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Air Purifiers

Where To Place Air Purifier? (7 Golden ‘Best Place’ Rules + Bonus Tip)

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where should i put an air purifier in a room

Two identical air purifiers can have a completely different impact on the indoor air quality. And it all comes down to where you place the air purifier. Generally, you can increase the efficiency of the air purifier by up to 20% if you correctly place it. What is even more important, if you put it … Read more

Categories Air Purifiers 67 Comments

How Do Air Purifiers Work? (Basics Explained: Fan + Filters)

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explaination of how air purifier work to clean air

The basic concept of how air purifiers work is quite simple. We start with the need for every household to have a high indoor air quality. According to the EPA’s Indoor Air Quality report: “Americans, on average, spend approximately 90 percent of their time indoors, where the concentrations of some pollutants are often 2 to … Read more

Categories Air Purifiers 1 Comment

9 Best Air Purifiers In 2025 (529 Top Air Purifiers Spec-By-Spec Anaylsis)

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list of best air purifiers currently on the market

The best air purifiers are, essentially, 3D Roombas. Roomba will vacuum the floor (2D space) and make sure we don’t get our feet dirty. The top-rated air purifiers do much the same job in 3D space; they increase the air quality in our homes and protect our lungs. Note about the methodology of selecting the … Read more

Categories Air Purifiers 6 Comments

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

Air Changes Per Hour Calculator (CFM Based Formula + Examples)

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calculator that calculates air changes per hour from cfm and ach formula

ACH or Air Changes Per Hour is a metric that tells us how many times an HVAC device can fill up the full volume of a room with air. This is especially useful when comparing different air purifiers or air conditioners. Example: Let’s take an air purifier with 250 CFM airflow. We put it in … Read more

Categories Air Purifiers, Fans, HVAC Metrics And Calculators 60 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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