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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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Featured Five-Star
Customer Reviews

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.

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.

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.

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 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.

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.
Joseph and Kwee showed up on time and were very polite. We promptly went to basement where the PVC pipe for my HVAC drainage had snapped in half. Joseph took a look and told me exactly how he was going to fix/replace the broken pipe. I was in a rush because I was on a client call when they arrived (my fault for not checking my calendar). As I ran upstairs, Joseph asked if I wanted to review pricing, which would have slipped my mind had he not stopped me. I’m very grateful he took the initiative to do that. I was surprised at the price of $225 as other companies had quoted me much higher prices. Once that was agreed upon, Joseph and Kwee got to work and were finished in about 20 minutes. The process was seamless and they were careful about being quiet as they were leaving to not disrupt my call. I will definitely be calling Oasis for my next plumbing job. Before and after pics attached. Thank you, guys!
Bill Nguyen
1 day ago
We have relied on Oasis for years, installing our furnace, maintaining our furnace and a/c, and cleaning our ducts. They are always professional and reliable.
Luis Quinones
4 days ago
Super responsive, great service. Everyone was incredibly nice throughout. Couldn’t ask for much more.
Wayne Duan
4 days ago
I've been using Oasis for my annual HVAC maintenance, as well as various HVAC and water heater repairs for the past ~5 years. They are consistently prompt, polite, and efficient. Every technician has been professional, reliable, and clear in their communication. Highly recommend!"
We had Oasis come out to identify a bathroom tub leak. The two guys were helpful, very friendly, and explained everything that was going on in great detail. They really educated us on what our issue was and identified the potential problems in a matter of minutes. Would def recommend.
Michelle Drake
5 days ago
Timely, professional and informative.
Kaitlin Meyer
5 days ago
Mark G was great. Highly recommend
Spencer Veltema
5 days ago
Oasis Heating and Cooling are definitely the people I recommend for HVAC situations. They’ll be honest with you about what’s going on and what your options are. They may not be the absolute cheapest option but you get what you pay for, and one visit from them compared to multiple visits from someone who is dirt cheap is going to be worth it in the long run.
Matty H
5 days ago
Joseph was very knowledgeable and professional. He explained the issue with my A/C and fixed it promptly, even tackling an unrelated request during the same visit.
Kelsey Rayford
1 week ago
Super detail oriented and fair pricing. Will use them every season!
Response from the owner:Thank you, Kelsey! We appreciate your kind words and are glad to hear you value our detail-oriented approach and fair pricing. Looking forward to serving you every season!
Melanie Makhija
1 week ago
Response from the owner:Thank you for your review, Melanie! We appreciate your support and look forward to serving you again.
Billie Morrow
1 week ago
On time, very professional, explained everything and cleaned up nicely when the job was completed
Response from the owner:Thank you, Billie! We appreciate your kind words about our professionalism and attention to detail. It's great to know you had a positive experience.
Courtney Kendal
1 week ago
Response from the owner:Thank you, Courtney, for taking the time to leave a review. We appreciate your support!
Technicians Joseph and Bill were really great! Punctual, friendly, explained everything in a way that was easy to understand. I highly recommend.
Response from the owner:Thank you, Colette! We're glad to hear that Joseph and Bill provided you with great service and made everything easy to understand. Your recommendation means a lot to us!
Rossy Jimenez
1 week ago
Response from the owner:Thank you, Rossy, for taking the time to leave a review. Your feedback is appreciated!
Vanessa Banks
1 week ago
Joseph did a great job. My AC unit is on its last leg. He explained in detail the problem and gave me an estimate of the approximate cost of a new unit installation.
Response from the owner:Thank you, Vanessa! We're glad to hear that Mark's efforts made a positive impact. Your feedback means a lot to us!
Deanna Charles
2 weeks ago
Response from the owner:Thank you, Deanna, for your review! We appreciate your support and look forward to serving you again.
searah deysach
2 weeks ago
We've used Oasis for years. They come when they say they will, the are friendly and they get the job done, usually very quickly !
Response from the owner:Thank you, Searah! We appreciate your loyalty and are glad to hear that our team consistently meets your expectations with friendly and efficient service.
Frank Bruno
2 weeks ago
Danny was professional and efficient. He identified the issue immediately. We have used Oasis for a very long time. We keep coming back. Always great!
Response from the owner:Thank you, Frank! We're glad to hear about your positive experience with Danny and appreciate your loyalty to Oasis. Looking forward to serving you again!
I have known Mike for over 25+ years. His crew has installed new heating and cooling systems for me, with vents and ductwork installation, hot water heaters and has serviced and maintained same over the years. They are reliable and always available when you need them. Recently, he replaced the heating and cooling system at my parent's house. He came out right away to assess and provide an estimate for the work and 3 days later my parents had their new system to initiate the winter season worry-free. His crew is punctual, very professional and very knowledgeable in their work. I recommend Oasis without reservation.
Response from the owner:Thank you, Leticia! We truly appreciate your kind words and loyalty over the years. It's great to hear that Mike and the team have consistently met your needs and those of your parents. Your recommendation means a lot to us!
Neela Persaud
2 weeks ago
We had a new AC and furnace replaced in our condo. The work was completed on a Monday. On Saturday morning, there was a lot of water coming down into the utility closet. We called in to the office immediately and since it was a holiday weekend, there was no availability until Tuesday morning. Saturday evening, as the dripping continued, it dripped into the pan the unit was sitting in, causing the safety switch to shut down the AC. We texted Naim, the estimator, who reached out to the GM. On Sunday morning, Mike and Alan came out to diagnose the problem. They found out that the new installation was not the problem. The water was coming from the condo unit above us. They went above and beyond by going to the unit and cleaning out the blocked pipe that was the source of the problem. This was done at no charge to us; pretty sure not yo the neighbors upstairs either. I would highly recommend Oasis.
Response from the owner:Thank you, Neela, for your wonderful review! We're glad to hear that Naim, Mike, and Alan were able to assist you promptly and go the extra mile to resolve the issue. Your recommendation means a lot to us!
Sarah Herweg
2 weeks ago
We had Joseph come out to do maintenance on a bad capacitor - he was very communicative, quick and anticipated what it was based on my description on the phone! Really appreciate the excellent service
Response from the owner:Thank you so much, Sarah! We truly appreciate your support and are glad you had a great experience. We're here for all of your HVAC and Plumbing needs!
Tony Werner
2 weeks ago
Joseph was great. Super helpful and totally clear. Would def use again.
Response from the owner:Thank you, Tony! We're glad to hear that Joseph was helpful and clear in assisting you. We look forward to serving you again!
michael parker
2 weeks ago
Easy to schedule and coordinate, service tech arrived on time and performed the necessary work in a timely matter, making only one recommendation for a minor component replacement in 12 months. Friendly and polite. I will use Oasis again next time need service or a system checkout!
Response from the owner:Thank you, Michael! We're glad to hear that scheduling was easy and that our service tech was friendly and efficient. We appreciate your trust in Oasis and look forward to assisting you again in the future!
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Use By
09/30/2026
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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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09/30/2026
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Lombard, IL