seen from China
seen from United States
seen from United States
seen from United States
seen from United States
seen from Spain
seen from Australia
seen from United Kingdom
seen from Netherlands
seen from Sweden
seen from Australia
seen from Paraguay
seen from Brazil
seen from United States
seen from Switzerland
seen from Sweden
seen from Singapore
seen from Sweden
seen from United States
seen from Poland
Do Try This At Home
Do Try This At Home
Indoor air quality has been a joke for too long, but somehow it is the Covid episode that has now provided the urgency to do something about it, in homes and offices. With our representation of Dexwet Pure Air, we are deeply involved. It so happens that I have some Midea Inverter-based A/C units, they are marketed as U-Shaped. With a minor modification (to the filter), I was able to fit a Dexwet…
View On WordPress
MERV Ratings and More
MERV Ratings and More
An excellent article appeared on EnergyVanguard dealing with the unintended consequences of the current drive to shift to MERV 13 filters in HVAC systems. The bottom line is a long list of potential side effects of simply upgrading your filters to MERV13 in a system that was not designed for it. The whole problem is that within the legacy model of air filtration as you go up the scale from let’s…
View On WordPress
Dexwet Neerob Month Two
Dexwet Neerob Month Two
The second month had mild weather with the door to the restaurant open most of the time and the A/C was not running a lot. In short, not a lot of more accumulation of dust was seen on the filter, but I post the pictures for the sake of history: very fine dust beginning to settle on the filter The inside mesh filter still squeaky clean So there you have it that’s our progress for the…
View On WordPress
From the Toy Department
From the Toy Department
There was a fascinating report in the news the other day about a very interesting air filtration project, one of those brilliant solutions based on an innovative way of using every day materials. The headline was: New air purifiers filter at least 90% of Covid-carrying particles, researchers say. Absolutely amazing stufff, but it demonstrates several key problems with this type of active…
View On WordPress
Steam and Respiratory Infections
Steam and Respiratory Infections
The truth is, steam radiators were designed to keep you warm with the windows open, because after the 1918 flu epidemic people understood that sunlight and fresh air were the best desinfectants. All of that knowledge was lost during the various energy crises, when the agenda shifted to economizing on heat, and tightening up building envelopes. There are numerous avenues of achieving this,…
View On WordPress
Dexwet One Month Performance
Dexwet One Month Performance
On August 16th, 2021 we installed the first “public” Dexwet Pure Air filter in the US at Neerob Restaurant in the Parkchester area of the Bronx. On September 17th, we inspected the installation, and did a show and tell at the restaurant. Below are two pictures to document the results: The filter is starting to collect some fine dust The Mesh filter inside of the wall unit What he first…
View On WordPress
