Example: A 1500 watt heater is running on a standard 120V. How many amops does it draw? Exactly 12.5 amps. How to find amperage or amps from watts? To convert electrical power to electrical current (Watts to Amps), we need to use the electrical power equation: P = I × V or Watts = Amps … Read more
Here’s a bit of the history of how CADR rating was invented: In the 80s, all talk with air purifiers was about maximum airflow (measured in CFM) and filters. But nobody really could tell how effective this or that air purifier was at actually removing pollutants such as dust, smoke, mold spores from indoor air. … Read more
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
There are several HVAC metrics for energy efficiency. In many cases, the Energy-Efficiency Ratio (EER) is specified on the specification sheets. However, one of the most basic heating/cooling metrics – Coefficient Of Performance (COP) – is not. Fortunately, you can easily convert COP from EER (as well as EER from known COP) with these two … Read more
Some HVAC devices such as mini-split AC units come with a SEER rating instead of an EER rating. If you’re like us and like to compare specification sheets, you can calculate EER if you know SEER. Here is a simple calculator that converts SEER to EER. Just input SEER rating, and the converter will calculate … Read more
EER and SEER both measure the energy efficiency of HVAC devices such as air conditioners and heat pumps. EER = ‘Energy Efficiency Ratio’ measures energy efficiency at 100% cooling load, 50% humidity, and 95°F to 80°F temperature difference. SEER = ‘Seasonal Energy Efficiency Ratio’ measures energy efficiency throughout the summer (June, July, August). You can … Read more
EER or Energy-Efficiency Ratio is an energy performance rating for, primarily, cooling devices. You will find them in any air conditioner specification sheet. The energy-efficiency ratio is invaluable when comparing different air conditioners as far as energy-efficiency is concerned. What is EER? Definition: EER rating provides you with a ratio of useful cooling output (in … Read more
COP or Coefficient Of Performance is the most basic energy-efficiency metric of any heat engine. It’s instrumental when comparing heat pumps, fridges, and air conditioners. Definition: COP is the ratio of how much useful heat (or cold) a heat pump will produce if we give it certain energy input. Basically, it tells us how much … Read more