December 2023 EnergyWiseSM Tip: Air-Source Heat Pump Optimization

December 14, 2023

By: NPPD Energy Efficiency Program Manager Cory Fuehrer


Many Nebraska homes use an air-source heat pump (ASHP) to provide indoor comfort during the winter season. Considering 40% of average annual residential energy is used to keep homes warm, ASHPs provide higher energy efficiency than any furnace. As a result, owners reduce the impact of increased energy needs during the three coldest months of December through February.

But much like any appliance, how ASHPs are used and maintained will effect how much energy they save. If your home or business is heated by an ASHP, consider the following recommendations to get the most from your system.

Properly Install an ASHP

Optimal performance starts with proper installation of the right heat pump. Oversized heat pumps can cycle on and off more often than they ought to, which often leads to premature breakdowns. This can also lead to unbalanced temperature and humidity levels throughout the home causing possible comfort and health concerns. A variable capacity heat pump (i.e., one where the compressor’s speed can vary), will alleviate those concerns. Be sure the HVAC professional you select performs a load calculation on your home to determine the right size of ASHP is installed. The load calculation identifies the amounts of heating and cooling your home will require throughout the year. For accuracy, the contractor measures windows, doors, walls, ceiling height, etc. and uses a computer program to assess all values.

Change Air Filters Regularly

Changing air filters every one to three months helps your system move air more easily and ensures better indoor air quality. Electrostatic and reusable filters should be washed quarterly. The frequency of cleaning can range from weeks to months depending on use and dust volume. After a couple of times, you should have an idea of how often your system requires this maintenance.

Use a Smart Thermostat

A smart thermostat can help you take advantage of energy savings by setting the thermostat back during nighttime and unoccupied hours, then preventing auxiliary or emergency heat from engaging while returning to the previous setting. Many smart thermostats program themselves by learning your household’s routines and can easily be adjusted via a mobile device on days that are not routine. Consult your HVAC technician to identify which smart thermostats are compatible with your heat pump.

Keep Outdoor Units Clear

The key to an ASHP’s winter efficiency comes from its ability to capture heat from outdoors and transfer it into the home. For that to happen, the outdoor unit must have adequate space around it for proper airflow. Clear any debris or obstructions that may hinder the heat pump’s performance. Know that when an ASHP goes through its defrost cycle, the moisture driven off the outdoor coils can pool and refreeze under the outdoor unit. During extended cold periods, the refrozen ice can continue to build up and restrict airflow under the unit. Most ASHP outdoor units are installed on extended legs to prevent this from being a problem. Otherwise, excess ice must be removed.

Perform Routine Inspection, Maintenance and Cleaning

Since ASHPs provide heating and cooling to your home, they likely operate for more hours than other residential HVAC systems. At a minimum, have a professional HVAC technician perform a system tune-up to clean outdoor coils, check refrigerant levels, inspect critical components and advise how to get the best performance from your particular ASHP system.

Along with Southwest Public Power District, Nebraska Public Power District wants to help you keep your home or business comfortably warm this winter. They may also provide EnergyWiseSM incentives to defray the cost of purchasing a heat pump, smart thermostat or having your heat pump system tuned-up by a professional HVAC contractor. For more ideas on how you can make your home or business EnergyWiseSM, contact them, or visit www.energywisenebraska.com for more information.

