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Air Conditioners

Explained: DOE BTU SACC Vs ASHRAE In Portable AC Units

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The single most important metric of any portable air conditioner is capacity. This denotes how powerful a portable AC unit is. The problem arises when we see 2 different numbers for capacity: BTU ASHRAE. These are British Thermal Units, measured by the American Society of Heating, Refrigeration, and Air Conditioning Engineers. This is the old … Read more

Categories AC Calculators And Converters, Portable Air Conditioners 3 Comments

How Many BTU To Cool 500 Sq Ft? (+ 500 Sq Ft AC Recommendations)

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Sizing an air conditioner for 500 square feet seems simple enough. It’s not all that difficult to figure out how many BTUs do you need to cool 500 sq ft of living space. Nonetheless, many people get the BTUs wrong. That’s why we will explain how you go about figuring out how many BTUs air … Read more

Categories Air Conditioners Leave a comment

Does Window Air Conditioner Pull Air From Outside? (Wildfire Concerns)

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does a window air conditioner bring air from outside

Do window AC units pull air from outside? We don’t usually wonder from where the cold air comes from. However, when you see wildfires burning, and the sky being orange from all the smoke, you don’t really want all that dangerous smoke in your home. That’s why question “do air conditioners take in air from … Read more

Categories Window Air Conditioners 3 Comments

Daikin Mini Split Reviews (Specs Comparison Of 26 Daikin AC Units)

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Daikin is a Japanese company, based in Osaka. They are known for their innovative air conditioning technologies. In fact, the first split and multi-split air conditioner were developed by Daikin. On top of that, they have invented the variable refrigerant flow air conditioners, known today as the VRV AC units. Daikin mini-split systems are the … Read more

Categories Air Conditioners, Mini Splits 8 Comments

4 Best Outdoor Air Conditioners For Patios, Decks, etc. (2025)

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Let’s start this article on outdoor air conditioners with a newsflash: There are no outdoor air conditioners. An air conditioner is a specialized device that, based on the 2nd Law of Thermodynamics, facilitates heat exchange between two isolated spaces. Outdoors, in essence, is just one big space. Don’t worry. If you’re looking to buy an … Read more

Categories Air Conditioners, Portable Air Conditioners Leave a comment

AC Compressor Replacement Costs In 2025 ($700 to $3,400)

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“Just not the AC compressor.” The compressor is the last thing you want to break down in your central, mini-split, or window air conditioner. When it does, however, you have to replace it (or buy a new AC unit?). Here we will go over the complete AC compressor replacement cost estimate process to answer a … Read more

Categories Air Conditioners, Central Air Conditioners, Mini Splits 10 Comments

Rebates For New Air Conditioning Units 2021 (+10% Tax Deductibles)

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With some luck, you don’t have to pay the full price for an air conditioner. Every year, there are 100s of rebates for new air conditioner units, and 2021 is no different. Rebates for new air conditioners are used to primarily promote high energy-efficient air conditioners. Here are just some examples of rebates you can … Read more

Categories Air Conditioners Leave a comment

4 Best Window AC Support Brackets (Brackets For Air Conditioner)

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All window air conditioners have to be fixed. It’s almost impossible for the window sill alone to support all the weight of a heavy AC unit. That’s why every elevated outdoor air conditioner (be it window unit, or outdoor mini-split unit) needs to be fixed in place by an AC support bracket. In some places, … Read more

Categories Air Conditioners, Window Air Conditioners 2 Comments

4 Biggest Portable Air Conditioners For Large Rooms (699+ Sq Ft)

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The biggest portable air conditioner, the better. That’s usually the right rationale when choosing a portable air conditioner for large rooms. You want as much cooling effect (measured in BTU or British Thermal Units) as possible. Choosing the biggest portable AC unit is the best guarantee for adequate cooling of larger rooms (up to about … Read more

Categories Air Conditioners, Portable Air Conditioners 4 Comments

4 Biggest Window Air Conditioners For Large Rooms (24,000+ BTU)

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Why not get the biggest window air conditioner? If you have to install just a window AC unit and are looking to get as much cooling effect as possible, you should buy the biggest window AC unit there is. Window air conditioners for large rooms can effectively cool down places with 1,500+ sq ft. The … Read more

Categories Air Conditioners, Window Air Conditioners 2 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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