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Gas Water Heater Installation in Lombard, IL

When it comes to one of the most important appliances in your home, a properly installed gas water heater makes all the difference. Hot water touches nearly every part of daily life, from morning showers and dishwashing to laundry and sanitation. A correctly sized, properly vented, and safely connected gas water heater can quietly serve a household for a decade or more, while a poor installation can lead to inefficiency, costly repairs, and even serious safety hazards.

At Oasis Plumbing, Heating & Cooling, we have specialized in gas water heater installation for homeowners in Lombard, IL for many years. Our team understands the unique demands of residential plumbing and gas systems in this area, including local building codes, permit requirements, and the typical household needs of families throughout DuPage County. Since 1997, we have built our reputation on quality customer service, reliability, and technical expertise, and that commitment is reflected in every water heater we install.

Why Choose a Gas Water Heater?

Gas water heaters remain one of the most popular choices for homes in Chicago, IL and the surrounding areas for several compelling reasons. Natural gas heats water faster than electric units, which means a higher first-hour delivery rating and shorter recovery times between uses. For families with multiple bathrooms or back-to-back hot water demands, this performance advantage is significant.

Gas units also tend to cost less to operate over time, especially in markets where natural gas remains affordably priced compared to electricity. A standard gas water heater can deliver consistent hot water even during power outages when paired with a standing pilot, providing peace of mind during severe Illinois winters when storms occasionally knock out electrical service.

Modern gas water heaters also offer impressive efficiency ratings, with many models achieving energy factors that significantly reduce monthly utility costs. Power-vented and condensing models extract additional heat from combustion gases before they exit the home, squeezing more performance out of every cubic foot of natural gas consumed.

Our Installation Process

We approach every gas water heater installation in Lombard with a thorough, methodical process designed to ensure long-term performance and safety. Cutting corners on installation can lead to leaks, backdrafting, premature tank failure, and even carbon monoxide hazards, which is why we follow a comprehensive procedure on every job.

Our installation typically includes the following steps:

  • Initial assessment and sizing. We evaluate your household size, peak hot water demand, available space, existing gas line capacity, and venting configuration to recommend the right unit for your needs.
  • Permit acquisition and code compliance. We handle local permitting requirements and ensure the installation meets all applicable plumbing, gas, and mechanical codes.
  • Safe removal of the existing unit. The old tank is drained, disconnected from gas and water supplies, and hauled away for proper disposal or recycling.
  • Professional installation of the new heater. Connections are made with appropriate materials, expansion tanks are installed where required, and venting is verified for proper draft.
  • Testing and homeowner walkthrough. We test for gas leaks, verify proper combustion, check temperature settings, and explain operation and maintenance to you.

Choosing the Right Size and Model

One of the most common mistakes homeowners make is installing a water heater that is either too small or too large for their actual needs. An undersized unit constantly struggles to keep up with demand, leaving family members with cold showers. An oversized unit wastes energy keeping water hot that nobody uses, increasing your utility bills unnecessarily.

For a typical Lombard household, tank sizes generally range from 40 to 75 gallons, with 50-gallon units being among the most popular choices for families of three to five people. However, the right size depends on factors like the number of bathrooms, whether you have large soaking tubs, dishwasher and washing machine usage patterns, and whether you frequently host guests.

We also help homeowners decide between traditional tank-style heaters and tankless gas water heaters. Tankless models heat water on demand, eliminating standby losses and providing virtually unlimited hot water. They cost more upfront and may require gas line and venting upgrades, but they last longer and use less energy over their lifespan. Traditional tank units have lower initial costs and are simpler to install, making them an excellent choice for many households.

Safety Considerations for Gas Water Heaters

Gas appliances demand respect, and water heater installation is not a project that should be tackled by amateurs or unlicensed handymen. Improper gas connections can result in dangerous leaks, while incorrect venting can cause deadly carbon monoxide to accumulate inside your home. We take these risks seriously and never compromise on safety.

Our licensed technicians verify that combustion air is adequate, that vent pipes have proper slope and clearance from combustibles, that the temperature and pressure relief valve is correctly installed, and that the gas supply line is sized appropriately for the unit’s BTU input. We also test for gas leaks at every connection using approved leak detection methods before considering the job complete.

Drain pans, expansion tanks, sediment traps, and seismic strapping where applicable are all part of a code-compliant installation. These components may seem minor, but they protect your home from water damage, plumbing system stress, and other long-term issues that can develop with an inadequately installed water heater.

Serving Lombard and Surrounding Communities

Serving our customers in Chicago and the Northern Suburbs for over 20 years, Oasis Plumbing, Heating & Cooling has built lasting relationships with homeowners throughout the region. We also provide gas water heater installation and a full range of plumbing, heating, and cooling services in Chicago, Elmhurst, Bensenville, and Addison, IL, giving local families a single trusted resource for their home comfort needs.

