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HVAC Metrics And Calculators

How Many Watts In A 12 Volt Battery? (Calculator + Chart)

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A lot of people have asked us to determine how many watts are in a 12-volt battery. 12-volt battery wattage is very simple to solve, and we will show you how. On top of that, you can use: ‘How Many Watts In A 12V Battery’ Calculator found below. Basically, you just insert the battery capacity … Read more

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kWh To BTU Calculator + Chart (Simplest Converter)

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kWh To BTU Calculator

There are many cases when you will have to convert kWh to BTU. Luckily, it’s very easy to do this conversion. Let’s quickly summarize what kWh and BTU mean: kWh stands for kilowatt-hour. This is a unit of electrical energy and is defined as an amount of electricity used to run a 1,000W (1kW) device for 1 … Read more

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Convert BTU To kWh: Simple BTU To Killowatt-Hour Conversion + Chart

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Convert BTU To kWh calculator

In many cases, you will need to convert BTU to kWh. For example, if you need to know how many kWh does your 12,000 BTU air conditioner uses every hour, you just need to convert BTU to kWh. Let’s first summarize what BTU and kWh are: BTU stands for British Thermal Unit. This is a … Read more

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Amp Hour Calculator: How To Calculate Amp Hours Of A Battery?

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With all batteries, we best know amp-hours (Ah) and watt-hours (Wh). This will allow us to estimate how long will a battery run an electric device or evaluate how many amp-hours do you need for running an electric device. That’s why we will look at how to calculate amp hours of a battery. Here’s the … Read more

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Dew Point Calculator + Dew Point Chart (With Formula)

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Dew point has always been difficult to calculate. Namely, the dew point is a temperature at which moisture in the air starts to condensate on the surface (forming dew). This is a classic gas to liquid conversion. To simplify how to calculate the dew point, we are going to look at the dew point formula, … Read more

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How To Calculate SEER Rating? Here’s How SEER Is Calculated

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seer rating calculation

SEER stands for Seasonal Energy Efficiency Ratio. This is the most commonly used metric to denote how energy-efficient HVAC units like air conditioners, heat pumps, and furnaces are. We are going to look at how to calculate the SEER rating. The SEER rating is not as easily calculated as the EER rating (Energy Efficiency Ratio). EER … Read more

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CFM To CFH: Easiest Conversion You Will Find (+ Calculator)

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Converting CFM to CFH is incredibly easy. Both are units that measure airflow. Basically, you just multiply CFM by 60 to get CFH. CFM stands for Cubic Feet per Minute. 100 CFM airflow means that 100 cubic feet of air is produced by a device in 1 minute. CFH stands for Cubic Feet per Hour. … Read more

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SCFM Vs CFM Explained: With SCFM To CFM Calculator (+ Chart)

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Both CFM and SCFM are units for measuring airflow. That can be an airflow generated by an air conditioner, furnace, ceiling fan, compressor, and other HVAC devices. CFM stands for Cubic Feet per Minute. SCFM stands for Standard Cubic Feet per Minute. As we see, the only difference between SCFM and CFM is that inclusion … Read more

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Simple Sones To dB Calculator (With 0.3, 1.5, 3.0 Sone Examples)

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Loudness is measured in decibels, right? Most of us are familiar with decibels (dB) when describing how loud something is. That’s why we might be surprised when we see noise levels expressed in ‘Sones’. We have prepared a Sones to dB calculator to help you out. To convert Sones to dB, we use the following … Read more

Categories Fans, HVAC Metrics And Calculators Leave a comment

How Long Will A 100Ah Battery Last? 100W, 400W + Calculator

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100Ah batteries are quite big. They can be used for RV, as solar batteries, or even car batteries. You can imagine that one of the most frequent questions regarding the 100 amp hours batteries is this one: “How long will a 100Ah battery last?” This can be quite easily calculated if you understand the basic … Read more

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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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