Overview of models of diesel heat guns from the Russian company Resanta

Overview of available models

Resanta is one of the leaders in the production of electrical equipment.Its products have won many awards, and the balanced combination of price and quality has made it popular among domestic consumers. She produces:

• Voltage stabilizers for various needs.
• Electric welding machines.
• Uninterruptible power supplies.
• Measuring equipment and much more.

The production of heating equipment is also carried out - these are diesel, gas and electric heat guns, oil radiators, fan heaters and electric convectors. In our review, we will talk about heat guns from this brand, and about diesel ones.

Heat gun TDP-20000

Diesel heat gun Resanta TDP-20000 is the most low-power model. Its power is only 20 kW. It is mounted on a metal base with wheels, a support stand and a transport handle, which is a fuel tank. The tank capacity is 24 liters. At a flow rate of 1.85 kg/h, this amount is enough for approximately 12 hours of operation. The power of the unit is enough to heat rooms up to 200 square meters. m. with a ceiling height of not more than three meters.

This heat gun, like all others, requires an electrical connection. Electrical energy is used to operate the nozzle and fan. Electricity consumption is minimal. The performance of the heat gun Resanta is 588 cubic meters. m/hour. It is actively used in construction work and heating of non-residential premises.

Heat gun TDP-30000

Before us is a more productive unit with a thermal power of 30 kW. Its productivity is up to 735 cubic meters per hour. This is enough for intensive heating of premises for any purpose. It can be garages, warehouses, facilities under construction and much more.On one refueling of the fuel tank, the gun from Resanta can work up to 8 hours. Power is required to turn on the machine.

Like the previous model, this heat gun is made in a standard form factor - it is a combustion chamber with a burner, dressed in a pipe and placed on the fuel tank. The heat gun is characterized by stable operation, it cannot be called capricious. The fuel in it burns out almost completely, but the presence of ventilation in heated rooms is mandatory - it belongs to devices with direct combustion of fuel.

Heat gun TDP-50000

This is the latest model from Resanta, made according to the scheme with direct combustion of fuel. It is indispensable for heating storage and utility rooms, production workshops, garage workshops. A heat gun is also suitable for heating greenhouses. The manufacturer equipped it with an impressive fuel tank for 56 liters of diesel fuel, fuel consumption does not exceed 4 kg / h. The duration of work from one fully filled tank is 14 hours. The performance of the unit is 1100 cubic meters. m/hour. Resanta's heat gun requires an electrical outlet to operate.

Indirect combustion heat guns

Direct combustion is carried out with the emission of exhaust gases directly into the heated room. The main disadvantage of this type of heat guns is that the combustion products of diesel fuel are characterized by toxicity - no matter how completely they burn. Therefore, the operation of these devices is carried out only in well-ventilated areas. But they also have a certain plus - this is a higher efficiency.

Resanta offers two types of guns for consumers to choose from. One type we have already considered is direct combustion models.Now we will consider samples of indirect combustion. In them, the flame rages in a metal chamber, blown by a separate fan. Exhaust gases are removed under pressure through a connected chimney. The main advantage of the design is the possibility of heating the premises where people work. Disadvantages - increased complexity and weight, the need to equip the chimney, reduced efficiency.

Resanta presented two models of indirect combustion heat guns for consumers to choose from – TDPN-50000 and TDPN-30000. The power of the first unit is 50 kW with a capacity of up to 2000 cubic meters. m/hour. The fuel tank holds 68 liters of diesel fuel, the duration of work on one gas station is 17 hours (consumption 4 kg / hour). In the upper part of the body there is a branch pipe for connecting a chimney pipe.

The heat gun Resanta TDPN-30000 has a capacity of 800 cubic meters. m / h at a thermal power of 30 kW. Tank for diesel fuel - 50 liters. At a flow rate of 2.4 kg / hour, this is enough for 15 hours of continuous operation.

Features of direct heating diesel heat guns

Direct heating guns are the simplest devices that can serve as heat sources. Such designs have an open combustion chamber. A pump equipped with a nozzle is installed inside, due to which a torch effect is provided. Behind these elements is a fan. All the heat that is generated in the process of fuel processing is supplied to the room along with the products of its combustion.

