Frequently Asked Questions

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5-Star Customer Service with Gerner Energy

Have a question about your heating and air conditioning equipment? Wondering what the price for heating oil, propane or diesel fuel is in the Greater Baltimore area? Gerner Energy is here to help! 

See if your inquiry is included in the list of frequently asked questions below. If you can’t find the answer you’re looking for here, feel free to contact our office online or call (410) 472-2022.

Heating Oil

Before you panic, go through this no-heat checklist!

  1. Check your fuel tank gauge. Do you need heating oil? If it is empty, call Gerner Energy right away to place your order.
  2. If you have fuel, check the thermostat. Make sure the setting is on HEAT and that the cooling function is not on instead.
  3. Check that all furnace and emergency switches are ON.
  4. Press the RESET button on your furnace ONCE ONLY.

If none of these tips help, call Gerner Energy right away to schedule your heating service! (410) 472-2022

If you’d like to manage your heating oil orders on a will-call basis, you can order here. Gerner Energy provides full-service HVAC assistance and delivers competitively-priced fuel oil to every customer who requests it. Click here to save money on your will-call orders today. If you’d rather sign up for automatic delivery, you can take advantage of our low pricing and payment plan options, too.

If you’re monitoring your own heating oil levels, please place your order when your tank is filled to 20-30% of its capacity. To ditch the responsibility of monitoring oil levels on your own, sign up for automatic delivery and let us take care of it for you. You’ll never run out of oil, and you don’t even have to be home when we deliver automatically.

Yes, Gerner Energy delivers diesel to the majority of our service area. We know that many customers rely on diesel fuel for its efficient operation and fuel economy. Please don’t hesitate to contact us for your all diesel needs. We will happily bring the fuel right to your location.

You can easily sign up for automatic delivery here, which allows you to rest easy while we take care of your oil needs. You’ll always have fuel when you need it, without having to remember to place an order each month.

Our minimum delivery quantity is 100 gallons. We understand that people have budgets and sometimes require lower quantities for their deliveries. The price per gallon is more since we are delivering much less but we try to be flexible to the needs of our customers. Our most competitive price point starts at 150 gallons.

In most cases we will deliver by the next day. Since we have multiple trucks out delivering each day, if you get into an urgent situation we typically can squeeze these deliveries into our routes on the same day. We understand that we live hectic lives and forget about heating oil and propane, we suggest going on our worry free automatic delivery and let Gerner Energy keep your heat on!

Our pricing is based on the amount of gallons we deliver. The bigger your tank, the bigger the delivery and lower the pricing. Our most competitive price point starts at 150 gallons. We do offer a group discount program if you can get three or more members to join a group, you can all save together!

Yes, we have a department that specializes in diesel/oil/propane tank work. We can replace tanks, fix supply lines, gauges and vents. Give us a call to get a quote.


Reading your propane tank fuel gauge is not complicated, but can be confusing. First, you must locate the gauge by looking under the dome of your propane tank. There you will find black numbers surrounding the circumference of the gauge and a pointer needle indicating a percentage.

Based on the physical properties of propane, tanks are considered full when the gauge reads 85%. This allows for any expansion of propane vapor. If your gauge ever falls below 20% you should contact Gerner Energy immediately at 410-472-2022 for a refill. It is safest to refill your tank before the gauge falls below 20%.

Tank Size in Gallons
Gauge Reads1205001000
20%- critical25100200

Tank ownership does come with the responsibility of upkeep of the tank but Gerner Energy has you covered for that as well.

Below are industry recommendations for propane tank maintenance:

Above Ground Tanks

Underground Tanks

In most cases we will deliver by the next day. Since we have multiple trucks out delivering each day, if you get into an urgent situation we typically can squeeze these deliveries into our routes on the same day. We understand that we live hectic lives and forget about heating oil and propane, we suggest going on our worry free monitored delivery and let Gerner Energy worry about keeping your tanks filled.


Gerner Energy has the perfect solution for worry-free automatic delivery, wireless tank monitors.
With Monitored Delivery, we are able to track real-time tank levels and schedule a delivery when your tank starts running low. 
As a customer on Automatic Delivery, you receive:
  • Best price per gallon for your tank size
  • State of the art tank monitors
  • Access to smartphone app
  • Alerts to notify us if there is a problem with your system

Find out more information, or to sign up, here.


