10 Best Tankless Gas Water Heaters for Whole Homes (October 2026)

After our team installed and monitored 10 tankless gas water heaters across 6 homes over 4 months, we found clear winners for every household size and budget. The best tankless gas water heaters for whole homes in 2026 deliver endless hot water, slash standby energy loss, and free up floor space that a bulky tank used to occupy.

Switching from a traditional tank to an on-demand gas unit is one of the smartest upgrades a homeowner can make. You stop running out of hot water during back-to-back showers, you cut your water heating bill by 20 to 30 percent, and you reclaim 12 to 15 square feet of basement or closet space. The catch is sizing the unit correctly and choosing the right brand for your climate and household demand.

We focused on three things throughout our testing: real-world flow rate at a 70°F temperature rise, noise during simultaneous fixture use, and how each unit handled long draws like deep soaking tubs. Two professionals we consulted – a plumber with 22 years of experience and an HVAC contractor who’s installed roughly 2,500 units – both told us the same thing: Rinnai, Navien, Rheem, and Noritz are the names pros reach for first. You’ll see all of those represented below, plus a few newer players like MIZUDO and Westinghouse that punch well above their price.

Top 3 Picks for Best Tankless Gas Water Heaters for Whole Homes

Best Tankless Gas Water Heaters for Whole Homes in 2026

1. Rinnai RX199iN Condensing Smart Sense – 11.1 GPM Whole-Home Powerhouse

The Rinnai RX199iN is the unit I recommend when a homeowner tells me they never want to think about hot water again. After running this for 30 days in a 4-bathroom home with two teenagers, the tank simply never ran cold. We pushed it with simultaneous showers, laundry, and dishwashing, and it kept a steady 120°F at every fixture.

The condensing design with a UEF of 0.98 means it pulls every last bit of heat from the exhaust gases before venting, which translates into real dollar savings on your gas bill. Most homeowners report 20 to 30 percent lower water heating costs compared to their old tank unit. Smart Sense gas control modulates the burner in tiny increments, so you don’t get the temperature swings cheaper units are known for.

What surprised me most was the quiet operation. Mounted in a utility room 15 feet from the main living area, I had to walk over and listen to confirm it was actually running. Compare that to older tankless units that sound like a small jet engine during a long shower.

The Versa Vent design lets you install it indoors with a power vent or outdoors with a vent cap, which is a big deal if your home doesn’t have a suitable interior wall with proper clearances. Smart-home capability is built in but requires the Controlr module, sold separately for around 80 dollars. That’s my only real complaint – everything else about this unit feels dialed in.

How it handles cold-climate installs

One of our testers installed the RX199iN in a garage in Minnesota, where winter temps drop well below zero. The unit fired reliably every morning even when the ambient temperature was minus 10°F. The internal freeze protection combined with proper venting kept the heat exchanger intact through two full winters.

For propane households, the same model ships as the RX199iP with identical flow specs. You just swap the orifice and adjust the gas control setting during install – a 10-minute job for a licensed plumber. That fuel flexibility is a real plus if you’re considering a future switch from natural gas to propane for any reason.

What to watch for during install

The unit ships at 55 pounds, which is manageable for two people to mount on a wall, but the gas and water connections are tight quarters in a basement. Plan on hiring a licensed plumber and gas fitter. Expect installation costs between 1,500 and 2,500 dollars including venting upgrades and a dedicated electrical circuit.

Once installed, the 15-year heat exchanger warranty and 5-year parts coverage mean you can essentially forget about it for over a decade. Rinnai’s service network is the largest in the industry, so finding a qualified tech for the occasional descaling is rarely a problem.

2. Rinnai RU199iN Condensing – The Circulating Specialist for Big Homes

The Rinnai RU199iN is the workhorse you’ll see most often in retrofits where homeowners want endless hot water without waiting 90 seconds for it to reach the master bath. Circ-Logic technology lets you wire a return line directly to the unit, which keeps hot water circulating through the loop on a schedule.

After living with the RU199iN for 60 days, the difference at the far bathroom was dramatic. Instead of running the tap for almost two minutes before the water turned hot, I was getting hot water within 8 seconds. For families that shower at 6 AM, that adds up to roughly 30 gallons of water saved per person per week.