October 7, 2026
If you have your expensive electronic devices plugged into surge protectors, good for you! But if you bought surge protectors, plugged everything into them and forgot all about them, you could be overlooking a potential problem: Old surge protectors wear out and need replacing every now and then. Surge protectors do not last forever. The components that absorb electrical surges can wear out over time. After enough surges, a device may continue working as a power strip while providing little or no surge protection.. Check your surge protector occasionally. Many models have an indicator light that shows whether surge protection is still active. If the light is off, consult the manufacturer's instructions. It may be time for a replacement. Inspect the device’s cord and outlets. Replace the unit if you see scorch marks, cracks, frayed wires or other damage. A power strip that feels unusually warm should also be replaced. Experts often recommend replacing surge protectors every few years, especially in areas that experience frequent storms and power fluctuations.  A quick inspection takes only a minute. A stereo system or piece of home theater equipment that gets fried during a power surge ruins that investment forever.
October 2, 2026
Ceiling fans can make a room feel cooler. But they do not actually lower the temperature in that space. According to the U.S. Department of Energy, fans create a wind-chill effect that helps people feel cooler. The room itself does not become cooler. In fact, DOE says, ceiling fans may allow homeowners to raise the thermostat setting by about 4 degrees in the summer without reducing comfort. That means a fan saves energy only when people are there to enjoy the breeze. Running a ceiling fan in an empty room does not improve comfort and uses electricity unnecessarily. Also, did you know that you need to change the direction that your fan blades spin every spring and fall?  During summer, ceiling fans should rotate counterclockwise. That pushes air downward and creates the cooling effect people feel. Running them in the wrong direction for the season won’t keep you comfortable.
September 30, 2026
Southwest Public Power District has an opening for the position of Journeyman or Apprentice power line worker for the Benkelman location. Duties include, but are not limited to, maintenance and construction of overhead and underground distribution and sub-transmission facilities. The District operating hours are a compressed work schedule with every other Friday off. After-hours and on-call duty are required. This position requires heavy lifting, pole climbing, and other strenuous activity and working well with other crew members. Must be able to complete associated written and electronic documentation. Must possess a valid Class B CDL and pass a pre-employment drug and alcohol test. Southwest Public Power District offers an excellent wage and benefit package, including paid vacation, sick leave, paid health insurance, and funded retirement plan. Southwest Public Power District’s headquarters office is in Palisade, Nebraska. The region’s schools, small communities, and recreational opportunities make it a great place to live and raise a family. Interested individuals must email a resume, including job training and three references to: jobs@swppd.com. Southwest Public Power District is an equal opportunity employer. Position will be open until filled.
September 23, 2026
When an electric bill suddenly rises, many people assume their electric cooperative raised its rates. Sometimes that’s the case. But more often, the biggest reason is simple: You used more electricity. According to the U.S. Energy Information Administration, nearly 90% of U.S. households use air conditioning. During hot weather, cooling systems run longer and more often. Even if the price of electricity stays the same, using more electricity means a higher bill. Heat waves can have a bigger effect than you might realize. A few extra days of very hot weather may cause an air conditioner to run for hours longer each day. Refrigerators, freezers and dehumidifiers may also work harder during extreme heat. If your bill seems unusually high, compare your electricity use with the same month last year. Most utility bills show the number of kilowatt-hours used. That number can tell you whether the increase came from higher use, higher rates or a combination of both. You can also look for simple causes if you notice an unexpected jump in your energy use. A clogged air filter, a thermostat set a few degrees lower than usual or windows receiving direct afternoon sun can all increase cooling costs.  The next time your electric bill arrives, don't just look at the amount due. Check how much electricity you used. The answer to a higher bill is often hiding in that number.
September 16, 2026
