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Air Quality

4 Best Air Purifier And Humidifier Combos In 2025 (2-In-1 Units)

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We all want to breathe clean air. Dry air is a nuisance as well, dries out our eyes and skin. To produce both clean and non-dry air, you can get 1 stand-alone air purifier and 1 stand-alone humidifier. But why pay for and deal with 2 devices if you can just get a 2-in-1 air … Read more

Categories Air Purifiers, Air Quality Leave a comment

How To Smoke Indoors Without It Smelling? (5 Tips For Room, Bathroom, House)

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ways of how to smoke in your room without it smelling

Of course, we’re smoking indoors. It’s warm, cozy, and we love the freedom of not having to go out and smoke. Put the ashtray on the table and lit it up. We all just have one problem: Indoor smoking in your room, unfortunately, smells. Cigarette smoke can linger for days. It’s not pleasant, it’s not … Read more

Categories Air Quality Leave a comment

5 Best Medical-Grade Air Purifiers In 2025 (With H13 HEPA Filters)

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best hepa air purifiers with h13 filters

Not all HEPA filters are alike. You might have come across expressions like ‘True HEPA’, ‘HEPA-like’, ‘H13 HEPA’, and ‘Medical-Grade HEPA’. Are all these the same kind of filter, or are there differences between them? Here’s the key part you need to know when picking the best medical-grade air purifiers: Medical-Grade Filters = H13 HEPA … Read more

Categories Air Purifiers, Air Quality Leave a comment

5 Medify Air Purifier Reviewed: MA-40 vs MA-25 vs MA-18 vs MA-15 vs MA-14

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comparison of the 5 best medify air purifiers with reviews and ratings

H13 HEPA filters. That’s what makes Medify air purifiers so thorough. When comparing different air purifiers, the Modify air purifiers are considered one of the best brands. The reason for that is very apparent: Medify produces H13 HEPA air purifiers (also known as medical-grade HEPA). Not the same as standard HEPA air purifiers. Standard HEPA … Read more

Categories Air Purifiers, Air Quality 2 Comments

GermGuardian Air Purifier Reviews: 6 Best Models Compared & Rated

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reviews of germguardian air cleaners with specification comparison

GermGuardian is an aptly named brand of air purifiers. In a sense, the GermGuardian air purifiers are your ‘Guardian’ against ‘Germs’. Of at least that’s how they want to present their units. As we know, pre-filters, HEPA filters, and activated carbon filters don’t really destroy germs; bacteria, and viruses. The main component of all GermGuardian … Read more

Categories Air Purifiers, Air Quality Leave a comment

BlueAir Purifier 2025 Reviews: 6 Models Compared, Reviewed, Rated

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comparison of blue air purifiers

“Indoor air pollutants are unwanted, sometimes harmful materials in the air. Indoor air pollution is among the top five environmental health risks.” (EPA’s Guide On Air Cleaners) EPA is not the only agency that raises concerns about indoor air pollution. Natur Vards Verket, the Swedish version of EPA, is another. Sweden’s answer to indoor air … Read more

Categories Air Purifiers, Air Quality 1 Comment

Dyson HP01 vs. HP02 vs. HP04 Comparison: Which One Is The Best?

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comparison of hp01 versus hp02 versus hp04 from dyson pure hot+cool air purifier series

“Dyson HP02 is just HP01 with the Link app and +$100 price tag.” “Obviously, HP04 is the best Dyson air purifier, HP01 and HP02 don’t even come close.” Dyson’s Pure Hot+Cool series is fantastic. If you check the chatter about HP01 vs. HP02 vs. HP04, these 2 preconceptions here are just the start. One thing … Read more

Categories Air Purifiers, Air Quality Leave a comment

Winix Air Purifier Reviews: Best 6 Model Compared And Rated (2025)

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best winix air cleaners compared

Indoor air pollution is a problem. It’s not about the wildfires alone. EPA regularly clarifies that indoor air has from 200% to 500% worse air index than outdoor air. Winix air purifiers are designed for one purpose: Remove indoor air pollutants, and thereby increase the quality of the air we breathe. Of course, Winix is … Read more

Categories Air Purifiers, Air Quality 6 Comments

7 Best Honeywell Air Purifiers In 2025: Compared, Reviewed, Rated

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honeywell hpa300 while being reviewed

“Just give me a standard reliable no-nonsense air purifier.” If you walk up to Home Depot and say the above to the customer service, they will most probably show you Honeywell air purifiers. Honeywell, in general, makes all kinds of HVAC devices. Their air purifiers are considered very reliable. On top of that, Honeywell air … Read more

Categories Air Purifiers, Air Quality 10 Comments

5 Best Coway Air Purifiers In 2025: Reviewed, Compared, Rated

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reviews of top 5 coway air cleaners

Coway is a big name in the air purifiers industry. Actually, we can almost say ‘the’ big name. This once small Korean company has been established in 1989 and focused on home health. Fast-forward 30 years: Coway is one of the biggest air purifiers brands with almost 5,000 employees. They are present in 40+ countries … Read more

Categories Air Purifiers, Air Quality 1 Comment
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Relevant HVAC Certificates:

energy efficiency guide

HVAC metrics:

SEER = (1 × EER100% + 42 × EER75% + 45 × EER50% + 12 × 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 Δh (std. air)

Sensible Heat (BTU/hr) = 1.1 x CFM x Δt (std. air)

Latent Heat (BTU/hr) = 0.69 x CFM x Δgr. (std. air)

1 HP = 746 Watts

1 kW = 3413 BTU

 

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