Our prebuy programs typically open up towards the end of the summer and run through the spring. Give our office a call for more information about this and what your prebuy price would be for this season. 410-472-2022.
  • DOT cylinders are those that meet the Department of Transportation’s specifications. These cylinders are smaller than ASME tanks and are designed with portability in mind. For example, you might use a DOT cylinder to power your grill. Much larger DOT cylinders might stay in one place because of their size, but they can still technically be relocated even when full. Because transporting propane poses certain risks, though, those who do so must follow specific regulations set forth by the DOT. They must also maintain their tanks, which means arranging for recertification 12 years after the original manufacture date and then every five years for the life of the cylinder.
  • ASME tanks get their name from the American Society of Engineers. These vessels are designed for permanent installation on a property. Because they have thicker steel and are not exposed to the same hazards that mobile DOT cylinders are, recertification is not required. ASME tanks are measured in gallons. Common tank sizes range from 120 gallons to 2,000 gallons. The capacity of DOT cylinders, on the other hand, is measured in pounds of water. They might range in size from 5 pounds to 420 pounds.

Cathodic protection prevents corrosion by applying DC current from an external source, forcing the tank to become cathode. Sacrificial systems are used when the amount of current required for the protection is small, such as in underground propane tanks.
Read more about Cathodic Protection here.

General FAQs

We are open for business 24 hours a day, 7 days per week. You can order fuel online day or night!

Gerner Energy is proud to serve many families and businesses throughout the Greater Baltimore area and Southern York County, PA. We love what we do, which is providing reliable fuel delivery and professional HVAC service. We are pleased to offer premium heating oil delivery, propane delivery, tank installationdiesel delivery, oil tank protection, A/C servicesheating tune-ups, and more.

View the list of towns we serve on our service area page to see if you serve your town.

Have questions? Contact us today!

We accept payment by cash, check or credit card (Visa, MasterCard, and Discover). We can also set-up direct ACH bank transfers.


People who avoid annual service appointments often end up with either no heat or A/C, or costly repairs on equipment that could have been set straight proactively. In Maryland, heating and cooling equipment has to work hard all year, meaning that annual service appointments are highly recommended. They will save you money and headaches in the long run.

Yes, we do.

By using the Maryland Energy Assistance Program at a discount heating oil company like Gerner, your funding will go further, providing you with more gallons for your dollar. Want to apply for this program? Click here.

We install and service ductless mini-split air conditioners, which are excellent for energy-efficient, zoned cooling. View our A/C installation and service page to learn more or request service.

If you want to enroll in a comprehensive Cooling Service Plan, please click here.

Yes, we deliver to both residential and commercial locations. Some commercial accounts require additional taxes based on how the fuel is being used.


We work with many groups, businesses, religious organizations, and schools to offer discounts to their members. Give us a call to see if your group participates. If they don’t we can get them set-up today!


We’re humbled when our customers recommend us to their friends, families, and neighbors. As a local business, that is the biggest praise that we can receive. We like to reward both the referrer and the referee – take a look at our current referral program offer.

Over 90% of our customers don’t have long-term contracts with us. The only time that we do offer contracts is to benefit the customer with our prebuy programs. Aside from that, our customers stick with us because of the great prices and service that we provide.

We are passionate about servicing our customers. That is the difference at Gerner Energy. A live person is always available to help you at almost any time. We offer many ways to communicate with us, phone, email, text message, web chat and in-person. You can place heating oil deliveries online 24 hours a day, you get the same pricing and same great service as if you called us. Give it a try, it is super easy!

Our everyday market rate is very competitive so our prices are always discounted compared to other companies. The best way to save with Gerner Energy is to go on our worry free automatic delivery. Unlike many other energy suppliers, we give our automatic delivery customers our best rates. Let us monitor your tank and you save money!

Aside from automatic delivery options, many of our customers save through our group and affiliate programs or by referring their friends and family members so both can enjoy savings on their fuel coss.

As a small, local business, reviews help us tremendously in reaching new customers, and separating us from the out-of-town conglomerate organizations.

We are VERY proud of all of the 5-star reviews that we receive online. 

You can Leave Us Feedback here, or share your review directly with Google, Facebook, or Nextdoor.

We’re always on the lookout for motivated individuals to join our rapidly growing Heating Oil & Propane Company! We offer competitive wages, a generous benefits package, and a work environment that is fast-paced and fun.

View our current open positions here.