Swap the filter.

The portable HEPA unit running in this library reading room has gone past its filter's rated service life -- the Clean Air Delivery Rate quietly drops as the filter loads, and nobody re-checks the room until the unit is doing next to nothing. Swapping the cartridge to the manufacturer's rated media and re-measuring PM2.5 confirms the unit is actually working again, not just running.

Where

a public library reading room, Rankin, TX 79778 (Upton County); best-estimate location near the town center, exact address not confirmed · Open the map

Pay

$80 proposed

This packet is not funded yet, so this figure is a proposed price and not money waiting in escrow. If a buyer funds it, approved proof settles that price onchain. If nobody funds it, approved proof earns provable credit toward the work instead of cash — recorded, and readable any time at vealth.net/labor/credit/(your wallet). You see which before you claim, never after.

Proof

filter service-life confirm + pre-swap PM2.5 reading + loaded-filter photo + post-swap PM2.5 reading + GPS

This is exactly what gets it approved. Nothing settles without it.

Level

entry

Open until

2026-11-19

Posted by

0x034F…6c89

The creator wallet. Its signature is what approves proof and settles the wage.

How this work is done

A documented method, so this packet comes out the same whoever does it.

Steps

1. 1. Confirm the unit's model and filter part number, and check the elapsed run time or filter-change indicator against the manufacturer's rated service life.
2. 2. Take a PM2.5 reading at the room's center point with the loaded filter still in place, running at its rated setting, to record the unit's current performance.
3. 3. Power down, remove the loaded filter, and photograph it against a light source to show the visible loading.
4. 4. Install the new filter to the manufacturer's rated part and orientation, restart the unit, and take a second PM2.5 reading after the stated run interval.
5. 5. Record the elapsed time since the prior filter change and log the swap date for the next interval.

What counts as done

• Filter part number and elapsed service-life or indicator reading confirmed against the manufacturer's rated interval
• PM2.5 reading with the old filter still running, before the swap
• Photo of the removed, visibly loaded filter
• PM2.5 reading after the new filter is running, showing restored performance

Proof is measured against these, not judged by taste.

The standard this serves

Indoor Air Quality. Indoor air quality is the health of the air where people actually live, and most of us are indoors nine hours in ten. The standards give it numbers: carbon dioxide that tells whether fresh air is reaching a room, fine dust, fumes from finishes, moisture that invites mold. Mastery looks like reading a room's air the way a doctor reads a pulse, and knowing which fix matters first. It is learned meter in hand. This packet is one room measured honestly, and one measured room is worth a hundred guesses.