day and knight air conditioning and heating Hero

day and knight air conditioning and heating Hero 3

day and knight air conditioning and heating Hero 2

Request Your Free Estimate Now

Reliable Comfort, Year-Round HVAC Care

Quality HVAC installation, repairs, and maintenance done right the first time to keep your home comfortable year-round.

Book HVAC Service Now

5.00/5.00

Over 97 Happy Customers!

Get Top-Tier HVAC Services in Slidell, LA, and the Nearby Areas

Name: Day and Knight Air Conditioning and Heating, LLC
Address: Slidell LA 70461, Slidell, LA, 70461, US
Telephone: (985) 290-6433

Dealing with unreliable HVAC services can be stressful. At Day and Knight Air Conditioning and Heating, LLC, we specialize in resolving HVAC issues for homeowners in Slidell, LA, and the nearby areas. With over 20 years of experience, we bring confidence, accuracy, and reliability to every job.

Slidell, LA
(985) 290-6433 (504) 416-9352

Quality HVAC Services Backed by Experience

Our team is made up of seasoned HVAC service technicians with decades of combined experience. Each member brings unique skills, from HVAC installation expertise to precise repair work, allowing us to tackle jobs of any size with confidence.

We approach every project with professionalism, ensuring technical accuracy and reliable service. By working closely with homeowners, we deliver personalized solutions that fit their needs and budget. Collaboration, respect, and responsiveness are at the heart of how we work, and that’s why families trust us to keep their homes comfortable all year long.

When you choose us, you get dependable solutions that restore your comfort and eliminate HVAC worries for good.

See What We Do

day and knight air conditioning and heating a

Get Free Estimates on All HVAC Installations Today

Start Your Project With Confidence

Call Now

Your Reliable Choice for HVAC Care

Choosing the right HVAC company makes all the difference in how well your home stays comfortable. Many homeowners struggle with service technicians who overpromise and underdeliver, leaving them with incomplete work or constant breakdowns. We set ourselves apart with over 20 years of proven experience, handling everything from routine maintenance to complex installations with accuracy and care.

Our team is trained to manage large-scale projects, but we apply the same thoroughness to every job, big or small. We take time to understand your home’s needs, size your system correctly, and ensure safety standards are always met.

Reliability is at the core of what we do, which means we respond quickly to urgent requests and keep flexible scheduling to fit your life. Every project is owner-led, giving you the confidence that your job is done right the first time.

We also believe in clear communication, showing you exactly what we’re doing and why, so you always know your options. From free estimates to ongoing maintenance, we make sure your investment in comfort pays off long-term. Our goal is to deliver dependable HVAC services that keep your home running efficiently while giving you lasting value. When you hire us, you’re not just getting a service technician; you’re getting a partner who truly cares about your comfort.

Get Fast HVAC Help

day and knight air conditioning and heating b

Take the Next Step Toward Reliable HVAC Comfort Today

Your comfort should never be an afterthought, and that’s why we make it simple to get the HVAC services you need in Slidell, LA. Whether you’re dealing with an outdated unit, a sudden breakdown, or you’re ready to upgrade to a new installation, we’re here to help. Our team provides clear guidance, honest recommendations, and skilled service to ensure your system is safe, efficient, and reliable.

With free estimates and flexible scheduling, getting started has never been easier. We know how important it is to keep your home comfortable in Louisiana’s climate, and we work with urgency and precision to deliver the results you expect. Every project we take on is built around reliability, respect, and your long-term comfort. Don’t wait until a small issue becomes a major repair. Reach out to us today and discover the difference a trusted HVAC partner can make.

Call now to schedule your free estimate and take control of your home comfort with dependable service you can rely on.

Schedule Your HVAC Service

day and knight air conditioning and heating c

Complete HVAC Care for Your Home

From HVAC installation and AC replacement to thermostat upgrades, repairs, and maintenance, we deliver reliable solutions tailored to your home. We ensure every system is installed, serviced, and repaired with accuracy and care.

HVAC Installation

Choose our trusted HVAC installation service for reliable comfort and long-lasting performance. We handle every detail from system selection to testing for efficiency.

AC Replacement

Upgrade your cooling system with our AC replacement service for improved efficiency and comfort. We remove old units and install modern systems built to last.

Thermostat Installation & Replacement

Improve climate control with our AC thermostat replacement service tailored to your needs. From smart upgrades to manual models, we ensure proper installation and testing.

General Maintenance

Keep your system running efficiently with our HVAC inspection services designed to prevent costly breakdowns. Regular care extends equipment lifespan and improves performance.