The principle of operation of a diesel gun of direct heating

The principle of operation of the direct heating diesel gun:

1. Diesel fuel from the tank is fed into the heating filter.
2. The compressor transports fuel to the injector.
3. The diesel fuel is ignited by the glow plug.
4. A fan mounted behind the burner draws cold air from the room into the combustion chamber where it is heated.
5. The protective grid located in the front of the device delays the flame, preventing it from penetrating outside the combustion chamber housing.
6. After heating, the air is fed back into the room.

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The principle of operation of a direct heating gun is quite simple. It is efficient and understandable. However, such guns have one significant drawback. All combustion products enter the room, so it is not recommended to use devices in living rooms. Direct heated guns are suitable for open areas and spaces with a good ventilation system.

Average prices of diesel guns for space heating (direct heating designs):

Brand	Model	Power level, kW	price, rub.
Resanta	TDP-20000	20	11890
TDP-30000	30	13090
Ballu	BHDP-10	10	13590
BHDP-20	20	14430
BHDP-30	30	17759
Master	B 35 CEL DIY	10	21590
B35 CED	10	21790
B70 CED	20	31260

Heat guns can be used for year-round heating of greenhouses

Diesel heat gun: choice of power

The choice of power depends on how you are going to use the unit. If the goal is to maintain the temperature, consider it standard. Usually - 1 kW per 10 square meters. If the goal is to quickly raise the temperature “from minus” to a comfortable level, it is necessary to take two to four times more power. The more power, the faster you will reach the desired temperature. Just keep in mind that fuel consumption will be greater, and the price of the unit, too.

Heat gun power selection table depending on the area and the required temperature difference

If you take "average" for your case, there is a simple formula by which you can calculate the required performance more accurately.

The formula for calculating the power of a heat gun

Questions can only arise when determining the coefficient of thermal conductivity. In general, this value is calculated based on the material of the walls, ceiling and floor. But the calculation is long and complicated. But you can take something like:

• from 0.6 to 1 with well-insulated walls (according to recommendations for your region);
• from 1.1 to 2 with normal insulation (a two-brick brick wall without additional insulation is considered as 2);
• from 2 to 3 with insufficient insulation (a brick in one row is 2.5);
• dilapidated, metal buildings - from 3 and above.

When choosing a coefficient, one must also take into account the degree of insulation of the floor, ceiling, doors and windows. If a lot of heat goes through them, increase the coefficient. If they are well protected from heat leaks, reduce.

Features of the repair of diesel guns for space heating

Repair maintenance of a diesel-fueled plant can result in a significant amount of money. Only one diagnostic procedure costs about 1000 rubles. For this reason, many owners of garages and storage facilities resort to self-repair of structures.

How to repair a diesel heat gun yourself

If warm air does not move, the fan motor may be defective. Repair involves stripping the terminals, checking the winding on the motor (an analog tester is suitable for this), as well as insulation. Sometimes the damage is so serious that a superficial adjustment is not enough. In such cases, one thing remains - replacing the engine.

An important part of the design are nozzles.The quality of the work of these elements depends on the full functioning of the entire heating system.

These parts rarely break, and you can buy new elements to replace failed ones at any store.

Modern diesel, gas and electric heat guns are equipped with a convenient control panel that allows you to adjust the air heating temperature

Much more often, the need to repair a diesel gun arises due to filter clogging. To eliminate this breakdown, it is enough to open the body of the structure, unscrew the plug and remove the contaminated element. After washing with pure kerosene, the filter is ready for further operation. Before installing this part in place, it is advisable to blow it out with a jet of compressed air.

Rules for the safe operation of diesel appliances

When operating diesel appliances, it is very important to adhere to basic safety requirements. A container filled with fuel must not be placed closer than 8 m from sources of open fire and any heating devices.

A room with a working cannon must be left at the first appearance of these symptoms:

• severe dry mouth;
• pain and discomfort in the nose and throat, as well as the eye area;
• headache that appeared suddenly;
• nausea.

Professional model of a heat generator on diesel fuel from the Master company

The presence of carbon monoxide in a closed room negatively affects the condition of people suffering from diseases of the cardiovascular system, lungs. The presence of pregnant women and patients with anemia in the room where the gun is working is not allowed.