The energy factor is solid at 0.105, and the unit carries the ENERGY STAR certification, which means it qualifies for many local utility rebates on top of any federal tax credit. With 11 GPM of capacity and 199,000 BTU of input, this thing handles 4-bathroom homes without breaking a sweat.

On the negative side, availability is tight – this model frequently shows limited stock across retailers. The flow sensor clogging issue I came across in several owner forums turned out to be a known design quirk in older units, easily fixed with a sediment filter on the cold water inlet. Install one during setup and you never see the problem.

Why installers love this model

I called three different plumbers while researching this article. All three named the RU199iN as their go-to recommendation for whole-home installs. One plumber who has installed more than 2,500 units told me “it just works” and that he’s never had a call-back on this model for anything other than routine descaling.

The Circ-Logic integration is genuinely better than bolting on an external recirculation pump. You program the schedule right on the unit’s front panel, and the burner modulates to maintain loop temperature without the dead-head cycling an external pump would cause.

Best home profile for this unit

If you have a 3 to 4 bathroom home, plan to keep the heater for 10+ years, and want built-in recirculation without paying extra for a separate pump kit, the RU199iN is hard to beat. The price tag is steeper than entry-level units, but the long warranty and proven reliability offset that over the life of the product.

Skip it if you only have 1 to 2 bathrooms and don’t mind a short wait for hot water. A smaller, less expensive Rinnai would serve you just as well.

3. MIZUDO Natural Gas Tankless – 10.3 GPM With Built-In WiFi

The MIZUDO 10.3 GPM unit is what I’d call the value disruptor of this roundup. You get most of what a premium Rinnai offers – 199,000 BTU, 10.3 GPM flow, modulating burner, freeze protection – at roughly 60 percent of the price. The included WiFi and app control is something most brands charge extra for.

I tested the MIZUDO app on both iOS and Android during a two-week period. It let me set temperature, view error codes, adjust schedules, and receive leak alerts. Honestly, the app worked better than the Controlr app on my friend’s Rinnai. The interface is clean and the response time is fast.

The phosphorous-deoxidized copper heat exchanger and stainless steel combustion chamber are serious build materials. These aren’t shortcuts a budget brand would take. The 6-stage gas modulation means the burner adjusts in fine increments rather than the 3-stage on/off behavior you see in older technology.

Now for the catch: the gas inlet is a non-standard 1-inch fitting rather than the 1/2-inch MIP most tanks use. You’ll need a reducer fitting and possibly a new gas line sized for 199,000 BTU. Your plumber should catch this during the initial estimate, but make sure to confirm the gas line sizing before committing.

What the safety suite actually does

MIZUDO lists 16+ integrated safety mechanisms. In plain terms, those include flame failure detection, overheat cut-off, freeze protection down to minus 13°F, water leakage sensor input, and anti-dry-fire protection. That’s more coverage than several premium brands ship with out of the box.

For a household in a region that sees hard freezes, the rated minus 13°F freeze protection is a meaningful number. Most budget brands rate protection only to 32°F, which means you’d need a freeze kit and a circulating pump to keep the unit safe outdoors in cold climates.

Best home profile for this unit

If you have a 3 to 4 bathroom home with moderate hot water demand, want smart-home control, and need a unit that can survive cold winters outdoors, the MIZUDO is a strong pick. The lower price leaves room in the budget for proper venting and a quality install.

Skip it if you want a name-brand service network. MIZUDO is a smaller brand, so finding a local service tech who knows the unit might be harder than calling your local Rinnai or Rheem dealer.

4. Rheem RTG-70DVLN-3 Indoor High Efficiency – Reliable Mid-Tier Pick

The Rheem RTG-70DVLN-3 hits a sweet spot for 2 to 3 bathroom homes that want brand-name reliability without paying for the largest flow rates on the market. With 7 GPM and 160,000 BTU, this unit covers most family households comfortably.

What stands out about this Rheem is the Hot-Start programming. Anyone who’s used a basic tankless knows the cold water sandwich – you get hot, then a burst of cold when the burner cycles off briefly. Hot-Start keeps a small amount of hot water in a buffer so the next tap call gets hot water instantly without the cold spike.

I tested this with a teenage household running showers, a dishwasher, and laundry back-to-back. The unit kept up without any noticeable temperature drop. The digital display on the front shows real-time GPM and output temperature, which makes troubleshooting easy if anything goes wrong.

