Date: 15/09/2019
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Here in Middle TN, we use our air-conditioners more months of the year than our heat. In fact, the average electricity consumption for Tennessee households is 33% higher than the national average (EIA, 2015 report) and is among the highest in the nation! So anything that can help keep us cool while also saving money is a welcome relief!  Here are some tips to help you stay cool and save money during the summer:




First, let’s look inside your home…

  1. Install a programmable thermostat:  According to the US Dept of Energy, this can save you hundreds of dollars per year – and not just during the summer months, but year-round!
  1. Use LED lights:  LED bulbs are 75% more efficient because they eliminate most of the heat produced by traditional lighting… which means your air-conditioner doesn’t have to work as hard.
  1. Circulate the air:  Use a fan to keep the air moving, especially on upper floors.  Moving air causes faster evaporation from the skin and has a cooling effect - making it feel up to 8 degrees cooler - without touching that thermostat.
  1. Smart cooking:  Decrease indoor heat by using a microwave oven, rather than your thermal oven or stove, whenever possible.  Better yet, eat foods like salads that do not require cooking.  If you must boil or bake, do so in the evening when it’s cooler.
  1. Use exhaust fans wisely:  Make sure you turn on the vent fans in areas that create moisture, like the shower, bathroom, kitchen, and laundry room, and turn them off as soon as most of  the moisture has dissipated, so you’re not exhausting cold air to the outside!  If you do not have exhaust fans, consider installing some.
  1. Replace air filters:  every 3 months or more frequently, if needed. If you have spring and summer allergies, buy the higher quality air filters that can filter out pollens.
  1. Keep the sun out:  Use drapes, blinds, shades or screens to block the sunlight, especially during the hottest part of the day, or when you’re not at home.
  1. Get a tune-up:  Regular maintenance by your HVAC system professional will keep your air-conditioning running at optimal efficiency and will address potential failures, thus saving you money in the long-run. 
  1. Optimize air flow:  Make sure all supply and return vents are open and unblocked. Keep all doors and windows closed and make sure they’re well-sealed.  Seal any leaks in the ductwork and around windows.
  1. Insulate the attic:  Adding attic insulation, while making sure the attic is well-vented by keeping the eaves unobstructed, is the best investment you can make. And it pays for itself by saving you money year-round.

Now, let’s see what can be done outside your home to keep you cooler and save money….

  1. Clear it out: Keep the area surrounding your outdoor unit clear of all obstructions 2-3 feet all the way around. Don’t allow the lawn mower to discharge grass clippings into the unit. Weekly, remove debris such as leaves, pollen, and twigs from the top and sides of the outdoor unit, and keep plants and shrubs trimmed. If the outdoor unit is crowded by a fence or shrubs, or if the bottom few inches is buried under mulch, air-flow will be restricted, which decreases your air-conditioner’s efficiency, reduces its life span, and damages the unit.
  1. Provide shade: Keep your outside unit in the shade as much as possible. This can boost air conditioning efficiency by up to 10%.  
  1. Light colors:  Just as wearing light-colored clothing helps keep you cooler, painting the exterior of your house a lighter color, or having a lighter colored roof will keep the home cooler. Although your house won’t absorb as much heat in the winter, the net energy savings in summer far exceed the energy penalty in the winter, especially in our region of the country.
  1. Upgrade your windows. Installing double or triple pane windows will save energy year-round. But, if you can’t do that, try adding a reflective window film to your existing windows.  This will reflect heat before it can come through the glass, and it’s transparent, so you can still see out.
  1. Update your HVAC: If your HVAC system is more than 15 years old, you can cut your utility bills by up to half if you switch it out for one of the new higher efficiency units. Or use some of the newer technologies, like a mini-split, in certain areas of your home.

At Interstate AC Service, we’re here for all your heating and air-conditioning needs.  If you live in the Nashville or surrounding area, call on us at 615-832-8500.  Let us help you keep cool this summer.

Important Tips & Advice



You often don't think about your heating or air-conditioning system until something goes wrong. But there is so much you can do to help keep your system from breaking down. We regularly post information to help you learn what you can do to keep your system running, to save money and energy.  Search our many posts, videos, and podcasts, for valuable information that is never a sales pitch. Subscribe to receive an email when something new is posted, so you won’t miss any important tips.

Choosing a Repair Company

Whether you’re talking about heating or cooling, repairing or replacing a system, you want a company that can advise you reliably based on what is in your best interest, not based on what is convenient or what earns them the most money (commissions). We'll help you choose the best solution to fit your needs. Check out our many posts at HVAC News You Can Use and our podcasts.

Going Green

We're concerned about the environment and know all the latest technologies - such as geothermal systems, LED lights, and smart thermostats - that can reduce energy and put more "green" in your pocket!  We've provided HVAC systems in certified LEED buildings and written many posts on ways to Go Green.

The Sign of Service

We are a repair company performing a full range of commercial and residential heating, air conditioning, energy management and comfort products service, maintenance, and installation. We are a locally-owned company serving Nashville-Davidson County and the surrounding counties including Williamson, Rutherford, Wilson, Sumner, Robertson, and Cheatham.

Who We Are

Our service technicians are fully trained and experienced.  We can tackle the most complicated system to the simplest of systems – from large commercial plants to single-family homes.  Our ownership group of Eddie Hutton, Tony Anderson, Roger Eldridge,  Swaney Powers and Alan Seilbeck have over 125 years combined experience as leaders in the HVAC industry.


We are proud of our dispatchers that respond to your telephone call. When your system is down they make things happen. Our trucks are loaded with most parts needed for a quick repair. You can call day and night 7 days a week. Our normal weekday hours are 7:00AM to 5:00PM. Click on the button below to schedule a service call online. Emails and forms can only be answered weekdays from 7-5.”  

615-832-8500 Online Service Call


Did you know you should service your HVAC on a regular schedule – just like you would your car?  We have specialized maintenance programs to ensure the clean, energy efficient and safe operation of your HVAC systems.  This helps minimize service interruptions/breakdowns and maximize your equipment's lifespan.  All maintenance contract customers are assigned a primary technician that will get to know your facility and equipment and will treat it like his own.  You’ll receive discounts on repairs or new installations, and get priority service when it is cold or hot outside and you need service promptly.  Plus, maintenance contract customers are never charged overtime rates for emergency services after-hours, weekends or holidays. We’ll teach you how to save on maintenance costs by showing you things you can do yourself and when you need a technician. Here are some good posts:  Repair vs. Replace, Things to Try Before Calling for Service, Springtime Tips that Pay Off.


Our team takes on HVAC projects for office, school, retail and industrial facilities. Check out these case studies:

Replacement of a 250-ton Cooling Tower

Ductless HVAC at Brentwood Middle School