By: NPPD's Energy Efficiency Program Manager Cory Fuehrer According to Consumer Reports , 2018 was the first automotive production year when more new models were equipped with light-emitting diode (LED) headlights than halogen or high-intensity discharge (HID) headlights. Today, all new electric and hybrid vehicles are equipped with LEDS, as are most internal combustion engine vehicles. However, in June of 2026, of the 297.5 million registered vehicles in the United States, more than two-thirds were manufactured before 2018. If you drive one of these earlier-model cars, you are likely to be using the older lighting technologies to see your way down the road at night. Should you upgrade your headlights? Consider these points: Brighter illumination The number of lumens a light produces is a measurement of the total perceived light emitted by a source. As an example, a standard 100-watt incandescent lightbulb produces about 1,600 lumens. LED headlights produce 3,000 to 12,000 lumens to provide impressive lighting ranges that can reach beyond 300 yards. In comparison, halogen or HID headlights only produce 1,000 to 1,500 lumens and have a shorter lighting range that only reaches up to 150 yards. Energy Efficiency Depending on which headlights are being compared, LEDs are four to ten times more efficient than halogen or HID headlights in converting electricity to light. This is one of the main reasons LEDs can produce so many more lumens on an automobile’s headlamp circuit than the older technologies. Better visual acuity and safety When describing “white” light, the term “Kelvin” (using the symbol “K”) is used to describe how “warm” or “cool” the color is; the lower the Kelvin level, the warmer and more yellowish the light is. Traditional halogen and HID headlights produce light around 3200K. LED headlights produce crisp, directional white light around 5000K to 6500K, which improves contrast and distance visibility to the human eye. Less eye fatigue Studies have shown that the sharper contrast described above allows drivers to spot road signs, lane markings and obstacles much earlier, thus reducing cognitive and visual load during extended nighttime trips. Longer lifespan and lower overall cost Drivers using halogen or HID headlights typically get about 1,000 to 2,000 hours of use before they replace them again at an average cost of $20 to $60 per pair. Even though LED headlights cost three to five times more at an average cost of $50 to $175 per pair, they will last 30,000 to 50,000 hours and save money and time through fewer future replacements. Your local public power provider, in partnership with Nebraska Public Power District, wants to help you make the most of the energy they provide. That includes helping you safely and comfortably travel from point A to point B at night. To find additional ways electrical technologies can improve efficient use of energy in our lives, contact your local utility or visit www.energywisenebraska.com.
September 10, 2026
Smart thermostats promise to help homeowners save energy while keeping their homes comfortable. But are they worth the investment? The short answer: They’re worth it. Unlike traditional thermostats, smart models connect to home wi-fi and can be controlled through a smartphone app. Many also “learn” a household’s schedule and automatically adjust temperatures when people are asleep or away. When a smart thermostat lowers or raises the temperature for several hours a day, it can reduce heating and cooling costs. Because smart thermostats automate these adjustments, they can help households maintain energy-saving settings without anyone having to remember to change them manually. Some models also compile energy reports that show how often the system runs and offer suggestions for reducing energy use. However, smart thermostats may not be necessary for every home. If you live in an older home, you might need an electrician to install additional wiring to support yours. And smart units are pricier than basic programmable units. Plus, you need a stable internet connection for a smart model to operate consistently well. If you already have a programmable thermostat, a smart unit might not save you much additional money. And if you work at home all day and need to keep the heat or a/c at a comfortable setting, you won’t want a thermostat that automatically makes your home colder on winter days or warmer during summertime working hours.  Still, for homeowners who frequently forget to adjust the temperature or want the convenience of remote control, a smart thermostat can be a useful tool for improving comfort and managing energy use.
September 2, 2026
Summer heat can be tough on people. It can also be tough on batteries. Many of the devices we use every day contain lithium-ion batteries. That includes phones, laptops, tablets, power tools, e-bikes and e-scooters. These batteries work best when they stay within a moderate temperature range. Excessive heat can shorten battery life and, in rare cases, create safety risks. One of the worst places for a battery-powered device is a parked car. On a sunny day, temperatures inside a vehicle can climb quickly. Leaving a phone or laptop in a hot car can damage the battery and reduce its ability to hold a charge. Watch for warning signs. If a battery becomes unusually hot, starts swelling, leaks fluid or gives off a burning smell, stop using the device immediately. Damaged lithium-ion batteries can become dangerous. A few simple steps can help: • Keep devices out of direct sunlight. • Do not leave them in hot vehicles. • Use the charger recommended by the manufacturer. • If a battery-powered device becomes very hot while charging, unplug it and let it cool.  A little heat awareness can help your devices last longer and operate more safely.
August 20, 2026
