Reviews & guides
Everything published here — 34 pages, and what kind of page each one is.
This is the whole index, not a highlight reel. Every page is one of three things, and it says which at the top, so you can tell in a glance whether you are getting a question answered out of the manufacturer’s own documents, a set of criteria to shop against, or a full pass through the published record.
What the labels mean
| Label | What the page does |
|---|---|
| Research review | A question answered by putting the maker’s published figures and the owner record side by side. This is the largest group on the site. |
| Buying guide | The criteria that decide a purchase, set out before you go shopping, with the trade-off named at each step. |
| Reference | One specific question answered out of the product’s own documentation — an interval, a fitment, a compatibility rule. |
The work behind every page above is the same one. Read what the maker publishes — the specification sheet, the manual, the warranty, the terms of the plan — then go through what the people who bought it report months later, and publish both the points where those two agree and the points where they do not.
Home Air 34 pages
Where running cost quietly overtakes the sticker price.
How often should you change an air purifier filter?
The 6-12 month figure is universal. The test behind it is published by exactly one company.
Best air purifier for cigarette smoke: what actually works
A HEPA clears the haze; only activated carbon touches the smell. Here is what actually decides whether a purifier helps with smoke.
Air purifier smells: four places the smell can live
A purifier has four places a smell can come from and only two are fixed by cleaning. How to tell which state yours is in, what the CADR number cannot tell you, and why ozone is the wrong answer.
Dehumidifier calculator
Pints per day from your floor area and how damp the space is, with the published cell named.
Dehumidifier capacity calculation: three methods, two answers
A room chart, a division by water class, and an airflow formula are all published as the way to calculate dehumidifier capacity. Two of them return pints per day and they disagree; the third is not a capacity calculation at all.
Sizing a Dehumidifier for a Crawl Space
The three published capacity cells, four disagreements between the two sizing methods, and one input no named source publishes.
Why is my dehumidifier freezing up?
The rating is measured at 65 °F. The unit is sold to run from 41 °F. Between those two figures is the band where the coil frosts — and no label mentions it.
Why is my dehumidifier leaking water?
Where the water appears narrows it to one of four places. Two of them are not faults at all.
Dehumidifier maintenance
Four colour bands with published boundaries, three functions behind one five-second gesture, and a full-tank warning that silences itself in sleep mode.
Why is my dehumidifier not collecting water?
The label is measured at 65 °F and 60% relative humidity. If the room is cooler or drier than that, the machine is not broken — it is outside the condition the number describes.
Dehumidifier not working
Six causes for "does not operate", five of them not faults. One defrost state that looks like a dead compressor. Five error codes, one of which keeps the unit running.
Dehumidifier vs air conditioner: which one your room needs
An air conditioner removes moisture only while it is cooling. If the room is cool and still damp, it cannot fix that.
Do you actually need a dehumidifier?
The same dehumidifier was a “70-pint” unit in 2018 and a “50-pint” unit in 2020. Nothing inside changed.
How long do air purifier filters actually last?
None of these timers know whether your filter is actually dirty.
How long do dehumidifiers take to work?
The rating test period is two hours. The day in “pints per day” is a unit in an equation, not a run. And the one number everybody wants — how long your space takes — is not published anywhere.
How long does a humidifier last? The number is in the warranty
No humidifier maker publishes an average lifespan. What two warranties do publish is a term: two years, reached either outright or by registering inside fourteen days. What the term excludes, what voids it, and the three records that decide whether it survives.
How long is 2,000 hours?
2,000 hours is 83 days only if the thing never stops. At eight hours a day it is 250 days; at four, 500.
How many pints dehumidifier do I need?
The published chart answers it in pints per day. The same page uses pints for the tank, which is an amount, and the rating is taken at one fixed temperature. Here is the cell and the basis behind it.
How much does it cost to run a dehumidifier
The federal standard sets litres per kilowatt-hour, not watts. Invert it and the three legal size bands give $76, $123 and $99 a year — the middle one costs most.
How often should you clean a humidifier?
How to clean a dehumidifier
One lid, two filters, opposite rules: the mesh washes, the particle filter is replaced. And the manual's three intervals all land in the same four-to-six-week window.
Three manuals, three vinegar recipes for the same humidifier
Three humidifier manuals give three different vinegar concentrations for the same job. Your manual wins. Here are the recipes side by side, what they share, and what vinegar never fixes.
How to clean an air purifier filter
Only the outer pre-filter can be washed. Here is which layer you are holding, the published 2 to 4 week interval, and what water does to the layer that cannot take it.
How to empty a dehumidifier
Two exits, not two options: once a hose is fitted the tank stays empty by design. And a hose only works downhill, which is why a basement with no drain has no hose answer.
Descaling a humidifier is two jobs, and the manual draws the lines
A scale removal and a disinfection are separate jobs with separate chemicals. What the manufacturer's manual forbids: submerging the base, mixing the two solutions, and washing any component in a dishwasher.
How often should you replace a humidifier filter?
A wick can stop working while it still looks white and clean.
Mold in a humidifier: the side you cannot reach
Mould in a humidifier keeps coming back from the side you cannot dismantle. Which parts come off, which ones do not, and what the maker says to do about the sealed path.
Humidifier not working: three states, not one fault
A humidifier that will not work is usually one of three states: it refuses to start, it runs without making mist, or water ends up outside it. The check that separates them, why cleaning is on the list of causes, and the half of leaks that are not leaks.
White dust from a humidifier
White dust is the minerals in your water, flung into the air by ultrasonic humidifiers. Here is which units make it, what water stops it, and how to suppress it.
What size dehumidifier for 1,000 sq ft: 20–30 pints, or 80?
One published table returns 20–30 pints a day for 1,000 sq ft. One published formula returns 80. Both are real, and they are not the same pint.
What size dehumidifier for 2,000 sq ft: one unit, or three?
At 2,000 sq ft the published chart returns 30 or more pints a day, a floor with no ceiling, while the drying formula returns 320 — more than twice the largest single unit for the work. The answer stops being a size and becomes a count.
What size dehumidifier for 500 sq ft: 20–30 pints, or 40?
Two published methods size the same 500 sq ft space: the chart returns 20–30 pints a day, the drying formula 40. Both still describe one machine; the tank decides.
What size dehumidifier do I need for a basement?
The published sizing table, the temperature basis behind today's ratings, and why a cold basement breaks the chart.
Where should a dehumidifier be placed?
20 cm all round, 40 cm at the outlet, a 5–35 °C window, and a level floor that holds it full. The manual also names one room it will not allow — twice.
Not sure where to start?
How we research sets out the method behind every page above, and the disclosure sets out how the site is funded.