Understanding CEER Rating: AC Energy-Efficiency (+ CEER Chart)

combined energy efficiency ratio for air conditioners explained

In the Energy Star certification program for room air conditioners, there is Section 3: Core Qualification Criteria that states: “CEER shall be greater than or equal to the Minimum CEER (CEERmin) as calculated per Equation 2.” If you open a window AC unit’s specification sheet, you will likely see the CEER rating between 8-15. Here … Read more

kVa To Amps Calculator: How To Convert kVa To Amps? (Examples)

kVA (kiloVolt-Ampere) is a compounded unit. It’s comprised of both electrical potential (Volts) and electrical current (Amps). 1 kVA is a frequently used unit; it represents 1,000 Volt-Amperes. In many cases, it’s useful to convert kVA to amps.  The most common question here is ‘How many amps is x kVA’. To calculate the amps, we … Read more

AFUE Rating For Furnaces: How To Calculate AFUE Savings?

AFUE rating stands for ‘Annual Fuel Utilization Efficiency’. This is a key energy-efficiency rating for furnaces, and it’s most commonly used when evaluating the energy efficiency of gas furnaces. In the most basic sense, the AFUE rating tells us what percentage of fuel (natural gas, propane, oil) is converted into heat. Here are two examples … Read more

HSPF Rating Explained: How Efficient Are High HSPF Heat Pumps?

what is hspf rating

When it comes to heating devices, there is no single specification more important than the HSPF rating. HSPF rating is the key metric for all heating devices; be it heat pumps, furnaces, or water heaters. Understanding it gives you the fundamental insight into all heating devices. In fact, it’s so important that every larger heating … Read more