EdenPURE Heaters
19 years ago
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- 19 years agolast modified: 11 years ago
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EdenPure Gen3 pros and cons anyone?
Comments (34)Cayveman, I finally checked back on this thread. It's about thermodynamics and the conservation of energy, so in easy to understand terms when you have energy input (like the voltage and amps going to the heater) and what comes out has to be the same because the energy can't magically increase or be destroyed. It's simpler with electric resistance heaters because inefficiencies that we normally see in motors, pumps, etc. manifest themselves as heat which in this case we want. So the energy (kwh) can be directly converted to Btu's (Btu = Btu/hr average x number of hrs on). The reason I say Btu/hr average is that the heaters thermostat turns the heating element on and off. As for the heat lamp vs a std lamp, if they both draw 100 watts of power, they have the same heat output in Btus to a space. The std lamp would have a higher lumens (measurement of light) per watt but even the light after being absorbed and reflected by surfaces converts to heat. So there is ultimately no difference in the heat added to a room. Other items in your home such as TV's, dishwashers, etc. are not 100% efficient at doing the intended task, but all the input power in them as well converts into heat. So a dishwasher or refrigerator running helps heat your house as well as a portable heater in the winter but adds to the air conditioning load in the summer. Calculating the heat output is easy because all of the inefficiency of the motors and circuits in your appliances result in heat. That is not the case with your electric water heater because much of the heat is dumped down the drain with your bathwater and only a part of the heat stays in your home. Lastly concerning heating of air or water, the equation is the same for sensible heating or cooling (w/o removing moisture like an Air Cond. in the summer). What I think everyone is interested in is heating the space so a thermostat will show a higher temperature in the room. There is radiant heating used in non heated spaces where people have to stand in a line of site of the heater to feel the heat but that is like standing in front of a fireplace to keep warm. The equation for heating air or water is: Btu = mass x heat capacity x Temperature difference The difference is that water has a spec. wt. of about 62.4 pounds per cubic ft (Varies with temperature and can be found on the web.) Air is only about 0.075 pounds per cubic foot. (Varies with temperature and can be found on the web.) Also the heat capacity of water is 1.0 Btu/pound - deg F while that for air is 0.24 Btu/pound - deg F. Example: Small bathroom 5 ft x 9 ft with 8 ft ceilings at 40 degrees F. We want to heat to 80 deg F using a portable electric heater having an input of 1500 watts ( 5,119.5 Btu/hr input = output). Volume = 6 x 9 x 8 = 432 cubic ft Mass = 432 cubic ft x 0.075 pounds/cubic ft = 32.4 pounds Specific Heat of air = .24 Btu required = 32.4 pounds x 0.24 Btu/pound - deg F x (80 - 40) deg F = 311 Btu kWh= 311 Btu x 1 kWh / 3413 Btu = 0.091 kwh Time required to heat the room = 311 Btu x 1 hr / 5119.5 Btu = 0.0608 hr = 3.64 minutes You would actually take more than 3.64 minutes because you would be heating all the fixtures, walls, and if not insulated well other adjacent rooms. I asked my mailman if I could borrow one of his edenpure heaters for a test just to compare what Im describing above, the heating of a small bathroom with two types of heaters just for fun. I have the equipment to measure input energy and the air temperatures would have to be measured in several areas in the room every 30 seconds or so and recorded. There wont be a difference because its impossible but it might be interesting to post the test results. Could be done in the summer but you would have to heat the room to 100 deg F to get good results and preferably before the sun comes up (to eliminate another factor) and at about the same outdoor air temperature. What goes in has to be what comes out. It cant disappear or get larger. Not talking about heat pumps or air conditioners right now as that is a more complex subject and those units have COPs and EERs associated with them where the heat addition to a space is higher than the compressor energy used. They still dont violate the laws of thermodynamics about the creation or destruction of energy. Again this isnt saying everything is 100% efficient. Its just electrical appliances, heaters which wont have 100% efficient motors but the inefficiencies manifest themselves as heat. I used to sell pumps as a sales engineer and our pump curves would show the pump efficiencies which would vary depending on rpm, flow rate, and pressure. What this meant was that the motor and pump when combined might only be 75% efficient and was determined by tests performed by the pump and motor manufacturers that were shown on graphs that engineers used. The efficiency the manufacturer stated was based on the actual power required to pump a given flow and pressure compared to the theoretical power required (based on another engineering formula). All the electric power (watts) into the motor ends up as heat while moving the water. Pumping the water even heats it up slightly. Hope this clarifies things and I havent been too long winded. Even if its stored by being absorbed by a piece of copper it eventually is released into the air. It has to be the same as what's input. The same is true of a 100 watt light bulb no matter what type it is, although a heat lamp having larger diameter wire inside its bulb outputs a smaller percentage of light and more heat...See More10 100 watt bulb verses 1000 watt heater?
