Characteristics
| Manufacturer | Resanta |
|---|---|
| Model | OK-1500SN |
| Type | convector heater |
| Country of Origin | China |
| Guarantee | 1 year |
| Life time * | 5 years |
| Power | 1500 W |
| Heating element type | needle-shaped (stitch) |
| Heating area | 20 m² |
| Control type | mechanical |
| Number of power levels | 2 |
| Housing material | metal |
| Electrical protection class | IP20 |
| Weight | 3.6 kg |
| Dimensions (W×H×D) | 655×505×120 mm |
| Network cable length | 1.5 m |
* Contrary to popular belief, this is not the time limit after which the device will necessarily break down. However, after this period, the manufacturer ceases to bear any responsibility for its performance and has the right to refuse to repair it, even for a fee.
Equipment
The heater comes in a voluminous cardboard box, decorated in bright colors — red and burgundy shades are used. On the front side we see a photograph of the device, as well as its main features and technical characteristics.
The convector is protected from impacts using foam inserts. Additional accessories (including fastenings) are placed in a plastic bag.
Having opened the box, we found inside:
- the heater itself
- legs
- wall mounting kit
- product passport with warranty card
At first sight
This heater is designed to maintain heat in apartments, country houses and offices. Its operation is based on natural air circulation, and it does not have built-in fans or other mechanisms. The recommended heating area is up to 20 square meters, and the declared power is 1500 W.
In general, this is a standard convector that does not stand out either in its appearance or special functions. However, let's take a closer look and identify the main features of this device.
The convector has a body made entirely of stainless steel, with the exception of plastic elements such as the control panel unit and legs.
The front panel of the device has a logo in the lower right corner. On the left there is a warning about the prohibition of covering the heater. At the top there is a grille for air outlet.
On the back side we also see a painted metal sheet. At the top there are many small holes for air outlet. In the center is where it is mounted on the wall. At the bottom, a heating element located inside is attached through special slots.
It's time to talk about fastenings.
The plastic legs are installed in the holes provided for them and secured with two screws each.
By the way, here we can see slots for taking in cold air from the bottom of the heater, and through them there is a stitch-type heating element, which is a metal thread laid in a zigzag.
Wall mounting is provided using special “ears”-brackets. The convector, therefore, can be easily mounted on the wall or removed if such a need arises (for example, if it’s time to wipe it from dust).
In the kit we will find self-tapping screws and plastic dowels, so you won’t have to run to the store to get fasteners to hang the heater on the wall. All you need is a Phillips screwdriver (to install the legs) and a hammer drill or drill (to drill the wall).
On the left side we see nothing worthy of attention.
On the right is a plastic cover with a control panel — two mechanical knobs and an LED indicator. Below them is the power cord outlet. At the bottom there is a sticker with technical information.
Instructions
The device passport (also known as the user manual) is a compact brochure printed on high-quality glossy paper. On nineteen pages we will find comprehensive information about the device, rules for its use, installation, safety precautions, etc.
Thanks to the presence of a table of contents, you can immediately go to the desired section. The description of all actions and manipulations is accompanied by simple and understandable illustrations. In general, using the instructions was easy and pleasant.
On the last pages we will find a warranty card and a list of addresses of service centers.
Control
The device has two operating modes (two power levels):
- minimum heating — 750 W
- maximum heating — 1500 W
The modes are adjusted using the lower rotary switch, where the “0” position corresponds to the off state of the device.
On top there is a thermostat control that allows you to set the desired temperature. When this heat level is reached, the heater turns off automatically (and turns on again when the air temperature drops below the set level).
The heating status is indicated by a red LED indicator: a lit indicator indicates the heating process, and its absence indicates that the device is turned off or the heating has paused after reaching the desired temperature.
The device functions simply, logically and predictably. The only thing missing is an operation indicator, which can cause confusion: a device that is turned off looks the same as one that is turned on but waiting to be turned back on. In this case, there is a risk of forgetting to turn off the heater before leaving home.
The operation of the thermostat is accompanied by a characteristic soft click, which makes it easier to set the desired temperature even by ear, despite the absence of numerical values on the regulator.