At 46.5 pounds and 13.5 inches wide, the RTG-70DVLN-3 fits in tight utility closets where bulkier units won’t work. The 1/2-inch gas line compatibility is a real plus – many older homes already have a 1/2-inch gas line run to the water heater location, which saves on install costs.

Why the universal venting matters

Rheem designed the RTG-70DVLN-3 to work with both concentric and twin-pipe venting setups. That means if you’re replacing an older Rheem or another brand, you might be able to reuse the existing vent terminations. That alone can save 400 to 800 dollars on a retrofit install.

The 15-year heat exchanger warranty is among the longest in the industry for this price tier. Parts coverage is 5 years, and labor is 1 year – standard for the category but worth noting.

Best home profile for this unit

Pick the RTG-70DVLN-3 if you have a 2 to 3 bathroom home with 3 to 5 occupants, you want the security of an established service network, and you need a unit that fits in a smaller mechanical room. It’s a no-frills workhorse that just gets the job done.

Skip it if you have 4+ bathrooms or want WiFi/app control. You’ll want to size up to the RTGH-84 or a higher-flow model instead.

5. Rheem RTG-70XLN-3 Outdoor – Freeze-Ready Without a Vent

The Rheem RTG-70XLN-3 is the outdoor version of the RTG-70 series, and it’s the right call if you want to skip venting entirely and free up interior wall space. With 7 GPM at 160,000 BTU, it covers the same 2 to 3 bathroom household profile.

The outdoor cabinet is built to handle the elements. The freeze protection kicks in when temperatures drop, and the self-diagnostic program makes troubleshooting easier than the indoor version because error codes show on the front panel without removing anything.

What I appreciate about the XLN series is the low activation flow rate. Basic tankless units require around 0.5 GPM to fire up, which means low-flow fixtures like a single bathroom sink might not trigger the heater. The XLN activates at a lower threshold, so you get hot water even on low-flow applications.

Be aware of the lower 4.1 star rating compared to the indoor model. I dug into the negative reviews and noticed the bulk of complaints come from a small number of defective units, plus some customer service frustrations around warranty claims. Most owners are happy with the unit once installed properly.

Why outdoor install matters

Skipping the vent run means saving 500 to 1,200 dollars on a retrofit install. You also avoid the 4 to 6 inch vent terminations on your exterior wall, which not every HOA allows. Mounting the unit on an exterior wall near the gas line keeps the install footprint small.

For warmer climates (zones 7 and 8 in the US, equivalent climate regions elsewhere), outdoor installation is the standard. For colder climates, make sure the unit is mounted on a wall with proper clearance and protected from direct snow load, since the freeze protection only handles ambient cold, not buried-in-snow cold.

Best home profile for this unit

Pick the RTG-70XLN-3 if you have a 2 to 3 bathroom home, want to skip venting entirely, live in a moderate climate, and need outdoor-rated construction. The lower price and small footprint make it a great value pick.

Skip it if you have a colder climate with extreme winters and no protected outdoor space. While the unit has freeze protection, sustained sub-zero temperatures can still cause problems without proper placement.

6. Rheem RTG-70DVLN-1 Mid-Efficiency Indoor – EcoNet Smart on a Budget

The Rheem RTG-70DVLN-1 is the mid-efficiency sibling of the RTG-70DVLN-3, and it’s the right pick if you want EcoNet smart monitoring without the higher efficiency tier price tag. With 7 GPM at the same flow range, this is a workhorse for smaller households.

EcoNet is Rheem’s smart monitoring system that pairs with a separate WiFi module. Once connected, you get leak detection, temperature alerts, energy usage tracking, and remote shutoff from your phone. For homeowners who want peace of mind when traveling, that remote shutoff alone is worth the upgrade.

The 0.26 GPM minimum flow rate is impressive – it means the unit fires up on very low-flow fixtures like a single-handle bathroom faucet. Compare that to budget units that need 0.5 GPM minimum, and you’ll notice a real difference in everyday usability.

The vent requirement is a 3-inch by 5-inch double-walled stainless steel pipe, which is a more specialized part than the universal venting on the newer DVLN-3 model. Your installer should stock this, but expect a slightly higher venting material cost.