Comments (12)There are a lot of confusing questions... let me try to clarify some things: 1. All energy becomes heat. All of it. So, the electrical energy going into a light, a fan, a stereo, etc. all becomes heat. Any electrical device is 100% efficient (close enough) at producing heat. As the previous post said, a device that has a flue will not be 100% efficient at producing heat that goes in your house... because some of it goes out the flue. 2. The electrical energy that is actually consumed by an electrical device, measured in watt hours, is the amount of heat it produces. period. The only exception to this is a heat pump. So, a 1500 watt Edenpure heater produces exactly as much heat as a 1500 watt hair dryer or 1500 watt vacuum cleaner or 15 100 watt light bulbs. The EdenPure and Solar Comfort heaters have a higher coefficient of BS and are made of special wallet lightening materials... but other than that, they produce the same number of BTU's per watt hour of electricity as my Kitchen Aid mixer. 3. Believe it or not, visual light output isn't measured in Watts as we commonly think of it (it is a measure of radiant flux). We use the amount of light an incandescent bulb produces as a common reference point, but it's a really poor reference. So, for example, we say that a 26 watt florescent bulb produces the same light output as a 100 watt bulb... but the amount of light a 100 watt incandescent bulb produces varies a great deal. One of the factors is the voltage applied to the bulb and the voltage at which the wattage rating was given. On the other hand, a 26 watt fluorescent bulb produces 26 watt hours of heat while a 100 watt bulb produces 100 watt hours of heat. If it's light that you are after and not heat, you want the thing that produces the most light for the least amount of electricity. A kilowatt hour (1000 watts for an hour) is equal to 3413 btu's. BTW: large office buildings often don't need heat in the core of the building because of all the heat from the lights, computers, etc. The actual measurement of light is very complicated - there are parts of the light spectrum that we can't see (infrared and ultraviolet, for example) The common measure you will likely see in comparing light output is lumens. That is a more apples-to-apples measure of light output for average people if you don't use the inexact "incandescent equivalent". Given that information, can I help you narrow down your questions a little?...See MoreAmish heaters
Comments (29)My mother in law bought one and I looked at it when I was there in her townhome. Her TH is built on a slab with an older Lennox furnce (downflow) and her living room (farthest from the furnace) is always cold. Plus she has a patio door in the living room and outside door near the combined DR/entry/kitchen. Being older we feel the cold more? I liked the style of the cabinet and it went well with her nice furnishings. (An oiled filled white electric radiator on wheels would not). The dancing flames were attractive and the fan forced heat coming out seemed to warm that colder portion of her home nicely. Now, she can keep the tstat down lower or wheel the thing into her bedroom if she will spend time there. Whatever the cost, I think it was a wise investment for her....See MoreHas anyone tried one of the new infrared heaters?
Comments (17)Chemocurl posted: "That is amazing that you could keep a room of that size with large windows and 3 outside walls that warm with just one 1500W heater!" No that is NOT amazing. Just about ALL space heaters sold at the stores use 1500W of power, and any of them will certainly heat a room. Those that use less produce less heat of course. Those that use more produce more. It is physics. Do realize that running a 1500W appliance continuously is sucking a lot of energy. "The site here explains the three major types of heat." That site does not explain anything. It is ADVERTISING. It uses a lot of fluff words like amazing, superb, excellent, and the like. Then it goes on to carefully select words that sound like solid scientific data arranged to make this heater they sell sound like it is something new and different. Everything the ad says is carefully arranged and worded to be misleading when you read it. For instance they say that the unit "only" draws 1500W of power and reminds the reader that a 'simple coffee maker' uses 1500W of power, which is true, but you don't keep your coffee maker running 24 hours a day either, do you? A coffee maker only draws 1500W for about one or two minutes and then reduces power consumption to about 300W to keep the warmer on (if it has one - some don't), and even that is shut off after the coffee is gone. The write the ad to try to convince the reader that there is some brand new scientific hocus-pocus that they invented that they exclusively sell. What they are selling is a space heater that is no different than other ones you can pick up at the store for about $30. As, I said before, a space heater does have it's advantages in some situations like for zone heating. You can set your furnace thermostat for your house at say 40° or 50° so that your pipes don't freeze and your wallpaper does not peel off, and use the space heater in a room that you are using with the door closed to keep yourself comfortable. Using a space heater instead of baseboard heaters that are already installed in their home, like your neighbors do, is NOT going to save energy. You can't cheat physics. Alisande posted: "But they wanted me to pay $250 a month on the budget plan. I got them down to $188, but that still sounds outrageous to me." ☛☛☛I hope you realize what a budget plan means. If they calculated your average to be $250/mo and you are now paying $188/mo you will have a HUGE balloon payment at the end of your cycle. I hope you have the lump sum money set aside to pay it when you get your bill. Unless you have done something to reduce your usage from the last two years, (which is what they calculate the figure from), like get new windows or adding insulation, and know that your usage will be less, OR know that the price/rate of fuel has gone down in your area, (not likely), and the new figure is closer to what you will owe, you could be in a financial predicament at the end of the billing cycle. All a budget plan does is spread your payments over a period of time so that your bill does not fluctuate wildly, and you know what your monthly payments will be, ie; no 'surprises'. ☛☛☛ It is not a "discount" nor does it produce any "savings". You pay for what you use. Period....See More- 19 years agolast modified: 11 years ago
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