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What is a washing rack pulley used for?
The rack is used to hang laundry indoors. The pulley system is used to lift the rack to a higher elevation in the room where usually the warmer air is located.
How is the transfer of thermal energy from electric devices regulated?
A device that converts electric energy into thermal energy. A device that regulates the temperature of a system. A device that uses electric energy to transfer thermal energy from a cooler location to a warmer location. A machine that converts thermal energy into mechanical energy.
How do you check for missing insulation in walls?
Hi, You can use a infrared imager and view through it to see where your walls are warmer and also you can use a lazer digital temperature meter to do much the same.This will show you the uneven heat loss through uninsulated walls and insulated walls so you'll pretty much know where you stand. Hope this helps: Jimiwane
What is the difference between a single pole breaker and a double pole breaker?
Courtesy of Ace Hardware - I found it on their site · What is the difference between a double pole and a single pole thermostat?Single pole thermostats breaks only one side of the power line to your heater and cannot be turned off. Therefore, power is continuous to the heater even if it is not running. The control knob will have a low temperature setting without an off position. Single pole Thermostats uses only two wires. This means that even if the temperature dial is turned all the way down, voltage is still going into the heater through one line. This may pose a hazard to anyone who might perform electrical work on the heater without realizing that the circuit was still on. You will need to turn off the power at the circuit breaker before electrical repairs can be made safely.Double pole thermostats breaks both sides of the power line; therefore all power to the heater is interrupted. This acts as a safeguard for people performing electrical work on the heater. However, to be on the safe side, you should always turn off the power at the circuit breaker, not at the thermostat, before making any electrical repairs. A double pole will uses four wires and has a off position on the thermostat.Since they are inherently safer, you should always try to use double-pole thermostats, if possible. Another advantage of a double-pole thermostat is that you can turn it completely off and the heat will not come on no matter how cold your room gets. But with a single-pole unit, the thermostat will turn the heat on even if set on the lowest setting.CHECK YOUR LOCAL CODES FOR BUILDING REQUIREMENTS IN DETERMINING IF YOU NEED A SINGLE OR DOUBLE POLE THERMOSTAT BEFORE PURCHASING OR INSTALLING. How can I determine if I have a single or double pole thermostat?Usually, you can tell the difference between a single pole and double-pole thermostat by looking at the dial. A double-pole normally has an "Off" position on the dial whereas a single-pole thermostat does not. The only sure way to tell which kind you have is to remove it from the wall and count the wires connected to it. A double-pole thermostat will have four wires that switches both hot wires whereas a single-pole thermostat will have two wires that only switches one of the hot wires. Can I use a single or double pole thermostat with a 120, 208, or 240 volt heater?Yes. Can I use 1 thermostat to control more than 1 baseboard heater?Built-in thermostats (mounted directly on baseboard) are designed for single heater use. However, it is possible to control more than 1 heater on a wall thermostat if the thermostat rating is not exceeded. Can I mount the thermostat on one side and wire the baseboard heater on the opposite side?No, the thermostat requires power from the supply wires and must be wired in conjunction with the baseboard heater. Is a built-in or a wall mount thermostat better?A built-in control is convenient when the walls are already finished. The built-in thermostat is also convenient to install. However, the wall thermostat is a more accurate way to control the room temperature, is more convenient to use, and has a broader selection of models. The use of electronic thermostats provides more accuracy and saves you money on your electric bill. Can all of the heaters in my house be controlled by one thermostat?There are many benefits to zonal heating. Zonal systems save energy by not heating unoccupied rooms and provide the ultimate in comfort by allowing occupied zones to be heated specifically to individual needs. The purpose of each zone's (room) heater is to heat that specific zone per the set point of the individual thermostat. What is the difference between a low voltage and a line voltage thermostat?Low voltage thermostats should be used when the heater load is greater than 3,800 watts such as commercial heater or central forced air systems.Line voltage thermostats should be used for zonal heat systems such as electric fan heaters, baseboard heaters and radiant heaters. What should I do if my wall thermostat feels hot to the touch?Cadet recommends you replace the thermostat. A hot thermostat indicates that it is not working efficiently; decreasing its accuracy. NOTE: A normal operating thermostat will be slightly warmer than the room temperature by 3 to 5 degrees. Can I use a wall mount thermostat to control my heater if it has an in-built thermostat?Yes, to bypass the in-built thermostat, turn the thermostat on the heater to the highest setting, then use the wall thermostat to regulate the room temperature.
How does an occupancy sensor work?