Exploitation
Before first use, you must remove the device from the packaging and remove all packaging protection. Then you should wipe the case with a damp cloth, and then with a dry cloth.
When installing a convector on the floor or on a wall, it is important to leave a free space of at least 10 centimeters on the sides and under the device, as well as at least 15 centimeters above it. The absence of obstacles in front of the front panel within a radius of up to 50 cm is necessary to ensure normal air circulation and compliance with fire safety.
The electrical outlet to which the convector will be connected must support a rated current of at least 10 A. This means that the wiring must have a core cross-section of at least 3x1.5 mm² for copper materials.
During use, it was found that the device fully meets expectations. Like any other convector, our heater reaches operating temperature very quickly, in a few minutes, while the body of the device does not heat up too much.
Care
According to the instructions, it is important to periodically clean the device from dust and dirt. Before starting the cleaning process, you must turn off the device and allow it to cool completely. Then the convector body can be wiped first with a damp and then with a dry cloth.
You can use a vacuum cleaner to remove dust from the internal parts of the device and grilles.
Our measurements
Note that the maximum energy consumption recorded by us may differ slightly from the declared one due to the fact that in fact many domestic users still have 220 V in their socket (according to the USSR standard), and the official standard for the Russian Federation is a network voltage of 230 V. Thus The declared and measured power of devices may differ slightly from the rated power.
In standby mode, the consumption of the switched on device turned out to be zero. In the first and second modes, consumption was up to 720 and 1385 W, respectively. Our wattmeter showed that the actual voltage in the network at that moment was equal to 215 V. The minimum values were 630 and 1280 for the first and second modes, respectively.
The device operates silently, with the exception of soft clicks when the thermostat is activated.
As for the case temperature, it varies depending on the measurement point. In practice, it looks like this (let's imagine that we are looking at the heater from the front, and each cell corresponds to a point on the front panel of the device).
| 44°C | 71°C | 43°C |
| 42°C | 74°C | 41°C |
| 39°C | 37°C | 37°C |
The maximum temperature was predictably recorded at the point where the hot air escaped — up to 115 °C.
| Power mode | Energy consumption for 1 hour, kWh |
|---|---|
| 0 | 0 |
| 1 | 1.34 |
| 2 | 0.68 |
Practice tests
Due to the lack of cold weather, we had to start with a relatively high initial room temperature of 6 °C. Initially, the test was carried out with the convector set to maximum power in the coldest part of the room, on a windowsill turned inward. After the window was closed, we began taking temperature measurements every half hour. The test results were as follows:
| Time | t° near the heater | t° at a remote point |
|---|---|---|
| 0:00 | 6 °C | 7 °C |
| 0:30 | 9°C | 11°C |
| 1:00 | 14 °C | 15 °C |
| 1:30 | 15 °C | 16 °C |
| 2:00 | 17 °C | 17 °C |
| 2:30 | 19 °C | 19 °C |
During the first hour, the air warmed up to almost the same temperature throughout the room, after which the heating proceeded smoothly — 1-2 °C every half hour. The difference at different points in the room was no more than one (occasionally two) degrees.
Let us note that our measurements do not aim to conduct a full-fledged physical experiment and measure with maximum accuracy how much the device is capable of heating a room. As usual, we would like to remind you that miracles do not happen. In relation to household heaters (with the exception of heat pumps), this means that as much electricity was spent, exactly as much heat was released into the environment. In practice, this means that when using devices with the same power, only the uniformity of heating and the temperature difference at different points in the room can vary.
Conclusions
After thorough testing, the Resanta OK-1500SN heater demonstrated its complete predictability, providing us with neither pleasant nor negative surprises.
The device operates stably, providing relatively uniform heating of the air in the room (taking into account the characteristics of a heater not equipped with a fan). Energy consumption was as stated, taking into account small voltage fluctuations in the electrical network.
Positive sides:
- Two operating modes.
- Temperature maintenance function.
- Possibility of wall mounting.
Negative sides:
- Lack of power-on indication.