Summer thunderstorms, high winds, and winter ice can knock out power across Kentuckiana with little warning. When the lights go out, so do your furnace or air conditioner, refrigerator, sump pump, and Wi-Fi. A whole house generator turns back on automatically within seconds, so your home stays safe and comfortable until the grid is restored. Allegiance Heating & Air provides generator installation, repair, and maintenance for homeowners in Louisville, KY, and across Southern Indiana, backed by the same honest, dependable service our customers have trusted since 2005.
Why Homeowners Choose a Whole House Generator
A standby generator is permanently installed outside your home and connected to your electrical system. Unlike a portable generator, there are no extension cords to run and no fuel cans to fill. It monitors your power around the clock and starts on its own when an outage occurs. That means you can:
- Keep your heating and air conditioning running through freezing nights and summer heat waves
- Protect your basement with a working sump pump during heavy storms
- Prevent spoiled food in refrigerators and freezers
- Power medical equipment that family members rely on
- Stay connected for work, school, and emergency updates
Looking for Generator Installation Near Me?
A generator is only as reliable as its installation. Our standby generator installation process is designed to get the right system in place safely and correctly the first time:
- In-home assessment: We review your electrical panel, your must-have appliances, and your fuel options.
- Sizing and selection: We recommend a generator sized to handle the loads that matter most to your household.
- Site preparation: We choose a location that meets clearance requirements and set the unit on a level pad.
- Fuel and electrical connections: We connect the generator to your fuel supply and install an automatic transfer switch.
- Permits and inspection: We help you navigate local permit and inspection requirements.
- Startup and walkthrough: We test the system under load and show you how it works.
If your electrical panel is older or near capacity, a panel upgrade may be recommended before installation.
How Big of a Generator Do I Need?
Generator size is measured in kilowatts (kW). Smaller units can power essential circuits like the refrigerator, sump pump, lights, and furnace blower. Larger units can run nearly everything in your home at once, including central air. The right size depends on your home's square footage, the appliances you want to power, and the startup demands of large equipment like AC compressors and well pumps. A professional load calculation helps you avoid paying for more generator than you need, or ending up with one that can't keep up.
Natural Gas vs. Propane
Most whole-home generators run on natural gas or propane. Natural gas connects directly to your existing utility line, so you never need to refuel, which makes it a convenient choice for homes in and around Louisville. Propane is a great option for rural homes without natural gas service. It's stored in an on-site tank and keeps well over time, so it's ready when you need it.
Transfer Switch vs. Interlock
An automatic transfer switch is what makes a standby generator hands-free. It senses an outage, safely disconnects your home from the utility grid, and starts the generator, then switches back when power returns. An interlock kit is a lower-cost device often paired with portable generators, but it requires you to manually start the generator and flip breakers. For true whole-home backup, an automatic transfer switch is the standard.
Generator Repair
A generator that won't start during a storm is more than an inconvenience. Call us if you notice:
- The generator doesn't start during an outage or weekly self-test
- Warning lights or error codes on the control panel
- Unusual noises, vibration, or smoke
- Fuel or oil leaks around the unit
- Power that flickers or cuts out while the generator is running
Our technicians diagnose the problem, explain your options clearly, and make repairs to get your backup power working again. We repair all major generator brands, including Generac, Kohler, Briggs & Stratton, Cummins, and Champion. Whether you need Kohler generator repair or service on another make, our technicians can help. With extended weekday hours and weekend availability, we're here when you need us most.
Generator Maintenance
Like your HVAC system, a standby generator needs regular care to perform reliably. Most generators sit idle for months and are expected to work perfectly the moment the power fails. Routine maintenance includes:
- Changing the oil and filters
- Inspecting spark plugs, belts, and hoses
- Testing and cleaning the battery
- Checking the transfer switch and electrical connections
- Running the generator under load to confirm it's working properly
We recommend generator maintenance at least once a year, or more often if your generator runs frequently. Our technicians handle Kohler generator maintenance and service other major brands. Ask about adding generator care to your Service Club membership, which already includes priority scheduling and member discounts on HVAC service.
Why Choose Allegiance Heating & Air?
- Local and trusted since 2005: We've served families across Louisville and Southern Indiana for more than 20 years.
- Licensed professionals: Our team takes safety and code compliance seriously on every job.
- One team for comfort and backup power: We understand how your generator and HVAC system work together.
- Flexible payment options: Ask about financing to make your generator investment more manageable.
Frequently Asked Questions
How long does a whole house generator last?
With regular maintenance, most standby generators last 20 to 30 years. Annual service helps you get the most life out of your system.
Are standby generators loud?
Modern standby generators are much quieter than portable models. Many sound similar to a central air conditioner running outside. Proper placement can further reduce noise inside your home.
Do I need a permit to install a generator?
In most areas, yes. Permits and inspections help ensure your generator is installed safely and to code. Requirements vary by city and county, and we'll explain what's needed for your home.
Can a generator run my central air conditioner?
