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Forum: Solar Power

05-16-19, 04:05 PM

Replies: 22

Solar panel survey

Views: 14,285

Posted By LF-X

I have 33 JA Solar 300W Mono Black Panels (9.9kWp...

I have 33 JA Solar 300W Mono Black Panels (9.9kWp total) on the roof pointing in two directions (S-W and S-E) giving good coverage over the day.

2 Solax Inverters and 4 Strings.

They were...

Forum: Conservation

10-24-18, 08:02 AM

Replies: 575

DIY ventilation heat exchanger

Views: 1,154,033

Posted By LF-X

will be interesting to see how much air flow you...

will be interesting to see how much air flow you get after filters and the heat exchanger. The fans you have provide 30 Pa max. That is not much.
Note that the air flow mentioned on the product page...

Forum: Conservation

06-03-18, 04:21 PM

Replies: 575

DIY ventilation heat exchanger

Views: 1,154,033

Posted By LF-X

Had 2 vents installed for some time (currenlty...

Had 2 vents installed for some time (currenlty I'm at three).
One pushing fresh air to thge bed room, one pulling bad air (smoke) from my office. Roughly 70 m³/h at full speed of the fans in and...

Forum: Conservation

05-04-18, 04:59 PM

Replies: 575

DIY ventilation heat exchanger

Views: 1,154,033

Posted By LF-X

with 50% duty cycle the inlet temp went up to...

with 50% duty cycle the inlet temp went up to 25°C with 26° attic temp while outside temp was 20°C. Not too bad.

Forum: Conservation

05-04-18, 07:42 AM

Replies: 575

DIY ventilation heat exchanger

Views: 1,154,033

Posted By LF-X

Increased fan duty cycle from 20% to 30% an hour...

Increased fan duty cycle from 20% to 30% an hour ago.

Some numbers to get a feeling on what the unit is doing right now:

Outside temp: 19°C (Fresh air comes from here)
Attic Temp: 26°C (This...

Forum: Conservation

05-04-18, 06:31 AM

Replies: 575

DIY ventilation heat exchanger

Views: 1,154,033

Posted By LF-X

Update: Ventilation unit now moved to one of...

Update:

Ventilation unit now moved to one of the attics (there are 2 seperated ones) and first 100mm vent is ducted to the unit, Pumping fresh air to the sleeping room.

Suction duct is...

Forum: Conservation

04-04-18, 05:34 PM

Replies: 575

DIY ventilation heat exchanger

Views: 1,154,033

Posted By LF-X

Pics or it didn't happen. Cabling done for now. A...

Pics or it didn't happen. Cabling done for now. A bit adventurous, but works.
Need to order ducts and vents.

Anemometer gives me something like 160 m³/h. But it's a bit hard to measure...
...

Forum: Conservation

04-04-18, 04:38 AM

Replies: 575

DIY ventilation heat exchanger

Views: 1,154,033

Posted By LF-X

Just registered here. This thread is awesome and...

Just registered here. This thread is awesome and the best DIY discussion on the internet I found so far.

I'm currently building a HRV unit myself. Will be installed in a 112m² house....

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