How to Calculate HVAC Energy Savings Like the Pros

Calculate HVAC energy savings

Are you contemplating changing your older air con and/or heating gear within the hopes of decreasing your vitality payments? In case your gear is 10 years previous or extra, and particularly when you’ve got had a variety of latest restore points, it’s sensible to look into it. However how a lot HVAC vitality financial savings might you see, and is it value investing in new gear?

On this article, we’ll share a free instrument utilized by HVAC specialists that makes it straightforward to crunch the numbers. Plus we’ll clarify the phrases and rankings used to check new energy-efficient air con and heating gear.

HVAC vitality financial savings: how a lot financial savings will you get with new gear?

In case your HVAC gear is nearing the top of its life span (usually 10 years for residential techniques, and nearer to fifteen years for industrial techniques), and it’s been unreliable or under-performing, chances are high your vitality payments are spiking. That’s as a result of older gear loses effectivity over time. It runs longer to succeed in set temperature, which makes use of extra vitality.

Whenever you spend money on extra energy-efficient gear, your vitality utilization will go down. The query is, will your HVAC vitality financial savings add as much as sufficient to justify the up-front expense of latest gear? 

To reply that query, you want some cheap estimates of how a lot vitality financial savings you might get by changing gear. And naturally, the gear you select impacts how a lot it can save you. 

So let’s begin with a fast primer on the vitality effectivity phrases and rankings used to check the effectivity of latest HVAC gear.

Phrases for evaluating HVAC vitality effectivity

SEER measures vitality effectivity for air conditioners

SEER stands for Seasonal Power Effectivity Score. SEER measures the vitality effectivity of cooling gear, calculated based mostly on a seasonal common. Each new unit has been assigned a SEER ranking, and you’ll evaluate rankings between the completely different items you’re contemplating. The next SEER ranking means the unit has higher vitality effectivity and decrease electrical energy utilization. 

Based on U.S. Division of Power laws, all new air con techniques put in in our space (New York) will need to have a minimal ranking of 13. At present’s most effective central air con techniques have SEER rankings between 20 and 28. Warmth pumps and ductless mini-split techniques can have rankings of 30 or greater. Likelihood is, your older unit’s SEER ranking is lower than 10.

AFUE measures vitality effectivity for heating techniques

AFUE stands for Annual Gasoline Utilization Effectivity. AFUE measures the vitality effectivity of heating gear, particularly furnaces powered by pure gasoline, oil, or propane. Like SEER rankings for AC items, new heating techniques have AFUE rankings that can assist you evaluate the vitality effectivity. Larger AFUE rankings imply higher vitality effectivity and decrease gasoline utilization.

The U.S. Division of Power laws set the minimal AFUE at 90 % effectivity for brand new techniques put in within the northern a part of the nation. Many new excessive effectivity gasoline furnaces have rankings as excessive as 98 %.

A useful instrument for calculating HVAC vitality financial savings 

So how can you determine how a lot vitality you stand to avoid wasting by upgrading to extra environment friendly gear? An online calculator from ServiceTitan, an organization that gives instruments to the HVAC trade, makes it easy to get an excellent estimate.

Find out how to calculate HVAC vitality financial savings for brand new AC techniques 

To calculate HVAC vitality effectivity for a brand new air conditioner, you’ll want the next data:

Capability of your present air conditioner. That is measured in BTUs (British Thermal Items), representing the quantity of warmth the unit can take away from the air in an hour. Professionals additionally discuss with a unit’s capability as “dimension” nevertheless it has nothing to do with how large the unit is. You will discover it on the unit’s producer label, close to the mannequin and serial quantity.

Price of Electrical energy (KWH). To get an correct estimate, discover out the speed you’re paying for electrical energy per kilowatt hour. You will discover this in your electrical energy invoice.

SEER ranking of your present unit’s SEER ranking. Search for a yellow “Power Information” sticker in your unit, which reveals its SEER ranking. 

SEER rankings of latest techniques you’re contemplating. You will discover these in gross sales quotes, on product tags, and on product web site pages.

With this data, it’s fast and simple to calculate HVAC vitality financial savings. Within the calculator tool, choose COOLING on the prime. Enter your state, your electrical energy charge, the SEER of your previous unit, and the SEER of a brand new unit you’re contemplating. Then hit CALCULATE. 

The chart on the fitting reveals you the way a lot cash you’ll save over 5 years, 10 years, and 15 years with a brand new system that has the required SEER ranking.

You may also simply do the same calculation for a brand new heating system by choosing the HEATING choice of the highest of the instrument.

Find out how to be sure you get the vitality financial savings you count on

It’s vital to understand that the calculated HVAC vitality financial savings characterize optimum values for a system that’s accurately sized, correctly put in, and commonly maintained.

So be sure you work with a trusted skilled to pick and set up your new gear, and don’t neglect common upkeep to maintain your system in good situation.

Be taught extra about the perfect choices for brand new industrial substitute AC techniques with Arista’s useful information: The Ultimate Guide to NYC Light Commercial Air Conditioning.

Should you’re within the NYC space, contact Arista for a upkeep settlement estimate.


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