By: NPPD's Energy Efficiency Program Manager Cory Fuehrer If you have traveled from Nebraska’s panhandle towards the southeast in the middle of summer, you likely know it can be a long and hot road trip. However, the further south and east you travel, you will probably notice that it is not only the temperature that is rising: humidity. High humidity can make those summer days feel even sweltering. While air-conditioning systems are tasked with removing most of this excess indoor humidity, many homes and businesses in the eastern half of the state also require stand-alone dehumidifiers to achieve acceptable levels. The Consumer Product Safety Commission and the U.S. Environmental Protection Agency recommend a humidity levels between 40 and 50% for most indoor environments. In addition to eliminating the muggy, clammy feeling, additional dehumidification can: Improve air quality Lessen allergy and asthma symptoms Inhibit mold growth Diminish musty odors Reduce airborne dust Suppress dust mites Protect a home or building’s structural integrity However, operating dehumidifiers can have a dramatic impact on summer utility bills. Even a medium-sized portable unit (50 pints per day) can add an additional $100 per month if the unit is set to operate continuously on its highest setting. If your home or business requires a separate dehumidifier to manage humidity level, here are some ideas of how to do it most efficiently. When shopping for a dehumidifier, purchase an ENERGY STAR®-certified model. Dehumidifiers that earn this certification use more efficient refrigeration coils, compressors and fans to remove the same amount of moisture as a similarly sized conventional unit but use about 15% less energy. Dehumidifier efficiency is measured with an Integrated Energy Factor (IEF), which is in the amount of electricity (kilowatt hours (kWh)) the unit consumes for each liter (L) of moisture removed from the air. To be eligible for certification, minimum IEF values are: Units rated up to 25 pints/day – IEF of =.70 L/kWh or greater. Units rated at 25.01 to 50 pints/day – IEF = 2.01 L/kWh or greater. Units at over 50 pints/day – IEF = 3.30 L/kWh or greater. Set the humidistat so the dehumidifier does not run continuously. For basements in the summertime, 50% relative humidity is recommended. In colder weather, relative humidity levels between 25 and 40% are advised to reduce condensation on windows. Tightly close all windows and doors to the area being conditioned to minimize humidity coming from outside air. Place the dehumidifier in the area with the highest humidity but avoid creating a safety hazard by placing it in or near water. Dehumidifiers are not the solution to standing water (or running water) in basements. Make sure the dehumidifier is connected to a properly grounded outlet. Position the dehumidifier away from the wall or furniture so air can freely circulate through the unit. Hook up a drain hose to the dehumidifier to eliminate the need to continuously empty the tank. Keep the dehumidifier clean. Wipe or vacuum dust and dirt from the coils and fan. If you have a choice of fan speeds, higher speeds are more efficient, though lower speeds are quieter. Reduce energy use during peak electric use periods. Put your dehumidifier on a timer to turn it on at 9 p.m. and off at 10 a.m. In partnership with Nebraska Public Power District, your local utility wants to help you stay cool, comfortable and healthy this summer. Contact them or visit www.enerywisenebraska.com if you would like more information on ways to improve your energy efficiency, as well as various EnergyWiseSM incentives that may be available to you for implementing energy efficient technologies.
August 13, 2026
Summer heat can be tough on people. It can also be tough on batteries. Many of the devices we use every day contain lithium-ion batteries. That includes phones, laptops, tablets, power tools, e-bikes and e-scooters. These batteries work best when they stay within a moderate temperature range. Excessive heat can shorten battery life and, in rare cases, create safety risks. One of the worst places for a battery-powered device is a parked car. On a sunny day, temperatures inside a vehicle can climb quickly. Leaving a phone or laptop in a hot car can damage the battery and reduce its ability to hold a charge. Watch for warning signs. If a battery becomes unusually hot, starts swelling, leaks fluid or gives off a burning smell, stop using the device immediately. Damaged lithium-ion batteries can become dangerous. A few simple steps can help: • Keep devices out of direct sunlight. • Do not leave them in hot vehicles. • Use the charger recommended by the manufacturer. • If a battery-powered device becomes very hot while charging, unplug it and let it cool. A little heat awareness can help your devices last longer and operate more safely.
August 5, 2026
During the summer, attic temperatures can climb far above outdoor levels, allowing heat to radiate down into living spaces. This hidden source of heat can make your air conditioning system work harder than necessary. Start by checking attic ventilation. Soffit and ridge vents should be clear and unobstructed to allow hot air to escape. Blocked vents can trap heat and increase indoor temperatures. Gaps around attic access points, such as pull-down stairs or hatches, can also allow hot air to enter the home. Sealing these areas with weatherstripping or insulation can help reduce heat transfer. In some cases, attic fans may improve airflow, but they should be used carefully to avoid disrupting the balance of the home’s ventilation system. Still, addressing attic heat does not require a full renovation. Even small improvements in insulation can make a difference by slowing the movement of heat into living areas.
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