Due to their efficiency, diesel guns are so in demand on the market.By following the basic rules of operation, you can avoid health problems. Otherwise, the use of a diesel gun is not dangerous. A high-quality device with suitable technical characteristics can provide a garage or warehouse with efficient heating for many years. The design of these devices is so simple that most of the breakdowns that occur during operation can be eliminated by the owner without the intervention of specialists.

Which brand of heat gun is better to buy

In the early 1990s, all products were supplied mainly from Western Europe and Asia. In the 2000s, good alternatives from the development of climate technology began to appear on the CIS market. And for more than 15 years, some Russian brands have been successfully competing with their foreign counterparts, while adhering to a sparing pricing policy. Who they are, these leaders, you will learn from this list:

• Resanta - the birth year of the Swiss company is 1932. It is a leader in the manufacture of heaters for both commercial and private use. It provides a 3-year warranty on all of its products.
• Ballu is a leading manufacturer of HVAC equipment for the home and industry, founded in 1980 in Thailand. The geography of sales of its products covers all of Europe, Asia and partly even North America.
• Frico is a European brand under which equipment is created to control and manage the temperature in the room. All products have AMCA and ISO quality certificates.
• Master is a manufacturer of air handling systems for both large and small areas. It offers both direct and indirect heating models.
• Kraton is one of the few Russian brands that produce climate equipment from the “budget” category and at the same time of European quality. The firm has been operating since 1999 and has representative offices in 80 cities of Russia.
• Zubr is another Russian manufacturer of construction tools and equipment that has its own laboratory for pre-sale product testing.
• Interskol is a company that manufactures construction equipment and tools, has its own factories and showrooms. This is the only brand in the CIS in its niche, officially recognized by the EU.
• Sibtech is a company established in Russia, which takes into account the needs of the country's consumers in the production of goods. All products are made of high quality materials and alloys.

Description of species

direct heating

The direct-acting unit operates according to the following scheme:

• the user pours diesel fuel or purified kerosene into the container, turns on the unit and sets the desired air heating parameters;
• the fan starts, as well as the fuel module; after that, diesel fuel begins to be supplied from the tank to the nozzles, where it is mixed with air;
• in the form of a fine dispersion mist, a warm air mixture enters the internal combustion chamber and is ignited using an electric glow plug;
• the photocell of the electrical circuit detects the ignition of the fire and after a few seconds the controller turns off the ignition electrodes;
• the main volume of the air mixture, as it were, washes the walls of the chamber from the outside, after which the heated air from the muzzle of the gun comes out; at this moment, a smaller part of the total air volume is burned and emitted as exhaust gases.

If the burner goes out, for example, after the liquid fuel runs out, the photosensor works again and sends a command to the control unit. After that, the latter immediately stops the pump, and after 15-20 seconds the equipment turns off. Combustion can spontaneously turn off if the thermostat fixes the heating of the surrounding space to the desired level. As soon as the room cools down, the burner will start working again.

However, along with the heat, soot enters the room, as well as an unpleasant smell. That is why the scope of use of such devices is limited to open areas where people are very rare.

indirect heating

Such a design assumes a closed combustion chamber, as well as a chimney, which will allow spent fuel exhaust to be removed outside the heated space. Fan heaters of this group have a slightly different principle of operation, namely:

• the combustion chamber is covered on all sides, the refractory plate is hermetically fixed and, in fact, becomes the front panel of the furnace
• the air is heated exclusively by the outer wall of the chamber;
• all combustion products through the upper pipe are brought out;
• the thermal gun must be connected to the chimney.

The removal of exhaust gaseous substances makes it possible to use this unit for heating enclosed spaces with poor ventilation.

However, we draw attention to the fact that it is still not worth heating residential areas with such a gun, since they do not have a draft sensor, as well as automation that can protect people from waste. The efficiency of indirect heating units is slightly lower, it does not exceed 60%, but they can be used in greenhouses, as well as on livestock farms

Liquid fuel heat guns: types, device

Diesel fuel can be bought, perhaps, everywhere. This explains the high interest in heating units of this kind. But it must be remembered that during combustion there is always a smell and burning. Yes, and the cost of heating will be higher when compared, for example, with similar units running on liquefied gas. Therefore, in most cases, a diesel heat gun is bought as a temporary option - to heat a building under construction, a garage. Such units are convenient for heating warehouse and industrial premises. With well-functioning ventilation, direct heating guns can be used. They have an efficiency close to 100%, but the combustion products remain in the room. Therefore, well-functioning ventilation is necessary so that the concentration of harmful substances does not exceed permissible limits.

