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TJ, So you are saying that in fact an electric motor is MORE efficient than an electric heater, because you get the same heat output AS WELL as the benefit of the motor having performed work...well

Marty, you’re confusing instantaneous energy vs energy over time. If you turned your 1500w electric heater on for the same amount of time as a cut on the table saw – 5 seconds or so - you would be

If all you are considering is the heat output of the machine and not the financial costs of wear and tear on motors, belts, bearings, etc., then yes, an electric power tool is just as efficient at

I agree with Brian. To take more of a devils advocate position on this topic. If all the energy was being converted to heat then we could substitute our saws for heaters. Any of you who live in cold

I was going to suggest to rerun the board after planning without changing table height. It should eliminate resistance from cutter or concern of cutting height. Imran

I agree with Brian, start with cleaning and waxing the table. That should improve your problem, but may not completely correct it. Then make sure your knives/cutters are sharp. They can also

Maybe, but foolish is relative.? My point is that it might be worth quantifying, since everything is a tradeoff. For exampling, using my previous estimate of costing $2.50/hr to make up for lost DC

TJ and others, My simple mind may have missed the point of these theories, but are you telling me that it is as efficient(financially) to heat my workshop with a running machine as it is with an

Brian, an LED light bulb might be more “efficient” in the sense that you may get the same number of lumens as a 100W tungsten bulb with only a 15w LED bulb, but that’s a different problem. The

Lumens is "work" only as metaphor, and by the same token, heating is also "work".? ?The "work" a heat lamp does is heating for example. Ask yourself this: where did the light "work" go after the

As I noted, may not make sense for you.? Obviously I'm not assessing your specific application, just noting that assessment is more complex than cfm x outside air temp.? For example, there is no

Agreed, the horse has heat, but in the case of lighting, the lumens is the “work”, we get the same amount of lumens from 15 watts (LED) as we do 100W of incandescent. Put the 100W vs. the 15W in

I am an electrical engineer who is 12 credits short of a second degree in mechanical engineering.? TJ is correct in that any energy coming into the room either turns into potential energy or it is

Brian, put your hand on a horse that's just standing around doing nothing, and then put your hand on a horse that's been working.? ?You'll feel the heat. Part of what's confusing is the timeframe of

That assumes I have a large enough heat pump for the additional load.? I do not.

Brett, I found the fossil fuel reserves equally fascinating. I could never comprehend that much organic matter could exist in one place. That is until I learned on a Nova show that bacteria that we

The law of conservation of energy says energy can’t be destroyed, or created, only have its form changed. The actual kw usage, the “draw” you actually pay for - that energy comes into the shop

I’m not sure I agree, show me the heat involved in this: I agree that there is heat created by electrical input, but I don’t think all the electricity consumed is dedicated to heat. For example,

Was there a reference earlier to using a loading dock light arm to suspend the vac hose and power cord?? Perhaps none were long enough and or could not support the load of the hose?? There is one at

Electric motors (like pumps) only draw the energy from the power source according to the amount of WORK being done. A motor idling will only draw the energy from the source through mechanical losses