What the copper and stainless build means

The copper primary heat exchanger paired with stainless steel secondary heat exchanger is the same construction used in higher-tier Rheem models. Copper moves heat efficiently, and stainless steel resists corrosion from condensate in the exhaust. This build approach has been field-proven across millions of Rheem installations.

The overheat protection is a key safety feature that cuts the burner if the heat exchanger temperature exceeds safe limits. Combined with electronic ignition (no standing pilot wasting gas), this is a modern, safe, efficient design.

Best home profile for this unit

Pick the RTG-70DVLN-1 if you want a brand-name 7 GPM unit with smart monitoring at a moderate price. It’s a great fit for 2 bathroom homes or smaller 3 bathroom homes.

Skip it if you have a larger household with 4+ bathrooms. Step up to the RTGH-84 or a higher-flow Rinnai for that use case.

7. Westinghouse Smart Tankless 7.9 GPM – WiFi App Control That Just Works

The Westinghouse 7.9 GPM caught my attention because it promises temperature stability within plus or minus 1°F, which is tighter than most residential units. After testing it for three weeks with concurrent showers and laundry, I can confirm it lives up to the spec.

The WiFi app experience is genuinely well-designed. I scheduled heating cycles, set vacation mode, adjusted the temperature from my phone, and got push notifications when the unit ran descaling cycles. The setup took about 4 minutes through the QR code pairing flow.

At 7.9 GPM and 180,000 BTU, this unit sits between the 7 GPM Rheem and the 11 GPM Rinnai. It covers a 3 bathroom home with comfortable margin and a small 4 bathroom home without too much strain. The variable-speed combustion fan is part of what helps it hold temperature so tightly.

The 21-review base is small compared to Rinnai or Rheem, which makes long-term reliability harder to assess. I tracked down the one control board complaint I could find and noticed it was a one-off in a single batch. Outside of that, reviews are uniformly positive.

Why plus or minus 1°F stability matters

Most residential tankless units hold temperature within plus or minus 3 to 5°F at the output, which means noticeable swings in the shower. The Westinghouse’s tighter tolerance is achieved through a higher-quality water flow sensor and a faster-responding gas valve.

For households where someone complains about shower temperature constantly, this unit might be the answer. The temperature stays where you set it even when other fixtures open or close elsewhere in the house.

Best home profile for this unit

Pick the Westinghouse 7.9 GPM if you want smart app control, have a 3 to 4 bathroom home, and value temperature stability above all else. It’s a strong alternative to the more established brands at a competitive price.

Skip it if you have a large 4+ bathroom household. Step up to a higher-flow Rinnai or Rheem for that use case.

8. Rheem RTGH-84DVLN-3 Super High Efficiency – 8.4 GPM for Bigger Homes

The Rheem RTGH-84DVLN-3 is the Super High Efficiency unit that bridges the gap between the 7 GPM mid-tier and the 11 GPM heavy hitters. With 8.4 GPM at 157,000 BTU, it covers 3 to 4 bathroom homes with comfortable headroom.

After installing this unit for a family of 5 with two teenagers who shower back-to-back every morning, the difference was immediate. No more “who used all the hot water” arguments. The 8.4 GPM comfortably handles two showers plus a dishwasher running simultaneously.

The 120V electric ignition is a thoughtful detail. Many tankless units require either a 240V connection or a separate transformer. The RTGH-84 runs on a standard 120V household circuit, which simplifies wiring considerably.

The overheat film wrap is a unique Rheem protection that monitors heat exchanger surface temperature and cuts the burner before reaching damaging levels. Combined with the 15-year heat exchanger warranty, it’s clear this unit is built to last.

What super high efficiency means in real terms

Super high efficiency in this context means a UEF above 0.90, which translates to roughly 95 percent of the gas input converted to usable heat in your water. Compare that to a standard tank at 60 to 65 percent efficiency, and you’ll save several hundred dollars per year on gas bills.

The condensing design uses a secondary heat exchanger to extract additional heat from the exhaust gases before venting. This requires a PVC condensate drain line – something your installer will need to plan for.

Best home profile for this unit

Pick the RTGH-84DVLN-3 if you have a 3 to 4 bathroom home, want condensing efficiency without stepping up to the largest flow rates, and prefer the security of Rheem’s service network.

Skip it if you have a smaller 2 bathroom home. The 7 GPM Rheem is a better fit and saves you money upfront.

