The energy efficiency of heat pumps is expressed in COP (Coefficient Of Performance). On the heat pump’s specs sheets and EnergyGuide labels, however, you will only see HSPF (Heating Seasonal Performance Factor). Because HSPF directly depends on COP, we can easily convert HSPF to COP. Below, you will find these two very useful resources if … Read more
If you open heat pump specs sheets, you will see the HSPF5 rating and HSPF4 rating. Obviously, we want to know what is the heat pump HSPF rating – denoting the heating energy efficiency – but this HSPF5 vs HSPF4 rating might give us a pause. Let’s explain what both HSPF5 and HSPF4 ratings are … Read more
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
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
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
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
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
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
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
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