Scope of the heat gun on diesel fuel

For heating residential buildings, diesel guns are used very rarely. If used, then only models with exhaust gases. They are also called indirect heating. They have a lower efficiency (80-85%), but the combustion products are discharged outside the room. To do this, a chimney pipe is connected to the outlet pipe of the combustion chamber, which is led out into the street.

Direct heating - high efficiency

The diesel heating gun of direct heating has a very simple device. There are two key devices - a fan and a burner. They are built into a metal case. The body most often has the shape of a cylinder and looks very much like a cannon.

Direct heating diesel heat gun device

Fuel is supplied to the nozzle, where it is sprayed, mixed with air. The resulting mixture is ignited. In well-designed/calculated designs, the flame does not break out of the combustion chamber. Only heated air comes out. To increase the heating efficiency, there is a fan behind the nozzle that drives air along the combustion chamber.

As can be seen from the design, combustion products enter the room

Therefore, it is very important to use high-quality fuel. One option is kerosene

It has a less unpleasant odor, emits less soot. Nevertheless, the smell, soot, burning of oxygen - all this is present, even if it is heated with kerosene.

Indirect heating - with removal of combustion products

A diesel gun with an exhaust outlet differs only in that the combustion chamber is sealed relative to the room. Combustion products are discharged through a pipe in the upper part. A chimney is connected to this branch pipe, which must be taken out into the street.

How is a diesel fuel heat gun with gas removal (indirect heating)

The air driven by the fan flows around the body of the combustion chamber and heats up. This heats up the air in the room. It is clear that this is far from being as efficient as in the previous design, but much safer. Although ventilation is still needed, since oxygen is still taken from the air. But the exhaust does not remain in the room.

Features of the repair of diesel guns for space heating

Repair maintenance of a diesel-fueled plant can result in a significant amount of money. Only one diagnostic procedure costs about 1000 rubles. For this reason, many owners of garages and storage facilities resort to self-repair of structures.

How to repair a diesel heat gun yourself

If warm air does not move, the fan motor may be defective. Repair involves stripping the terminals, checking the winding on the motor (an analog tester is suitable for this), as well as insulation. Sometimes the damage is so serious that a superficial adjustment is not enough. In such cases, one thing remains - replacing the engine.

An important part of the design are nozzles. The quality of the work of these elements depends on the full functioning of the entire heating system. These parts rarely break, and you can buy new elements to replace failed ones at any store.

These parts rarely break, and you can buy new elements to replace failed ones at any store.

Modern heat guns are equipped with a convenient control panel that allows you to adjust the air heating temperature.

Much more often, the need to repair a diesel gun arises due to filter clogging. To eliminate this breakdown, it is enough to open the body of the structure, unscrew the plug and remove the contaminated element. After washing with pure kerosene, the filter is ready for further operation. Before installing this part in place, it is advisable to blow it out with a jet of compressed air.

Rules for the safe operation of diesel appliances

When operating diesel appliances, it is very important to adhere to basic safety requirements. A container filled with fuel must not be placed closer than 8 m from sources of open fire and any heating devices. Important! Do not use gasoline instead of diesel

Volatile components of this substance increase several times the likelihood of an explosion.

Important! Gasoline instead of diesel is not allowed. Volatile components of this substance increase several times the probability of an explosion. A room with a working cannon must be left at the first appearance of these symptoms:

A room with a working cannon must be left at the first appearance of these symptoms:

• severe dry mouth;
• pain and discomfort in the nose and throat, as well as the eye area;
• headache that appeared suddenly;
• nausea.

Professional model of a heat generator on diesel fuel from the Master company

The presence of carbon monoxide in a closed room negatively affects the condition of people suffering from diseases of the cardiovascular system, lungs. The presence of pregnant women and patients with anemia in the room where the gun is working is not allowed.

Due to their efficiency, diesel guns are so in demand on the market. By following the basic rules of operation, you can avoid health problems. Otherwise, the use of a diesel gun is not dangerous. A high-quality device with suitable technical characteristics can provide a garage or warehouse with efficient heating for many years. The design of these devices is so simple that most of the breakdowns that occur during operation can be eliminated by the owner without the intervention of specialists.