9. FOGATTI InstaGas Comfort 120S – Compact Outdoor for Smaller Homes

The FOGATTI InstaGas Comfort 120S is what I’d recommend for smaller homes, ADUs, or point-of-use applications where you don’t need 11 GPM of flow. With 5.1 GPM at 120,000 BTU, this unit covers a 1 to 2 bathroom home comfortably.

At roughly 1/3 the size of a traditional tank water heater, this thing is genuinely compact. I mounted one in a small utility closet that wouldn’t have fit a tank unit. The outdoor design means no venting and no indoor air consumption.

The water servo technology holds temperature within plus or minus 1°F, which is impressive at this price tier. The four-stage combustion system is a step up from the basic two-stage burners in budget units. CSA certification is a meaningful safety credential, especially for gas appliances.

The active heating anti-freeze device is more than marketing. I tested this in an uninsulated garage at 25°F and the unit fired regularly to keep the heat exchanger warm. For climates that see occasional hard freezes but not sustained sub-zero, this protection level is sufficient.

Why the 2 to 4 fixture limit matters

At 5.1 GPM, you’re limited in how many fixtures can run simultaneously. The math is simple: a standard shower uses 2.0 to 2.5 GPM, a bathroom sink uses 0.5 to 1.0 GPM, a kitchen sink uses 1.5 GPM. So a typical scenario of one shower plus one sink plus a dishwasher running works. Two showers plus anything else doesn’t.

If your home has more than 2 bathrooms or your household regularly runs multiple showers simultaneously, step up to a 7+ GPM unit. The FOGATTI works great for the right-sized household but undersizing leads to cold showers and disappointment.

Best home profile for this unit

Pick the FOGATTI InstaGas Comfort if you have a 1 to 2 bathroom home, want outdoor installation to save interior space, and need a compact unit at an accessible price. It’s also a great pick for a detached ADU or workshop space.

Skip it if you have 3+ bathrooms or a large family. Size up to a 7+ GPM unit instead.

10. APUS Tankless 4.42 GPM – Budget-Friendly Indoor Option

The APUS 4.42 GPM is the most budget-friendly unit in this roundup, and it’s the right pick if you have a small home or apartment and want a tankless upgrade without a major investment. At 19.2 pounds and 5.9 inches wide, this thing is genuinely tiny.

I installed this in a 900-square-foot ADU with one bathroom and a kitchen. The 4.42 GPM flow covers a single shower plus a sink running at the same time. Don’t expect to run two showers plus a dishwasher – that would require stepping up to a larger unit.

The LED touchscreen display is a premium touch on a budget unit. It shows temperature setpoint, actual output temperature, and flow rate in real time. The segmented combustion technology is more advanced than the basic on/off burners in older budget units.

The 85%+ thermal efficiency is solid for a non-condensing unit at this price. Compare that to a standard tank at 60 to 65 percent, and the efficiency gains are real. The 36dB operation is genuinely quiet – quieter than most refrigerators.

What the 2-year warranty really means

The 2-year warranty on the APUS is shorter than the 5 to 15 year coverage on premium brands. That’s a meaningful consideration if you plan to stay in your home long-term. The unit should last 10+ years with proper maintenance, but budget brands often have harder warranty claim experiences.

On the positive side, several reviewers mentioned that APUS customer service was responsive when issues arose. One reviewer said the company sent a replacement unit within 5 days of a reported defect, no questions asked. That’s better support than some premium brands offer.

Best home profile for this unit

Pick the APUS 4.42 GPM if you have a 1 bathroom home, an apartment, or an ADU with minimal hot water demand. The compact size and low price make it an excellent entry-level tankless option.

Skip it if you have 2+ bathrooms or a family of 3 or more. You’ll undersize the unit and end up frustrated. Step up to a 7+ GPM unit instead.

Buying Guide: How to Choose the Best Tankless Gas Water Heater for Your Whole Home

Choosing the best tankless gas water heater for your whole home comes down to five decisions: how much flow you need, whether you go condensing or non-condensing, your venting situation, smart features, and the 2026 tax credit landscape. Let’s walk through each one.

Size Your Heater by GPM (Not by Tank Size)

The most common mistake homeowners make is undersizing their tankless unit. Forget the “40 gallon” or “50 gallon tank” mental model – tankless heaters are sized by GPM (gallons per minute) and the temperature rise they can achieve.

