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Air Quality

7 Best Levoit Air Purifier Reviewed: Are They Any Good? (2025)

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7 levoit air purifier compared

Price-performance. That’s the motto behind the best Levoit air purifiers. The world is full of luxury air purifiers. They are beautifully designed, have fancy new technology, and usually cost more than $500 per unit. Levoit is the No. 1 brand when it comes to price performance. The best Levoit purifiers are just as capable of … Read more

Categories Air Purifiers, Air Quality 2 Comments

Airdog X5 Air Purifier Review: Washable Filters! (+Specs)

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airdog air purifier rating

 Silicon Valley guys are always trying to improve stuff by solving problems. To properly review the Airdog X5 air purifier, it’s useful to understand how this ‘Most Innovative Air Purifier in 2020’ was invented. The problem Califonia’s Airdog X5 team wanted to improve upon was this: People love their air purifiers. But they have to … Read more

Categories Air Purifiers, Air Quality 2 Comments

3 Okaysou Air Purifier Reviews: Are They Any Good?

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Okaysou are pretty much the best bang-for-your-buck air purifiers. This cannot be stressed enough: The one thing that constantly came up in writing this Okaysou air purifier review is, “I can’t believe how great filtration system AirMax8L has. It’s only $120. You shouldn’t be able to get Medical Grade HEPA filters for that, much less … Read more

Categories Air Purifiers, Air Quality Leave a comment

12 Best Dyson Air Purifiers Compared + Reviewed (2025)

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dyson air purifiers compared and reviewed

Dyson air purifiers are head-turners. With Dyson, you don’t really have to ask, “Are Dyson air purifiers any good?”. Dyson is known to create top-notch air purifiers, has an established reputation of almost 30 years now, and everybody loves their devices. Their prices; not so much. All models – from Dyson DP04 to most premium … Read more

Categories Air Purifiers, Air Quality 2 Comments

5 Best Air Scrubbers For Any Kind Of Project (+Specs)

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5 500 HEPA filter air scrubbers reviewed

“There is dust all over the place. What was the contractor thinking? Why didn’t they use an air scrubber to suck the dust away?” If you work in construction, renovation, and demolition, you know the struggle. Contractor work and dust go hand in hand. Customers will either complain about it or not be pleased with … Read more

Categories Air Purifiers, Air Quality 1 Comment

6 Best Air Purifiers For Mold In 2025 (With UV-C Filters)

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Here’s why air purifiers for mold are important: Visible and even smelly mold growth is one of the most common and most resilient home infections. You know that corner in your kitchen, bathroom or basement that looks darkish? You better hope it’s not the black mold. Pretty much every air purifier you can find will … Read more

Categories Air Purifiers, Air Quality 1 Comment

5 Best Residential Air Curtains For Home (36” To 72” Width)

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Air curtains for home (or wind curtains) are specialized HVAC devices that separate conditioned air and unconditioned air. Air curtains also prevent insects, flies, smoke, and dust to come through the door. We can all agree that running an air conditioner is pretty much useless if we have an open door. All the cool air … Read more

Categories Air Curtains, Air Quality 24 Comments

7 Best Dehumidifiers For Basement In 2025 (1.85+ Energy Factor)

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best dehumidifiers comparison based on specification sheets

“Over time, high humidity levels can eat through your basement walls.” A dehumidifier for the basement is an HVAC device that is fast becoming one of the most important parts of maintaining a healthy house. People started to realize that mold and mildew growth isn’t only nasty (in addition to allergies and pest problems); it … Read more

Categories Air Quality, Dehumidifiers 5 Comments
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Relevant HVAC Certificates:

energy efficiency guide

HVAC metrics:

SEER = (1 ร— EER100% + 42 ร— EER75% + 45 ร— EER50% + 12 ร— EER25%)/100

EER = BTUcooling/W

HSPF = BTUheating/W

COP = Q (useful heat)/W (input work)

ACH = CFM x 60/Area x Heightceiling

Total Heat (BTU/hr.) = 4.5 x CFM x ฮ”h (std. air)

Sensible Heat (BTU/hr) = 1.1 x CFM x ฮ”t (std. air)

Latent Heat (BTU/hr) = 0.69 x CFM x ฮ”gr. (std. air)

1 HP = 746 Watts

1 kW = 3413 BTU

 

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