HVAC Repairs

Restore comfort quickly with our HVAC repair services for all major systems. We diagnose issues, complete repairs, and ensure your unit operates reliably.

What Our Customers Say

Talon T.

07/31/2025

Darryl was prompt with responding to my request for a tech to come out, and was flexible to work around my unusual work schedule as a photographer (who often gets last minute bookings or cancellations). He came over and figured out the issues and gave me options that fit my situation both financially and realistically based on my home size and layout. He and his team were able to come and replace the outside unit and attic HVAC system completely in just a few hours, which was great as my AC unit went out at the start of summer heat. Darryl was easy to talk to and was very knowledgable and willing to answer any questions I had about the system, process, or operation. Overall I’m extremely happy with the experience and I’m still enjoying the system 3 months later. Thank you Darryl and the Day and Knight team!

Thumbtack

Aynsley C.

07/19/2025

Day and Knight A/C repair was a pleasure to work with! I wasn’t able to meet Daryl during the week and he accommodated me on a Saturday morning. He quickly diagnosed and fixed my A/C issue at a very fair price. I appreciate his responsive and will definitely continue to use him for routine maintenance.

Thumbtack

Ian N.

07/16/2025

I was distraught about my air conditioning not blowing cool air in July in Nola. I sent a message in the night, not expecting to hear back until the next day. Darryl responded THAT NIGHT to schedule a visit to my house the first thing the next morning. THAT’s professional service.

Thumbtack

Jiovianti Y.

07/13/2025

My AC went out at 9pm. I post the repair request and he was at my home 645am the next morning. If you need someone to come and fix your AC right away you should hire him.

Thumbtack

Christine P.

06/21/2025

Daryl was awesome my AC was repaired with 2 hours of notifying Thumbtack of Need. Daryl didn’t try to hard sell of unnecessary AC components. Thank You Daryl for your prompness and Professionalism

Thumbtack

Yasmine B.

06/16/2025

Very knowledgeable and professional!

Thumbtack

David P.

Darrel was great very personable professional and flexible

HomeAdvisor

Geoff H.

Daryl was knowledgeable and professional. He answered every question I had from the cause through the completed repair. I appreciate being seen on short notice!

HomeAdvisor

Charles T.

Very knowledgeable and professional. Had a very large job done at my home that included two 6 tons and a 3 ton unit for the shop!! very impressive turnaround and value for your money everything working great would definitely recommend..!!

HomeAdvisor

Anya R.

They were very thorough and professional! Definitely will continue to use this company for all of my AC and heating needs!

HomeAdvisor

Anika J.

Mr. Knight was extremely kind and patient with helping me. His professionalism & knowledge of his craft is one of a kind.

HomeAdvisor

Arthur S.

Only thing I can say about this company they came through. Assess what they needed. And the next thing you know, in a couple hours. We had air. nice and friendly work crew Highly recommended I guarantee they won't let you down

HomeAdvisor

Malcolm B.

I had an outstanding experience with Day and Knight Air Conditioning and Heating LLC. From the moment I contacted them for a quote to the completion of the installation, their service was exceptional. The technicians were not only skilled but also very professional, ensuring that the AC and heating units were installed efficiently. The team answered all my questions and provided helpful insights on maintaining the systems. I appreciate their dedication to customer satisfaction and would highly recommend Day and Knight to anyone in need of HVAC services. Thanks for keeping my home comfortable all year round!"

HomeAdvisor

Quenna J.

I would Highly recommend This company for all Air Conditioning and heating services. They came out on the same day, and repair my unit . The price was affordable and they offer payment plans.

HomeAdvisor

Mary Taylor

My neighbor and I both used Darryl to replace our roof and interior units. We were both really pleased. He came.back to fix a wire that had been damaged by our roofer months later. Responsive and hard working guys who managed their way around our 200 year old house.

Google Reviews

Service Areas

View our service map to see the areas we serve within a 50-mile radius of Slidell, LA.

Abita Springs, LA
Alton, LA
Bush, LA
Covington, LA
Eden Isle, LA
Folsom, LA
Hickory, LA
Lacombe, LA
Madisonville, LA
Mandeville, LA
Maurepas, LA
Pearl River, LA
Robert, LA
Slidell, LA
Sun, LA
Talisheek, LA

Connect With Us for Trusted HVAC Services

Headquarters

Slidell, LA

Phone

(985) 290-6433 (504) 416-9352

We Are on Social

Schedule Your HVAC Service Now

Complete the form below to schedule HVAC installation, replacement, maintenance, or repairs. Our team will respond quickly to confirm details and get your service underway.