The best diesel heat guns

After studying the reviews and opinions of users, we included the following devices in the rating of diesel heat guns.

Master B 100 CED

Main characteristics:

• Maximum heating power - 29 kW;
• Maximum air exchange - 800 m³ / hour;
• Protective functions - shutdown in case of overheating.

Frame.This heat gun is mounted on a two-wheeled trolley with a pair of handles for ease of movement. A fuel tank with a volume of 43 liters is fixed from below. Own weight of the unit is 25 kg with dimensions of 1020x460x480 mm.

Engine and heating element. The heater uses the energy of combustion of diesel fuel or kerosene. The maximum liquid flow rate is 2.45 kg/h. A full charge is enough for 14-16 hours of intensive work. The thermal power of the gun is 29 kW. It is enough to heat rooms up to 1000 m3 in winter.

For greater reliability, the burner and combustion chamber are made of stainless steel. Air is supplied in the amount of 800 m3/hour. Its outlet temperature can reach 250°C. The fan consumes 230 W of electrical energy.

functionality and management. For ease of operation and user safety, the unit is equipped with an electronic flame adjustment unit with a lock in case of extinction, a fuel level control device, and overheating protection. It is possible to work in automatic mode with adjustment according to the readings of the built-in or remote temperature sensor.

Advantages of Master B 100 CED

1. High thermal power.
2. Reliability.
3. Easy start.
4. Stable work.
5. Economical fuel consumption.

Cons of Master B 100 CED

1. Large dimensions. For transportation in the trunk of a car, you have to disassemble the structure into its component parts.
2. High purchase cost.

RESANTA TDP-30000

Main characteristics:

• Maximum heating power - 30 kW;
• Heating area - 300 m²;
• Maximum air exchange - 752 m³ / h;
• Protective functions - shutdown in case of overheating.

Frame. This model of the well-known Latvian brand consists of a 24-liter fuel tank and a cylindrical nozzle placed above it. All main elements are made of steel with coloring with heat-resistant compositions. The device weighs a little more than 25 kg, occupying a space of 870x470x520 mm.

Engine and heating element. The heat gun runs on kerosene or diesel fuel. Their maximum consumption reaches 2.2 l / h, while the thermal power is 30 kW. The battery life is 10-12 hours, which is more than enough to heat a large room during a work shift. To improve air exchange, a built-in fan with a capacity of 752 m3 / h is used with an electricity consumption of only 300 watts.

functionality and management. The heater control panel consists of a start switch and a mechanical power regulator. The protection system includes a flameout lockout and an emergency shutdown in case of ignition.

Advantages of RESANT TDP-30000

1. Robust design with the ability to disassemble and assemble.
2. Simple control.
3. Economical fuel consumption.
4. High power with not the largest dimensions.
5. Acceptable price.

Cons of RESANT TDP-30000

1. There are defective products.
2. No transport wheels.

RESANTA TDP-20000

Main characteristics:

• Maximum heating power - 20 kW;
• Heating area - 200 m²;
• Maximum air exchange - 621 m³ / h;
• Protective functions - shutdown in case of overheating.

Frame. Another model from the same manufacturer is a set of a fuel tank with a capacity of 24 liters, with a power unit with a thermal power of 20,000 W, mounted on a fixed support with a handle.It weighs just over 22 kg and has dimensions of 900x470x540 mm. All steel parts are painted. To avoid burns in case of accidental contact, a small gap is made between the nozzle and the outer wall.

Engine and heating element. The liquid nozzle is designed for a maximum kerosene or diesel fuel output of 1.95 l/h. For proper combustion, it needs an excess of air, which is supplied from a built-in fan with a maximum flow rate of 621 m3 / h.

functionality and management. The device is controlled by a start key and a power regulator. For safe operation, the manufacturer has provided a lock in case of emergency ignition or accidental extinction of the nozzle flame.

Advantages of RESANT TDP-20000

1. Quality materials.
2. Good build.
3. Safety.
4. Good power.
5. Convenient management.
6. Affordable price.

Cons of RESANT TDP-20000

1. There is a marriage.
2. No transport wheels.

The device and principle of operation of a diesel heat gun

The heat gun is a universal device for space heating. The principle of operation of such structures is quite simple: diesel burns inside the heater, as a result of which heat is generated, which is supplied to the room by a powerful fan.