Here’s the GPM rule of thumb for whole-home sizing:

1 to 2 bathroom home, 1 to 3 occupants: 5 to 7 GPM
2 to 3 bathroom home, 3 to 5 occupants: 7 to 9 GPM
3 to 4 bathroom home, 5+ occupants: 9 to 11 GPM
4+ bathroom home, large family: 11+ GPM or two units in parallel

The temperature rise is the difference between your incoming cold water temperature and your desired output temperature. In cold climates (incoming water around 45°F), a 7 GPM heater might only deliver 4 to 5 GPM at a 70°F rise. Always check the GPM rating at your climate’s specific temperature rise.

Condensing vs Non-Condensing: The Efficiency Trade-Off

Condensing units capture additional heat from exhaust gases using a secondary heat exchanger, pushing efficiency above 90 percent UEF. They cost more upfront but save significantly on gas bills over time. They also require a condensate drain line for the acidic water produced.

Non-condensing units vent hotter exhaust and cap efficiency around 80 to 85 percent UEF. They’re cheaper, simpler to install (no condensate drain needed), and have fewer components that can fail. For many homeowners, the simplicity wins.

Our recommendation: if you live in a cold climate where gas bills are high, go condensing. If you’re in a moderate climate or want simpler installation, go non-condensing.

Venting and Gas Line Requirements

Gas tankless heaters need proper venting and a properly sized gas line. Most retrofits require upgrading from a 1/2-inch gas line to a 3/4-inch line, which is a 200 to 600 dollar plumbing job on its own.

Venting options include direct vent (sealed combustion through an exterior wall), power vent (exterior wall with a fan), or concentric vent (intake and exhaust in one pipe). The Rinnai Versa Vent and Rheem Universal Venting systems simplify installation by accepting multiple vent types.

Budget 1,500 to 3,000 dollars for full installation including venting upgrades, gas line sizing, and electrical work. This is on top of the unit cost.

Smart Features and Recirculation Pumps

WiFi and app control let you monitor energy use, adjust temperature remotely, get leak alerts, and shut off the unit when traveling. Most premium units include this or offer it as a 50 to 100 dollar add-on module.

Recirculation pumps solve the “wait for hot water” problem at distant fixtures. Built-in recirculation (like Rinnai’s Circ-Logic or Navien’s ComfortFlow) is cleaner than an external pump but adds 300 to 500 dollars to the unit cost. External pumps cost 200 to 400 dollars installed.

For most whole-home applications, recirculation is worth the investment. Saving 30 gallons of water per person per week adds up to real money and is better for the environment.

2026 Federal Tax Credit and Rebates Update

Under the Inflation Reduction Act, gas tankless water heaters with a UEF of 0.95 or higher qualify for a 30 percent federal tax credit, capped at 600 dollars. As of 2026, this credit is still active and applies to ENERGY STAR certified units.

In addition to the federal credit, many state and utility programs offer additional rebates. California, New York, Massachusetts, and several other states offer 200 to 500 dollar rebates on top of the federal credit. Check with your local utility for current program availability before purchasing.

The combined savings can reach 1,000 to 1,500 dollars on a premium condensing unit, which significantly improves the payback period. Most whole-home gas tankless units pay for themselves through energy savings within 5 to 8 years.

Frequently Asked Questions About Whole-Home Tankless Gas Water Heaters

Final Thoughts on Choosing the Best Tankless Gas Water Heater for Whole Homes

After 4 months of testing 10 of the best tankless gas water heaters for whole homes, three products rise to the top. The Rinnai RX199iN is our editor’s choice for its combination of 11.1 GPM flow, indoor/outdoor flexibility, and UEF 0.98 efficiency. The MIZUDO 10.3 GPM is the best value pick, offering nearly identical specs at a fraction of the cost with strong smart features. For smaller homes on a budget, the APUS 4.42 GPM delivers reliable on-demand hot water without breaking the bank.

The biggest decision point is honestly sizing. Don’t buy a 5 GPM unit for a 4-bathroom home and expect to be happy. Match the unit to your household’s actual peak demand, factor in your climate’s groundwater temperature, and add 20 percent headroom for future-proofing. A properly sized tankless gas water heater for whole home use will outlast two traditional tank units while delivering endless hot water and meaningful energy savings through 2026 and beyond.