Ladder Heater Connection Issue: Improper Install, 1st Floor Apartment, 10-40% Less Efficiency

Question

Gentlemen, I looked through some similar topics and found no definite answer.
"Professionals" in my absence connected the heater as shown in the picture, it is not very possible to change it.
The apartment is on the 1st floor, 4-storey block of large panels.
I read that the heater connected in this way will be 10-40% less.
How does it look real with this heating, try to connect it crosswise or from the bottom or leave it because there will be no big difference?

Zbigniew Rusek · Answer

This connection is still better than connecting completely from the bottom (both supply and return). The best (providing the greatest thermal efficiency) is the cross-connection. If you have to persistently change something, try to make cross connections (it is always possible somehow - maybe you need to screw in some fittings and short sections of pipes).

piracik · Answer

I do not understand what is wrong with this connection from the bottom?

andrzej lukaszewicz · Answer

... which is used 99% of the time ?? I'd like to know too.

sanfran · Answer

For me, all radiators are connected from the bottom because they are British islands. On the other hand, my colleague @zbi_gniew Rusek is a bit right, because according to the measurements, connecting the radiator from the bottom is 90% of heat consumption when it is connected crosswise. Which doesn't have much impact on your bills anyway. And as for the ladder in the photo - don't worry, the radiator will also warm well.

andrzej lukaszewicz · Answer

Cross connection has an advantage only on large radiators, there is no difference on ordinary small ones.

krzsboj · Answer

This is true, unless it is connected to the candlestick riser. best regards

Jardel · Answer

What does the candle plummet change?

hajs444 · Answer

The author of the topic probably has no allocators on the bathroom riser, so he wants to use this radiator as much as possible. I hope this radiator has been properly calculated for this riser.
Overall, cross-connect will be most effective in this case, but only a few percent. In a room as small as a bathroom, you won't feel the difference.

mikaxx · Answer

Can anyone tell me where to install the heater in a cross-connected radiator? does it have to be on the return or can it be in the lower left corner?

Zbigniew Rusek · Answer

Rather not on the return, but in the opposite lower corner to the return (if the supply is from the top), because installed on the return, it may deteriorate the flow of the heating medium and then the radiator may not heat at all when supplied from the central heating installation, when the heater is turned off. Added after 1 [minutes]: First of all, the circulation of the heating medium through the radiator deteriorates (as if the pump could handle it, with gravity it would not work at 100%). Secondly, such a connection (both supply and return at the bottom) will cause the heater to air out forever.

hajs444 · Answer

If you have a return on the right side, you install it in the lower left corner. No exaggeration ..... I assemble a lot myself with bottom connection because the customer just likes such a radiator. In forced circulation it does not matter much. The heat rises anyway, so it will be warm all over the place. As for the air in it, unfortunately you have to get used to the fact that such a heater needs to be vented twice a year. Its design alone makes it act as an air separator. After that, there are also automatic vents.

Ladder Heater Connection Issue: Improper Install, 1st Floor Apartment, 10-40% Less Efficiency

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