Yes, if it's sized correctly. Air conditioners need extra power when they start, so your generator must be large enough to handle that demand along with your other appliances.
How much does a whole house generator cost?
Cost depends on the generator's size, fuel type, and the electrical and fuel work your home needs. We provide free estimates so you know your price before any work begins.
How often should my generator be serviced?
Most manufacturers recommend service at least once a year. Generators that run often during outages may need more frequent maintenance.
Get a Free Estimate on a Whole House Generator
Don't wait for the next storm to think about backup power. Our team will assess your home, recommend the right system, and give you a clear, upfront price. Request your free estimate or call 812-923-4406 today.
MAINTENANCE PLAN
ALLEGIANCE HEATING & AIR, LLC SERVICE CLUB
At Allegiance Heating & Air, LLC, we provideprofessional HVAC maintenance and offer exclusive deals and discounts within our Service Club Membership to those in and around New Albany, IN. Members of Allegiance Heating & Air, LLC Service Club receive the following benefits:
BENEFITS OF THE MAINTENANCE PLAN
One free cleaning on your A/C.
One free cleaning on your furnace.
Priority scheduling.
Free trip fee with service calls.
Reduced after-hours trip fees.
15% discount on parts and labor.
WHAT OUR CLIENTS HAVE TO SAY ABOUT US
We had a complete HVAC system and a hot water heater installed. The guys were professional, well mannered, and completed the work in a timely manner. Would definitely use them again.
I was nervous at first because my AC broke in the middle of 80 degree weather which is strange for April, but Allegiance Heating and Air was incredibly prompt and professional. The technician arrived within an hour, explained the problem clearly, and completed the repair. The technician , Mr. Garrett Moon was a very nice and courteous young man. He found the problem and fixed it within a timely manner. I highly recommend them for any heating or cooling needs. I’ll definitely give them a call again should I ever have another issue, but hopefully not. Knock on wood 😁. Give them a call… you won’t be disappointed!
From the moment I called to schedule a service, the team was quick to respond and arrived right on time. The technician was professional, friendly, and clearly knowledgeable about my heating system. He explained the repair options in plain language and completed the job efficiently. I appreciated the reliable service and the fact that the work was done the same day. I would definitely recommend Allegiance Heating and Air for any residential HVAC needs.
5/5 stars – I was very impressed with the efficient, affordable and timely service from Allegiance Heating and Air. The technician arrived on time, and performed the service quickly, no repairs needed at this time. Communication was clear and the whole experience felt hassle‑free. I would definitely recommend them for any residential HVAC needs.
Knowledgeable, experienced individual.
Explains Allegiance Heating and Air was incredibly reliable, professional and affordable. They arrived right on time, kept the work area clean and finished the furnace repair quickly. The technician explained everything clearly and the price was a great value. If happiness had a location on Google Maps, it would be here.
Gilbert had to go above and beyond because York is no longer making the part for my furnace. But he was able to find a way to construct a housing bracket for my furnace. Ingenuity, determination and integrity is what finally got my furnace fixed. Gilbert is truly a one of a kind technician.
Thank you for always going the extra mile. Gilbert is always respectful and helpful with any concerns.
"Great service, most knowledgeable and capable HVAC business in Kentuckiana!! Pete Flemming and Bryan the owner, are HVAC encyclopedias. They have the highest integrity of any HVAC business I have ever used. Allegiance has put numerous units in for me over the last 17 years. I will continue to use and trust them."
"Fast response from Allegiance when our heat was out on New Year’s day! Service technician was friendly and efficient. He took the time to explain the problem, tell us about the temporary fix and the plan for permanent repair. We were impressed!"
"Love Allegiance! Their technicians, in particular Benjamin, explain everything. Fast and thorough. A/C was out on a Sunday. Called Allegiance and within a few hours Benjamin arrived. Such a comfort as he was the one who last serviced our units. He quickly replaced part and cooling is restored!"
"My heat pump went out and I had to call after hours. The technician (Garrett) was outstanding and thorough. He got my system up and working until Monday and gave me several options of units. Also took the time to explain the issue to my Home warranty company. I highly recommend this company."
"Right on time :) respectful, fast, and polite. Even gave my fur babies some attention."
"Had Garrett out today to fix our AC. Fantastic tech. He showed up exactly when he said he would and kept us informed of what he was checking and what he found. Highly recommend!"
"Lucas with Allegiance showed up on time as promised, was professional and extremely patient and responsive with all my questions. He took care of the issue, and I feel he was trustworthy! He had us back to cool and comfortable on one of the hottest days of the year."
"Lucas did a great job! Very professional and expedient. Explained the process very well and represented Allegiance as a truly professional and reputable company."
"Arrived on time and work diligently to fix issue. These guy are great. Worked quickly to resolve my issues."
"Lucas was great - he spent a lot of time trying to figure out what was going on and explained everything he was doing. I trust Allegiance and wouldn’t want anyone else working on/in my house!!"