The general answer is that occupancy sensors work by detecting human presence or activity. The specific answer is that occupancy sensors use one or more of three different technologies to detect or "sense" human presence and/or activity. The most common technology is passive infrared (PIR). A PIR sensor works by sending out invisible infrared beams that read or respond to temperature differences. If there is no one in the range of the sensor the sensor does not respond. When a warmer object, such as a human body, crosses two or more beams the sensor responds to the difference in temperature between the person and the background. This is the tecnology used in basic security sensors. In the case of a basic security sensor, there will be typically 4 - 10 beams which means each beam is fairly wide. This is why you can sometimes walk directly towards a security sensor and nothing happens. It is because you are moving within one beam and not crossing two beams. Only when you cross at least two beams will the sensor activate. In modern PIR occupancy sensors there can be over 1400 individual beams which makes them much more responsive to small movements such as sitting at a desk and typing on a keyboard. PIR works very well in most commercial environments and can detect at a long range, up to 40 meters, in warehouses and underground car parks. PIR has several limitations, however; it requires line of sight and will not read through any material including glass. In addition, PIR does not work well in extremely warm envorinments as it cannot distinguish between the temperature of the human body and the background. The second common technology is microphonics. As the name implies, occupancy sensors that incorporate microphonics work by picking up noise that is typical of human occupancy or activity. Advanced microphonics sensors incorporate Automatic Gain Control (AGC) and can "learn" background noises such as the steady hum of a central air conditioner or the sound of a circulating fan. They are also sensitive enough to pick up sounds typical of human activity such as typing on a keyboard, talking on the phone, a phone ringing, tapping on a desk, a chair squeaking, walking on a wood floor and numerous other sounds that are typically generated by human presence or activity. Microphonics type sensors do not require line of sight and can hear around corners. This type of sensor works very well in large open plan office and commercial areas as they can cover a large area without having to "see" all of it. The limitation of microphonics sensors is that they do not work in very noisy envorinments such as a factory or where a recurring noise not necessarily related to human activity such as a TV that stays on in the background or an individual, window type air conditioner that comes on and off whether there is a person in the room or not. The third common tecnnology is high frequency (HF) ultrasound or ultrasonics sensors. HF works exactly the same as a bat's "radar" or a submarine's "sonar." The sensor sends out a high frequency sound wave that bounces around the space and returns to the sensor. Any movement that disturbs the wave activates the sensor. HF sensors can be very sensitive and can read through many materials including the most commonly used interior construction materials and glass. From a human occupancy standpoint, HF's big limitation is that it responds to any motion, not just human presence. For example, an open window and rustling curtains or a moving window shade or, in an office environment a piece of paper coming out of a printer, can activate an HF sensor even if no one is there. To enhance the strengths and minimize the limitations of each of the three technologies, sensor manufacturers sometimes combine technoligies in "dual technology" sensors that typically include a combinaton of PIR and either microphonics or HF. The most imortant issue for a successful occupancy sensor installation is to understand the strengths and limitations of each type of sensor and to choose the appropriate sensor for th application. Occupancy sensors can save significant amounts of energy and take the human factor out of remembering to turn off the lights, the air conditioner and any other equipment that only needs to be on when there is human presence.
Is cold water a better conductor than hot?
No, hot water is a better conductor of electricity than cold water. This is because warmer water molecules have more kinetic energy, allowing for better electron movement and increased conductivity.
Do water fleas reproduce better in warmer or colder temperatures?
colder because when they get hot they burn
Why does the metal spoon feel colder than a wooden spoon?
Metal is a better conductor of heat than wood, so when you touch a metal spoon it can transfer heat away from your hand more efficiently, making it feel colder. Meanwhile, wood is a poorer conductor, so it doesn't draw heat away from your hand as effectively, resulting in a warmer sensation when you touch it.
What is the opposite of colder?
The opposite of colder is warmer.
If air would be a better heat conductor would the earth be colder or warmer during the night and why?
If air was to retain the heat from the sun during saylight hours then the earth would stay warmer for longer, however air is constantly moving so we get air from different parts of the world. so if it is cold near to the UK while they have sunlight and we have night time then we are more likely to be cold so even if air was a better heat conductor we would not be warmer during the night.
Is -11 degrees warmer or colder?
i think its colder but i dont know am i right?
If a cold front passes over you does it get warmer or colder?
colder
Do starfish prefer warmer or colder waters?
Starfish prefer warmer waters rather than colder waters.
Why does a vinyl tile floor feel colder than a rug even though they are of the same temperature?
Vinyl is a better conductor of heat than a rug, so it conducts heat away from your body faster, making it feel colder to the touch. Rugs have more insulation properties that help retain heat, which is why they feel warmer.
Is the Arctic circle colder or warmer than Antarctica?
Warmer
When you pick up a spoon your body heat will warm up the part of the spoon you are touching why does the metal spoon feel colder than the wooden one?
Metal is a better conductor of heat than wood, so it draws heat away from your hand quicker, making it feel colder. Wood is a poor conductor of heat, so it doesn't draw heat away as quickly, resulting in a warmer sensation when touched.
Was the weather warmer or colder in iceland 2000 years ago?
colder
