4 ms·

Yeah, it's far from optimal, sadly. The best I found for my device were (allegedly) ePM1 70%. We get quite a lot of smoke exposure from badly behaved fireplaces

by RGamma 3y ago

Yeah, it's far from optimal, sadly. The best I found for my device were (allegedly) ePM1 70%. We get quite a lot of smoke exposure from badly behaved fireplaces/unsuitable (palette) wood right now and it reeks. Got any suggestions how I could retrofit a better filter solution for my device (Zehnder ComfoSpot50). It has "slotted" filters like these https://cleanfilter.eu/en/product/zehnder-comfospot-50-filters/?v=3a52f3c22ed6 https://cleanfilter.eu/en/product/zehnder-comfospot-50-filte.... Maybe something to chain outside in front of the intake or inside after the outlet (though I'm afraid I could run the Comfospot out of specs..)? Or I guess I could kind of suboptimally get a standalone one. These handheld particle counters look intriguing. Unfortunately a bit on the expensive side... Maybe I can borrow one, might give me some hard data for contacting my municipality about this.

amluto 3y ago
I bought one of these to jury-rig into a Zehnder system: https://www.hvacquick.com/products/residential/Air-Filters/Powered-HEPA-Filters/HVACQuick-IFHB-Series-Inline-HEPA-Filter-Boxes https://www.hvacquick.com/products/residential/Air-Filters/P... Haven’t actually finished connecting it yet. It’s nicely constructed, though.
- RGamma 3y ago
  Looks good. Though it would be massive PITA to fit that with my device :( I'll look around a bit but I'll probably get a standalone indoor one.
  - amluto 3y ago
    IKEA has IMO the best standalone air filter right now.
    - RGamma 3y ago
      Already ordered a Levoit Vital 200S Pro. Levoit EverestAir unfortunately is unavailable here. IQAir Atem X and Allermed devices, that I've read good things about, are too expensive right now (and too large as well, considering the ~20m^2 room is relatively crammed). Hope the device is a sane choice. As usual I needed to prevent myself from overanalyzing while battling spam blogs and broken corporate sites. The IKEA things apparently are "only" EPA12, but totally ok for my case... Might still evaluate one if the Levoit doesn't perform well for some reason.
      - amluto 3y ago
        I think IKEA is on the right track with their lower efficiency filter. For a standalone air filter, you care about the rate of removal of contaminants, which is roughly (concentration of contaminants) · (flow rate) · (filter efficiency), and you probably end up caring the most about the particle size at which the filter is least efficient. So a real HEPA filter has .9995 for that last factor, and .99 is barely worse. Even MERV 13 at 75% or so isn’t so bad. For a given amount of power consumption, you end up with (concentration of contaminants) · (flow rate) · (filter efficiency) / (power), which is (at fixed contaminant level and a fixed quality of fan) roughly proportional to (filter efficiency) / (pressure drop at design flow rate) and this is where IKEA is making the right tradeoff: those non-HEPA filters have considerably less pressure drop and only fail to filter a percent or so of the air going through.
        RGamma 3y ago
        Yeah, the Starkvind seems a better long term choice wrt energy consumption (and perhaps filter availability, but definitely filter price (performance?)). Thanks for the input and enjoy the new year.

by RGamma 3y ago

amluto 3y ago

I bought one of these to jury-rig into a Zehnder system: https://www.hvacquick.com/products/residential/Air-Filters/Powered-HEPA-Filters/HVACQuick-IFHB-Series-Inline-HEPA-Filter-Boxes https://www.hvacquick.com/products/residential/Air-Filters/P... Haven’t actually finished connecting it yet. It’s nicely constructed, though.

RGamma 3y ago
Looks good. Though it would be massive PITA to fit that with my device :( I'll look around a bit but I'll probably get a standalone indoor one.
- amluto 3y ago
  IKEA has IMO the best standalone air filter right now.
  - RGamma 3y ago
    Already ordered a Levoit Vital 200S Pro. Levoit EverestAir unfortunately is unavailable here. IQAir Atem X and Allermed devices, that I've read good things about, are too expensive right now (and too large as well, considering the ~20m^2 room is relatively crammed). Hope the device is a sane choice. As usual I needed to prevent myself from overanalyzing while battling spam blogs and broken corporate sites. The IKEA things apparently are "only" EPA12, but totally ok for my case... Might still evaluate one if the Levoit doesn't perform well for some reason.
    - amluto 3y ago
      I think IKEA is on the right track with their lower efficiency filter. For a standalone air filter, you care about the rate of removal of contaminants, which is roughly (concentration of contaminants) · (flow rate) · (filter efficiency), and you probably end up caring the most about the particle size at which the filter is least efficient. So a real HEPA filter has .9995 for that last factor, and .99 is barely worse. Even MERV 13 at 75% or so isn’t so bad. For a given amount of power consumption, you end up with (concentration of contaminants) · (flow rate) · (filter efficiency) / (power), which is (at fixed contaminant level and a fixed quality of fan) roughly proportional to (filter efficiency) / (pressure drop at design flow rate) and this is where IKEA is making the right tradeoff: those non-HEPA filters have considerably less pressure drop and only fail to filter a percent or so of the air going through.
      - RGamma 3y ago
        Yeah, the Starkvind seems a better long term choice wrt energy consumption (and perhaps filter availability, but definitely filter price (performance?)). Thanks for the input and enjoy the new year.