@lukesgoldies: If you’re using the same exact heating element, then yes it’s absolutely more efficient to heat the water directly, then to heat the air and then have that warm air and then heat the water. However, resistance electrical heating is the most expensive form of heating, my solar panels could not keep up and my battery will drain in hours. Burning diesel is far cheaper than resistance electrical heating #heating #diesel #electric #fish #greenhouse
If you use warm water you won't need heaters. Hope this helps 👍
2025-10-16 04:12:18
362
DiaraDal :
Electric resistance heater are not inefficient they are pretty close to 100% efficient (if you account for the heat generated by the cable it's actually 100%). The price of electricity is higher per kwh compared to diesel - that's the crazy thing
2025-10-16 05:57:10
147
bristolshubunkins :
Heat the concrete and it stays warm for hours
2025-10-16 12:16:10
0
email2jacky :
how abt using diesel to generate electricity enough to heat the 20 pieces of heater?
2025-10-16 04:44:17
2
Dwain :
So Dusel is to cheap
2025-10-16 07:32:02
1
Water Stone Gardens :
Get a wood boiler
2025-10-17 01:16:30
0
Nico :
Run red diesel
2025-10-16 01:46:16
96
Maxeroni :
Heat pumps my guy
2025-10-16 14:08:51
0
KrypticcKraken :
Im no expert but I also feel like the air makes a better buffer between the thermal battery that is the water and the air outside, and keeping that buffer at a consistent temp helps the energy from leeching from the water as fast
2025-10-28 10:50:06
0
ronnyjoos :
you need a diesel water heater , consumes only 1 gallon / 2h and is 10kw
2025-10-16 05:28:33
1
yakuzafan69 :
install a heat pump, steep investment but it will be way cheaper to run
2025-10-16 12:13:03
0
Virus detected :
Pump your water through black plastic pipe on the ground or in a rack. Let the sun heat it
2025-10-16 01:36:13
9
x24 :
get you a small car radiator to blow the diesel heater through and use a small electric water pump to make a better transfer of heat! idk if it would make it that much more efficient but would be an interesting project anyway!
2025-10-16 18:55:14
1
John Baker :
why not spend like 90k on solar
2025-10-16 13:05:51
1
Gagnon's exotic n bioactive :
build a radiator to pump the water through then use that heater to push hot air through it and that may be more efficient
2025-10-16 15:56:02
2
sulaiman :
use solar water heater
2025-10-16 06:44:46
1
rollmeister :
That tiny electric heater would barely heat anything
2025-10-16 03:15:56
1
Alfonso Salinas :
Bitcoin mining rig for heat making, if you can make the investment
2025-10-16 20:57:13
0
Greenwood66 :
why dont you use a cheap mini split AC instead to heat the room? That will cut the electric bill by 75%.
I dont know what diesel and a kwh of electricity costs in your country, but here is 1.60 per liter and 0.25 per kwh. burning diesel at 100% efficiency would generate roughly 10kwh of heat. so 16c per kwh. a heatpump like a mini split pushes 4kwh of heat for every kwh consumed. so 6 cents per kwh.
2025-10-16 07:57:19
0
sonni987 :
Water absorbs extreme amonts of heat compared to air. It takes way way way more energy to heat water than air. Thats why you can boil water in a plastic bottle or bag over a campfire
2025-10-16 03:13:34
7
night feeder12 :
I think it would just burn the fish as well if they accidentally touch it
2025-10-16 16:06:41
0
Smp wood :
Have you ever considered installing and outdoor wood boiler and then running pipe under the ground to your green house? I’m not sure if the wood cost would be cheaper for you, but it save a ton on heat using my boiler! Downside is chopping and stacking wood sucks
2025-10-16 16:58:43
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Tyler :
look into Heat Pumps for pools. you can run a pool pump right into it.
2025-10-16 01:18:45
99
moremadnessthanmethod :
hook some solar panels hooked directly to some 24 or 36v water heater heating elements. obviously you will want a thermostat controlling a relay but you won't have the loss of converting to 120 then running heating elements
2025-10-18 00:30:26
0
☦ idk ☦ :
hello Luke its day 802 of asking for a fish named sushi pls
2025-10-16 12:08:31
0
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