Our highly trained technicians and responsive support staff offer customized solutions to fit your budget, whether you need an emergency replacement after an unexpected tank failure or want to proactively upgrade an aging unit before it becomes a problem. We carry quality brands, stand behind our workmanship, and treat every home with the respect it deserves.

Schedule Your Installation Today

If your current water heater is more than 10 years old, showing signs of rust at the base, producing rumbling noises, or simply failing to keep up with your family’s needs, it may be time for a replacement. Reach out to our team to discuss your options. We will assess your situation honestly, recommend the right unit for your household, and deliver an installation built to provide reliable hot water for years to come.

Gas Water Heater Installation in Lombard, IL

Gas Water Heater Installation in Lombard, IL

Gas Water Heater Installation ∴ Lombard, IL

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Family Owned and Operated Since 1997

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Featured Five-Star
Customer Reviews

Danny and the folks at Oasis got us a great deal on a new furnace and AC. The install took about 4 hours, and they were also super responsive throughout the process. It was about as good of an experience I’ve had with an HVAC company. I’d highly recommend!

Brian C.

Oasis is great! My furnace is almost 30 years old and for a reasonable price they were able to do the repairs. First Danny came to evaluate. He showed me what was wrong. They had to order the necessary parts to fix it. Today Hani and Fernando came to do the repair. They were efficient and courteous. I will definitely use Oasis in the future.

Emily H.

I had a great experience with Oasis. Our furnace had issues on Thursday night and Oasis came at 7am the next morning, and we found out we needed a new one. They provided all the necessary information to our condo building so we could get an emergency replacement on Saturday morning. Within 36 hours we had a brand new furnace and the installation team did a great job communicating on their work and how to use the furnace. The owner, Mike, and his team are great and I really appreciated the attention they gave to this matter. I would highly recommend and will only go to them in the future.

Shane H.

The folks with Oasis showed up right on time and replaced my entire furnace and condenser in about 4.5 hours. I had just redone my laundry room where the furnace is and they took great care not to damage anything. Overall very happy with the service and very happy with how respectful the installers were.

Josh D.

I have been using Oasis since 2019. They are reliable, efficient, and their prices are reasonable. The customer service is amazing. Every tech I’ve had come out is knowledgeable, friendly, and professional. The owner, Mike, is hands on and works with you every step of the way. Highly recommend Oasis.
Services include: furnace and AC replacement; annual maintenance.

Nicole U.

Oasis has always been great to work with and their staff are quick and efficient if issues arise. When our air conditioning broke down during the heat of the summer, they provided a quick replacement at a competitive price. Their staff are always extremely kind, respectful, and knowledgeable.

Sam C.

I called Oasis this morning because my furnace was not working. Within 20 minutes their technician, Danny, arrived. Danny was able to assess the situation, provide an immediate fix, and even commit to returning Monday morning to provide additional services needed. Danny was friendly, informative, professional and FAST! I am thankful I called Oasis for my immediate heating needs and that Danny was the technician who arrived. Top notch service! Highly recommend.

Megan R.

Oasis was incredibly responsive and efficient! My call to them on a Friday night during a cold spell was returned within 10 minutes and he scheduled a tech to come to my home at 7 the following morning. At 7 the tech was there, examined my furnace confirming that a new motor was necessary. He searched for the part, sent a quote and returned with the motor by noon the same day to install it. You can’t beat that!!! I will be using Oasis for all my future furnace and A/C needs.

