard to break, 6 mm in diameter. But it is impossible to guarantee quality even in a batch from one supplier.
Another nuance is the variety of pellets. They are white, industrial and agro. The former have low ash content; when using them, the boiler requires cleaning once a month. Agro are made from sunflower, buckwheat, they are the most "dirty", but cheaper than the rest.
Comparison of pellets from different raw materials
Fuel | Lower calorific value, kW / kg | Ash content,% |
Wood chips | 3,9 | ≤3 |
Straw pellets | 4,18–4,68 | 4,4–7,0 |
Wood Pellets | 4,7 | ≤2 |
Pellets with composition: 70% - straw; 30% - wood. | 4,32–4,67 | <5,11 |
Agropellets | ≥4 | <6,0 |
Corn cobs | 3,6 | 1,0–3,0 |
Why does it matter? The choice of boiler, efficiency and fuel cost depend on the availability of a particular type of pellet. White granules are expensive, but they have the highest calorific value.
But liquefied gas shows a stable 97%. Fuel is supplied evenly, the process is fully automated. The system does not depend on network differences, accidents on pipelines, gas quality is almost always high. 1 kg of liquefied gas produces 12.8 kW of energy.
Criterion # 2 - the cost of heating per season
A ton of pellets is sold at a price of 8-9 thousand rubles. Take the average - 8.5 thousand rubles.
For the heating season of 8 months. we get the following numbers:
- losses - 28,224 kW / h;
- fuel consumption - 5644 kg;
- amount - 48 thousand rubles.
We add the cost of delivery - from 7 thousand. For the removal of waste will need to pay from 5 thousand. We get 60 thousand for the heating season. If you need the services of a stoker, this will entail additional costs in the amount of 10 thousand per month.
One liter of LPG (liquefied gas) costs 18-20 rubles. already with delivery. On 1 m2 area leaves an average of 27 liters per season. T. gas tank volume of 2700 liters should be enough for the entire heating period. Is this really so?
The capacity of the gas tank is refueled by a maximum of 85%. The volume of the residue should vary between 25-30%. Therefore, a tank of 2700 liters with active use will need to be refilled twice per season
The total cost of LPG is 49-54 thousand per year. In more detail about the gas flow from the gas tank, we described in the next article /
So what is cheaper to heat - gas or pellets? At a price gas is a little more expensive, but pellets require additional effort and expense.
Criterion # 3 - the cost of pellet and gas boilers
We will deal with the cost of equipment. The spread in prices of the pellet boiler is large: from 40 to 100 thousand and above.
You can include in the system a conventional solid fuel boiler, potbelly stove or buleryan. But such designs need to upgrade the grate.
There are several ways to reduce cracks so that granules do not fall out:
- replace the grate;
- lay a wire mesh on top or bottom;
- insert overlays.
Pellets will burn under such conditions, but in the absence of constant forced air exchange and maximum supply, some of the pellets can literally fly out into the pipe due to natural draft.
Pellet boilers with automation are more expensive - from 150 thousand rubles, but they are comfortable to operate and able to maintain a stable temperature in the rooms. If there are power outages in the region, take a look at simpler models
And you also need delivery, installation and connection, as well as debugging of the pellet boiler. All this will cost another 23-25 thousand. Total we get an average value of 175 thousand. But you also need to equip a room for storing pellets - fuel supplies take up quite a bit of space.
More advantages and disadvantages of heating with a pellet boiler, as well as recommendations for its choice, we have given in our other article: Pellet heating boilers: types, advantages and rules for choosing the best boiler
For the heating season, 5-6 tons of pellets are needed. 1 ton of such fuel takes 1.5 m3, t. for storing bags, packages you will need a separate room of several square meters. m
For house maintenance in 100 m2 enough gas tank with a capacity of 2700 liters. The price of the tank is 155-165 thousand. Plus, the cost of a gas boiler is from 40 thousand. We get approximately 260 thousand rubles.
Earthwork, installation of a gas tank, delivery and other organizational work will cost another 60-70 thousand rubles.
Criterion # 4 - ease of use of systems
Pellet heating implies the presence in the household of a person who will search for fuel, store it, load, monitor the combustion process, clean the boiler, and remove waste.
Some of the actions can be automated if you select a boiler with automatic feed and the ability to schedule a fuel supply schedule.Then the pellet can be loaded once a week, but this will entail additional equipment costs.