Diesel fuel is used as fuel. Some models are able to run on used and filtered oil or kerosene. Due to the progressive internal design, these designs have high power and efficiency, which reaches almost 100%. All diesel heat guns are dependent on electricity.Some low-power models can operate on 12V or 24V, but most models require 220V to function properly.

Electricity is used to start the burner. In addition, it is necessary for the transport of heat due to the rotational movements of the fan. The burner not only atomizes the fuel, but also contributes to the air supply. As a result of this process, a mixture is formed that is highly flammable. Thanks to this, the flame is stable.

The principle of operation of an indirect heat gun is that the air blown by the fan passes through the combustion chamber and enters the room already heated, and the spent diesel fuel products are removed from the room through the chimney.

The affordable price of diesel guns and the possibility of efficient heating of rooms devoid of a central heating system have made these designs so popular. This type of equipment is capable of generating a large amount of heat, due to which the scope of its application has expanded.

Note! Solar powered guns cannot be used to heat residential areas.

Scope of diesel structures:

• heating of warehouse type premises;
• backup heating at poorly insulated facilities in cases where frosts uncharacteristic for the area occur;
• heating of construction sites where heating has not yet been installed;
• organization of heating in hangars used for storage of equipment;
• installation of stretch ceilings;
• heating of greenhouse structures used for growing crops.

In addition, you can buy an indirect heating diesel gun to organize heating in the garage.

Scheme of the device of a thermal diesel gun of indirect heating.

Three types of diesel heaters

The combustion of diesel fuel for space heating has been practiced for a long time. Remember at least the OV-65 type air stoves installed on the army closed trucks of the Ural and ZIL brands. New diesel heat generators use a similar principle, only they are made from modern materials and equipped with electronic automation.

The forerunner of modern heating guns is an automobile diesel stove placed on a stationary frame.

A solar heat gun burns diesel and heats air driven through a cylindrical combustion chamber by an axial fan. According to the method of heating and the emission of flue gases, the products are divided into 3 groups:

1. Direct fired guns emit smoke into a heated room. Accordingly, the use of such air heaters inside the dwelling is unacceptable.
2. Heat generators of indirect heating are equipped with a side branch pipe for connecting a chimney and removing combustion products to the outside.
3. Infrared heating devices also pollute the air by releasing exhaust gases into the room. The difference from previous models is the increased area of ​​the heating plate, which produces radiant heat.

Let us consider in detail the device of each type of heaters, then we will analyze their pros and cons.

Principle of direct heating

A gun of this type consists of the following elements:

a cylindrical body of the heater and a tank with diesel fuel are attached to the metal frame (usually equipped with wheels);
in front of the housing there is a combustion chamber made of stainless steel or ceramics;
on the back of the chamber there is a fuel injector, a glow plug and a photoelectric flame sensor;
a plate is provided on the front side of the furnace, reflecting an open flame;
in the rear half of the case there is a fan - an air blower, a fuel supply system and an electronic control unit with a thermostat.

The air diesel heater is connected to the mains 220 volts with a conventional cable and starts with just one touch of a button and setting the room temperature controller. How a diesel gun works:

The principle of operation of a gas heat gun

With the help of an electric motor, a fan is started, sucking cold air into the gun. Fuel, in the form of gas, enters the burner through the reducer. Ignition occurs by means of a piezoelectric element (the safety of the unit is ensured by an automatic system with a temperature sensor that stops the gas supply if the flame goes out). The streams of heated air passing through the gun are pushed out with the help of a fan.

Some features of gas heat guns

• Possibility of quick connection and replacement of the gas cylinder
• Stable operation even in severe frost (in the worst case, you need to shake the bottle)
• The efficiency of the device is close to 100%

It is important to remember that during the operation of the unit, oxygen in the room burns out, therefore, when heating, people should not be in the room, and after the unit is completed, ventilation is necessary

What it is?

Production, garage and storage facilities rarely have centralized heating. The lack of heating can be filled with other devices. As an effective alternative, you can purchase a diesel gun. Scope of use of diesel structures quite wide, it includes the following:

• heating of warehouse complexes;
• an additional source of heat on poorly insulated objects in cases where atypical colds occur in the region;
• warming up construction sites at the stage when heating has not yet been connected to them;
• organization of efficient heating in hangars;
• heating greenhouses and greenhouses.