Gayle V.
Stephanie Gretsch
13 hours ago
Andrew Hayworth
2 days ago
Katrina Ta
2 days ago
Mike responded quickly and luckily was nearby so came over pretty fast as well. He was off the clock but still came because I wouldn’t have heat on that cold winter night if my furnace didn’t get fixed. He also explained what went wrong and gave me some tips in case a similar situation occurs in the future. Was reasonably priced as he didn’t charge for the new fuse, overtime, etc. Will definitely use Oasis again for future HVAC needs! Oct 2026: Update - Oasis continues to be my HVAC company, they also do biannual HVAC maintenance for our mid-rise building, and is the company who provides services to all our residents. Naem is usually the person who comes for services and he’s very knowledgeable, helpful, and professional. Everyone who has been here were nothing short of polite and respectful. I will be using Oasis’ services indefinitely! Thank you to such a wonderful team!
Response from the owner:Thank you, Katrina, for your wonderful review! We're glad Mike was able to assist you quickly and provide valuable insights. Your support means a lot, and we look forward to helping you with your future HVAC needs!
Zainab Osman
3 days ago
Great and clean installation
Response from the owner:Thank you, Zainab, for your kind words about the installation! We're glad to hear you found it great and clean. Your feedback means a lot to us!
Ted Devlin
3 days ago
They have replaced both my original AC and furnace over the years and kept them in tip top shape. Workers are always on time for maintenance and the few issues I had with pressure switches in my Rheem furnace. Highly recommend.
Response from the owner:Thank you, Ted! We appreciate your trust in us for your AC and furnace needs and are glad to hear about your positive experiences with our team. Your recommendation means a lot to us!
Colleen Olsen
3 days ago
Very professional and efficient
Response from the owner:Thank you, Colleen! We appreciate your kind words about our professionalism and efficiency.
MJM Moore
4 days ago
Joseph was great. On time. Super nice. Serviced everything as asked!
Response from the owner:Thank you, Mjm! We're glad to hear that Joseph provided great service and met your expectations. We appreciate your feedback!
Jonathan
4 days ago
Fernando’s installation was very thorough and efficient. I had two hvacs replaced with new furnace and air conditioning. He went above and beyond to make sure all my zoned hvac system were calling properly since there were some issues with the dampers and control panel. Joseph came out a week later to top off the coolant since the AC wasn’t strong enough. Very professional and thorough. They are a top-notch team and would gladly use them again.
Response from the owner:Thank you, Jonathan, for your wonderful review! We're glad to hear that Fernando provided thorough and efficient installation and that Joseph followed up to ensure everything was working perfectly. We appreciate your support and look forward to serving you again!
Ben Salley
5 days ago
Very knowledgeable, nice, and super helpful. Got it fixed and explained what was wrong
Response from the owner:Thank you, Ben! We're glad to hear you found our service knowledgeable and helpful. It's great to know we could fix the issue and explain everything clearly.
Andrew Rojecki
5 days ago
Prompt, efficient, and knowledgeable.
Response from the owner:Thank you, Andrew! We appreciate your kind words about our team's promptness, efficiency, and knowledge.
Mary Taylor
5 days ago
Efficient and courteous service.
Response from the owner:Thank you, Mary, for your kind words about our efficient and courteous service. We appreciate your feedback!
Win Villamora
5 days ago
Did not actually fix the problem. Recommended getting a new furnace.
Response from the owner:Thank you for your feedback, Win. I'm sorry to hear that the issue wasn't resolved and appreciate you sharing your experience. If there's anything else we can assist you with, please let us know.
Kevin Murphy
5 days ago
Response from the owner:Thanks Kevin. We’re thrilled that you were satisfied with our services. Your feedback is appreciated, and we hope to be of help again soon!
Rachelle Rasich
5 days ago
Response from the owner:Thank you, Rachelle, for taking the time to leave a review. We appreciate your support!
Brad Herrmann
6 days ago
Very honest. They don't try to upsell you or charge you for things you don't need.
Response from the owner:Thank you, Brad! We appreciate your kind words and are glad to hear you value our honesty and straightforward approach.
Lucy Kaplan
6 days ago
Prompt and pleasant service. Highly recommend. 2026 Update: Just had my 20 tr old AC unit serviced by Joseph from Oasis. He was prompt and polite. He explained everything he was doing. Very happy with this company and strongly recommend them. My update for my fall service call is exactly the same as above except that he was able to come early and I was very happy to accommodate him! Excellent!
Response from the owner:Thank you so much for your business and feedback, Lucy! If any of your friends or family need help, please let them know about us!
Anna Kozlowski
6 days ago
Oasis team is professional and great to do business with. They are on time.
Response from the owner:Thank you, Anna, for your kind words about the Oasis team; we appreciate your support and are glad to hear you had a great experience with us!
A R
6 days ago
I have used Oasis once for HVAC maintenance and twice for plumbing issues. Each appointment has been a pleasant experience. The HVAC technician and plumbers have all been courteous and performed good work, and clearly explained the work done.
Response from the owner:Thank you for sharing your positive experiences with us, A! We're glad to hear that our HVAC technician and plumbers provided courteous service and clear explanations. Your support means a lot to our team!
Kent Brooks
7 days ago
Well mannered, professional, provided clearly.
Dan J
1 week ago
Worked with Joseph for some standard maintenance to our AC and Furnace. Very professional and honest, didn’t push to upsell anything but gave good recommendations.
Katie Reese
1 week ago
Joseph did a great job of looking at the system in my new home. He went through how the it is running and any concerns I have. He took the time to ensure I understood everything. Highly recommend!
Becky Kaplan
1 week ago
Professional and courteous service at a reasonable price.
Response from the owner:Thank you, Becky, for your kind words about our professional and courteous service; we appreciate your feedback!
Gregory Surber
1 week ago
We are very happy with choosing Oasis for our hvac seasonal maintenance and service. Service techs Fernando and Naem are very pleasant and thorough. We highly recommend Oasis.
Response from the owner:Thank you, Gregory, for your kind words and recommendation; we're glad to hear you had a great experience with Naem!
Ben Piper
1 week ago
Quy was extremely thorough and professional.
Response from the owner:Thank you, Ben! We appreciate your kind words about Quy and are glad to hear you had a great experience.
Response from the owner:Thank you, William, for taking the time to leave a review. We appreciate your feedback and are here to help if you have any further thoughts to share!
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Use By
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Same-day and next-day installation subject to equipment availability and scheduling. Not all systems or installations qualify. Additional charges may apply. Residential customers only.

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Lombard, IL