I would not use a heater of less than 100 watts for anything. The price difference is minimal between 50 watts and 300 watts. Basically it is only the comparative physical size of the tank and the heater that decides how 'big' a heater should be. My usual surmise is "bigger is better" because it will not have to work as hard or as long as a smaller wattage one.
2.4705 watts/hour
Edenpure heaters produce 1500 watts. It is an electric heater, which uses quartz heating element to generate heat.
Usually about an hour.
Anywhere from 6- 35 hours. Lol. No it should take around 2 hours
Around 3 hours
130000 btu
To heat a 40,000-gallon pool by 30 degrees Fahrenheit, you'll need approximately 1,200 therms of gas. This estimation assumes that it takes about 1 therm to heat 1,000 gallons of water by 1 degree Fahrenheit. The efficiency of the heater can also affect the total gas consumption, but with a 400,000 BTU heater, it should achieve the desired temperature increase relatively efficiently.
To put it into perspective a 1000 watt base board heater will heat a 10' x 10' = 100 sq ft room.
I don't know what exactly you mean by a "heat mat", but your question is kind of backwards. You don't run an electrical device *with* watts. You run them to *produce* watts (watts of light, watts of heat, watts of sound, etc). I believe the thing you are really asking is how many amps are required to run your device. As an example, consider a "1500 Watt heater" that is made to be plugged into a typical wall outlet in your home. The voltage in the wall is 120V, and the heater will produce 1500 watts of heat when plugged into that 120V. To calculate the amps, you divide the watts by the voltage. 1500W / 120V = 12.5A
Since power = voltage * current we have current=power/voltage so 3500 watts/230 volts = about 15.218 amperes in a heater using a resistance to generate heat. This should be valid even though the "230 vac" indicates that it is an AC circuit and not a DC circuit.
Upgrading to an 80-gallon heat pump water heater for a residential property can provide benefits such as increased energy efficiency, lower operating costs, and a larger supply of hot water for household use.
Heating water in a 40-gallon electric water heater typically takes about 1 to 2 hours, depending on the heater's wattage and the initial temperature of the water. Most standard electric water heaters have a heating element of around 3,000 to 5,500 watts. The time can vary based on factors like insulation, the starting temperature of the water, and the efficiency of the heater.