1 ton of pellets, depending on the ash content, gives about 5 kg of waste. Even a boiler with good automation does not completely eliminate the need to clean it. Plus, in addition to buying the appropriate equipment, you will need electricity to service the system.
Choosing a heating system, it is worth starting from the region. LPG delivery is everywhere and at about the same cost. But the price and availability of pellets depends on the area
The gas tank is refueled 1-2 times a year, the process takes a couple of hours, then the system works independently. LPG does not need to be loaded, it moves through the pipes itself and gives heat.
The tank is located underground and does not take up space; it does not need a separate storage room.
But the gas holder requires inspection twice a year: in spring, in autumn. If necessary, cosmetic repairs are carried out.
Often, the companies that install the tanks offer free maintenance for the first year. Then a contract for 12 months is concluded. with a monthly fee of 12-13 thousand rubles, which includes an emergency exit. One-time maintenance costs 3.5-4 thousand rubles.
To see a detailed analysis of the pros and cons of heating with a gas tank, please click on this link.
Criterion # 5 - Reliability and Security
Solid fuel and pellet boilers are reliable under two conditions: there are fuel reserves and the person serving the system. Plus, in the absence of pellets, such equipment can be loaded with other solid fuels: firewood, coal.
There is no doubt in reliability and gas tank. Evaporation of gas occurs even at the lowest temperatures. The human factor does not affect the process.
Problems with the gas tank arise due to improper selection or installation of the tank. It matters the height of the nozzles, an accurate calculation of the depth of immersion of the installation. If you choose the right capacity, gearbox, carry out a quality installation, there will be no complaints
Regarding safety, when using a solid fuel or pellet boiler, there is a risk of carbon monoxide poisoning. When the boiler room is located in the house, you need to be prepared to respond to smoke at any time: open windows, doors, reconfigure equipment. Therefore, it is advisable to install a carbon monoxide detector immediately with the installation of the boiler.
LPG is safe when stored properly. In the event of a leak, liquid gas goes into the ground, because it weighs more air.
Leakage is possible when operating an old tank with worn seams. Plus, it is important when installing to observe the rule of placing the gas tank away from stray currents and heating mains (SP 62.13330.2011).
But in the room where gas-using equipment is installed, gas leakage can occur for various reasons - breakdown of the boiler, stove, leakage of the connections, etc. In order to detect it in time, it is advisable to install a gas leak sensor.
Summary comparison table
The above calculations are relevant for a house in 100 m2. Costs do not reflect all options; the real climate is influenced by the region’s climate, the severity of winter, and the level of thermal insulation of the house.
Parameters | Pellets | LPG (gas holder) |
Efficiency | 50-90% | 97% |
Fuel cost | 48 thousand per year | 49-54 thousand per year |
Cost of equipment | from 40 thousand rubles | from 155 thousand plus a gas boiler |
Connection | Boiler installation | Installation of a gas tank on the site and a boiler in the house |
Ease of operation | We need regular fuel loads daily or once a week. The quality of the pellets is important. | Full autonomy after refueling 1-2 times a year. |
Reliability | High | High, problems can arise only if the wrong choice and installation |
Safety | Carbon monoxide hazard | High, no risk |
Electricity addiction | Yes | No |
Fuel warehouse | Need | Not needed |
Service | Loading, cleaning | Tank refueling, inspection twice a year |
A bunch of gas holder plus a gas boiler provides ease of use, a certain independence from external factors (electricity, quality of pellet production). But it implies the availability of free space on a site far from residential premises and the implementation of such a project will cost more than a "competitor".
Pellet equipment is cheaper, as is the fuel itself. But it requires high quality pellets, ongoing maintenance or additional costs for modernization. At the same time, it gives low efficiency, when compared with a gas holder. But a gas boiler also requires annual maintenance.
We also recommend that you familiarize yourself with the comparison between the gas tank and the main gas.
Operating experience of a pellet boiler Zota Pellet 15s with remote control worth 165 thousand rubles.
Installing a gas tank with some nuances and connecting equipment to it.
Part 1:
Part 2:
When choosing what to install - a pellet boiler or gas holder, consider all factors of economic benefit and operating conditions.
The amount for the purchase of equipment, its installation, connection refers to one-time costs. The cost of fuel and the operation of equipment are already fixed costs, and they are the ones that hit the family budget the most.
What kind of fuel do you use? Share your experience with other users - the feedback form is located below.
If you still have questions about the topic of the article, ask our experts and visitors to our site in the comments section.