VMC Df Akor HR from Unelvent

[Bullitt]

I installed a thermometer in the insufflation mouth furthest from the exchanger, it stayed there for a good 1/2 hour.

If you have only 1 degree of difference between the outside air, and that exited from the exchanger at the level of the air vents, it is that your installation has a problem.

The exchanger, for this type of VMC has an efficiency of 95%, and that's what I get, a difference of 20 ° between the 2 airs (outgoing and entering) for a t ° of 21 ° to l inside the house.

You should give us more information about your installation.

[gontiertophe]

Hello

I have an installation of a double AKOR HR flow in a garage with fresh air intake in the garage.

Insulated sleeves

I have a farmhouse of 25 meters.

I took a temperature measurement again today

This gives

Fresh air intake in the 5,3 degree garage

Suction temperature in the kitchen 19,4 degrees

Insufflation closest to double-flux 9,2 degrees

What do you think of these measures (gain of 4 degrees this is little) and what to do to improve the performance

Thank you for your advice

[Flytox]

With such a low yield, there must be a problem. You should at least follow all the accessible pipes to see if there is nothing disconnected, torn. See if the summer / winter valve is not in the wrong position (the one that allows the passage in the heat exchanger to be strapped for the summer).

[Bullitt]

Where is the interchange?

As I mentioned above, the 95% efficiency of the exchanger is only obtained if it is located in a technical room in the house, i.e. at the T ° e house, that is to say 19 ° 4 as far as you are concerned.

If your heat exchanger is located in your garage, at 5 ° C, the gain can only be 4 ° C.

If your exchanger is in a heated room, at 20 ° C, the insufflation temperature would be more than 18 ° C.

On my installation, I have the exchanger in a cupboard in the house, and the insulated ducts pass through the attic, with a minimum of 15 cm of cellulose wadding, then, in the attic, only the 2 ducts of 150mm in diameter pass for suction and discharge of stale air.

If your exchanger is in your garage, without insulation, it is normal for the gain to be 4 ° C.

[gontiertophe]

Hello

The temperature reading is done at speed 2 of the vmc Akor.

My vmc always runs on speed 2, your what speed?

Thank you

[jessle]

Hello

Little feedback on the savings made after the installation of a double flow vmc.

My vmc has been running for a year.
The vmc is in the attic and it is poorly insulated.
here are some facts:
flow 120mcube / h
0 ° outside
9 ° at the end of the mouth after 29m of driving
18 ° suction temperature
insulate pipe even be 100mm of glass wool

It is not a great return but!

electricity consumption for heating before vmc 13000kw / h average over 3 years
electricity consumption for heating 10500kw / h since the installation of the double flow vmc.

[Bullitt]

Not bad this return, you are at 50% of return aulieudes 95% possible.
It would be worth it to strengthen the insulation and improve the 50%.

In any case, this is encouraging.

Little question: how do you know the flow (the 120m3 of air)?

@gontiertophe: position "2" is on the remote control?

[jessle]

For 120mcube / h

It is not an AKOR HR dual flow vmc, it is an Atlantic
therefore the flow rates are different.

[I Citro]

Here is the quote that a professional offers me for a VMC HELIOS (a reference in double flow).
This estimate concerns the total supply off pose, therefore with 19,6% VAT.:|
There is one for as expensive a distribution network as an air handling unit ...

I would like to lower the bill because it gets a bit financially ...

However, it is absolutely excluded that I lower the quality of the components.

The strong point of this estimate concerns the "FRL" pipes which are semi-rigid, anti-static, cleanable without dismantling ...

The technicians at Helios consider that installing a VMC DF with flexible pipes is a heresy prohibiting cleaning and above all causing a significant decrease in performance and the need to replace the pipes after 5 years ...