Lux D790 Royal
- Thread starter Mike81
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I would still use a HEPA filter with these despite of using synthetic bags. The newer Lux models Intelligence and S115 have synthetic bags by default but still use HEPA filters. So using a synthetic bag doesn't completely make HEPA filters useless.
The problem with the D790 is that the original HEPA filter is very expensive and there are no aftermarket filters available like there are for D820 and newer models. I have done some experiments and it's quite easy to replace the original D790 HEPA filter with and aftermarket one that is meant for Bosch/Siemens vacuum cleaners. It costs about 6 euros when the original Lux one costs 61 euros. The sides of this "wrong" filter have to be cut a bit and some glue has to be used but it can be fitted to the HEPA box quite easily (and if you modify the box it becomes even easier). The original filter is much thicker and probably is more efficient but when it comes to the price my solutuion most likely is a very good compromise (and one can replace the filter more often because it's so much cheaper than the original).
The problem with the D790 is that the original HEPA filter is very expensive and there are no aftermarket filters available like there are for D820 and newer models. I have done some experiments and it's quite easy to replace the original D790 HEPA filter with and aftermarket one that is meant for Bosch/Siemens vacuum cleaners. It costs about 6 euros when the original Lux one costs 61 euros. The sides of this "wrong" filter have to be cut a bit and some glue has to be used but it can be fitted to the HEPA box quite easily (and if you modify the box it becomes even easier). The original filter is much thicker and probably is more efficient but when it comes to the price my solutuion most likely is a very good compromise (and one can replace the filter more often because it's so much cheaper than the original).
Hepa filter would certainly improve the filtration. Aftermarket (genuine not available) fleece bags are quite thin so tiny bit of dust will escape to the bag compartment. That's why I have upgraded the pre motor filter. Original pre motor filter is very coarse and it allows dust to go to the motor. I measured the bag casing for the hepa filter and 96 x 157mm is the filter holder size for the hepa filter. Bosch/Siemens hepa filter is interesting option.
The material used in the picture as an ungraded pre-motor filter might reduce the suction quite significally when used with this particular machine. There are also other materialis available that work a bit better. Though they might let more dust through.
Modding an Electrolux/Volta green HEPA filter (also about 5 euros) is possible too, but the filter needs to be cut even more than the Bosch/Siemens one (a circular saw is a good tool for that). The best situation is to have an old genuine Lux filter that can be used as a casing for the "wrong" aftermarket filter after removing the filter material. Then there is no need for modifying the HEPA case.
Modding an Electrolux/Volta green HEPA filter (also about 5 euros) is possible too, but the filter needs to be cut even more than the Bosch/Siemens one (a circular saw is a good tool for that). The best situation is to have an old genuine Lux filter that can be used as a casing for the "wrong" aftermarket filter after removing the filter material. Then there is no need for modifying the HEPA case.
What I used for the pre motor filter is just a foam (2 cm thick) from old mattress. It shouldn't limit the suction, but I have to measure it and compare measurements to the original.
It would be interesting to see your hepa mod pictures.
It would be interesting to see your hepa mod pictures.
