Improved radiator central heating

[PITMIX]

Exact no need for formwork the fact of forcing the convective movement is enough.

The boiler cut this morning at 19,5 ° C room temperature for 22,5 ° C to the ceiling at the other end of the room without any radiators to less than 3m.

I put the fan on top of the radiator.
Avant


After

[chatelot16]

your radiator is already well closed of origin ... it is more a convector than a radiator ...

as it is well closed vacuum below or blow on it will be equivalent

Another advantage of this inverted blower: it does not suck dust from the ground ... it does not blacken the wall above the radiator

[PITMIX]

I can even confirm that it is much more efficient by blowing down. The air temperature at the radiator outlet is 32 ° C instead of 24,5 ° C when the air circulated in the other direction.
The ceiling air at the other end of the room is 20 ° C instead of 22,5 ° C when the boiler is shut off for an ambient temperature of 19,5 ° C.
The delta T ° water inlet / outlet radiator fell to 16 ° C.

The temperature is much more homogeneous and I can let the fan run constantly.

[chatelot16]

do not confuse efficiency: if the air comes out at 32 ° C instead of 24 ° C it is rather a sign of a lower airflow ... and it should cause a lower power of the radiator: normal, fan blowing upward it is helped by convection ... fan blowing down it is upset by convection

if it improves the temperature homogeneity of the whole room, this advantage is superior

if the flow rate of this blast opposed to the convection would be too low it will be enough to find a more powerful fan

how much does it cost ?

[Christophe]

chatelot, I think it's more of a story about improving heat exchange.

In addition for thermal comfort, blowing hot down is much better! It is confirmed.

We will see with the delta of the water when pitmix will have measured ...

I can even confirm that it is much more efficient by blowing down.

Ah well, it looks like I had just seen

ps: for dust it is kif kif in my opinion; on the other hand there will be less big dust stagnant in the radiator.

It's a 20-30 fan, I think ...

[PITMIX]

Yes the price is 39 € with IR remote control.

The air temperature is higher radiator output not because the air flow is lower but simply because it takes air from the ceiling (warmer) to pass through the radiator.

The efficiency of the hot battery is reduced because the air goes against the direction of the convective movement.

I tried in 3 speed the air coming out of the radiator is slightly lower from 0,5 ° C to 1 ° C approximately.

This arrangement suits me completely.
My boiler has switched off from 9h36 to 10h10 with the blower up. It has switched from 10h10 to 11h05.
By arranging the fan on the top blowing down it turns 12h20 to 12h40 to restart only 13h50.
I do not have enough back to draw a conclusion but it looks good!

[Christophe]

Ah, you have the Luxe model then

I do not understand when you say you take the air from the ceiling? Do you have a sheath for suction?

[PITMIX]

No no cladding I would need smoke and a small video to show the mixing of the air.

Naturally the warm air rises and the cold air descends.

By forcing the movement of air from the top to the bottom, I concluded that air is being circulated from the ceiling to the ground.

My temperature recording sensor is above the kitchen cupboard at 2,20m high and it reacts immediately when I switch on the fan which is yet at 6,90m from the sensor.

[Christophe]

Ok I see what you mean!

So which suite? Are you going to leave the fan on top and equip your other radiators?

Can you measure the water radiator delta?

[PITMIX]

For now I leave like that I already reduced the instruction of the thermostat to 19 ° C and I measure 19,5 ° C on the table of the kitchen where there is no radiator.
My boiler is running 20min again.
I have already measured the Delta T ° it is from 16 to 17 ° C.
It is weaker but I think it is explained by the presence of my sofa just next to the radiator. The warm air blowing down is partly recycled by the fan and the DT ° of air must be low. It also explains the higher temperature blowing.