"I've always heard friends say that the new wall-hung boilers are really gas-efficient, especially the fully premixed ones." Thinking about the bills from every heating season, I gritted my teeth and replaced my old unit. But after an entire heating season, my gas bill was still the same. Staring at the payment record on his phone, Mr. Li’s face was full of frustration.

He bought a very common "hot‑selling" condensing boiler, driven entirely by the "first‑class energy efficiency" and "save 30% gas" claims. In actual use, the heating was fine, but the wallet he most wanted to protect was still empty.

He asked around in a chat group and found that everyone’s experience was pretty similar — "It's a bit better than an ordinary wall‑hung boiler, but nowhere near as magical as the ads say." The extra few thousand yuan he spent — who knows when he’ll save that back in gas?

Seeing this, you might start to wonder: "Is a condensing wall‑hung boiler really just a 'smart tax'?"

Hold on. Mr. Li’s disappointment came precisely because he bought a boiler with a "good body" but a "dumb brain." The real gas‑saving champion is far smarter and more durable than you imagine.

Ordinary condensing boiler: High thermal efficiency that declines over time — a clogged filter ruins everything

Why do many households find that their condensing boiler seems to save gas when first installed, but reveals its true nature after a year or two?

Two key reasons: one is the lack of a "smart brain"; the other is the air filter’s tendency to "strike."

• No intelligent adjustment: Most condensing boilers are like a generator running full throttle all the time. When it's 10°C outside, it heats water to 60°C; when it's 0°C outside, it still heats water to 60°C. On mild days, gas is wasted; on cold days, warm‑up is slow.

• Air filter dust buildup → thermal efficiency plummets: A condensing boiler draws in a lot of air during operation. Dust and lint in the air slowly clog the filter.

For ordinary boilers, cleaning the filter requires a service call — the casing must be taken apart. So many people simply don’t do it. The result: a clogged filter, insufficient air intake, incomplete combustion. The originally claimed 105% thermal efficiency gradually drops. Gas savings? Be glad it’s not wasting gas.

A truly gas‑saving wall‑hung boiler must deliver: high thermal efficiency that stays high.

Powerful combustion: Thermal efficiency up to 106%

The so‑called fully premixed combustion technology means that gas and air are thoroughly mixed at the optimal ratio before entering the combustion chamber. With precise control from an intelligent system, every bit of gas is fully utilized.

Tested by an authoritative institute, our fully premixed condensing gas wall‑hung boiler achieves a thermal efficiency of up to 106% — far exceeding the national first‑class energy efficiency standard. With the same radiators and the same room temperature, gas consumption is significantly reduced at the source.

Quick‑release air filter design — an industry first, keeping thermal efficiency stable without decay

No matter how high the thermal efficiency, without enough air for complete combustion, it’s useless. That’s why we’ve created a unique quick‑release air filter structure — no complex tools, no professional service required. Simply unscrew a specific screw, pull gently, and the air filter slides out.

Clean it regularly to ensure smooth air intake and complete combustion at all times. This guarantees that thermal efficiency never degrades over the entire lifecycle of the product. Over time, the gas savings are substantial.

Survivability in any environment

Gas boiler

Ordinary wall‑hung boilers are like "greenhouse flowers" — gas pressure must be stable, tap water pressure must be high, or they throw a tantrum.

Low gas pressure combustion technology: Operates normally even at 300 Pa
Old residential areas, peak gas usage hours, pipeline endpoints — fluctuating gas pressure is the norm. To address these special situations, we’ve equipped our boiler with low gas pressure combustion technology. It continues to burn stably even at a gas pressure as low as 300 Pa, ensuring uninterrupted heating and hot water.

Ultra‑low water pressure start‑up technology: No problem for high‑rise or older buildings
Online, people often complain that their boiler produces too little water flow or simply won’t ignite. To solve this, we’ve specially optimized the water flow sensing system for residents on high floors or in older top‑floor apartments. Even with very low water pressure, the boiler operates normally.

Constant temperature — a standard feature for any wall‑hung boiler

What’s the biggest fear with heating and bathing? Sudden temperature swings — hot and cold.

To ensure that our wall‑hung boiler delivers stable water temperature within 30 seconds and keeps temperature fluctuations strictly within ±1°C, we’ve integrated an intelligent proportional valve temperature control system into the boiler. It adjusts the gas proportional valve in real time based on changes in incoming water temperature and flow rate. With a wide temperature adjustment range of 35–65°C — warm in summer, hot in winter — you can set it as you like.

NOx emissions far below the national Grade 5 limit

Gas boiler

Environmental protection isn’t just a slogan — it’s backed by hard data. The national Grade 5 limit for NOx emissions is 70 mg/kWh. Our emissions: 30 mg/kWh. Lower nitrogen oxide emissions are genuinely better for you, your neighbors, and your community’s air quality.

Scale‑resistant, corrosion‑resistant — looks and performs like new for ten years

Gas boiler

Whether it’s a water heater or a wall‑hung boiler, long‑term use inevitably leads to internal scaling. For condensing models, components are also at risk of corrosion from condensate.

We’ve addressed these problems with two built‑in heat exchange systems:

• Integrated stainless steel condensing heat exchanger: One‑piece construction reduces weld seams, improves heat exchange efficiency, and greatly enhances corrosion resistance.

• Stainless steel plate heat exchanger: Dedicated to domestic hot water — excellent scale resistance, not easy to clog, not easy to rust.

Two systems working in parallel. We’re not just aiming for stable efficiency in the first two years — we want thermal efficiency to remain high after many years of use.

So quiet you can forget it’s there

Gas boiler

The national standard allows operating noise ≤65 dB for wall‑hung boilers. Through multiple noise‑reduction measures — including airflow path optimization, combustion chamber soundproofing, and water pump vibration damping — we’ve reduced maximum operating noise to 45 dB.

What does 45 dB mean? Slightly louder than turning a page in a library. You basically won’t notice it while sleeping at night. Kids doing homework or elderly family members resting won’t be disturbed.

From troublesome to carefree

Gas boiler

“I have two cats. My old boiler used to get completely clogged, and each service call cost over 100 yuan. Now with this quick‑release filter, I rinse it once a month. My gas bill is nearly 20% lower than last year’s boiler.”
— Ms. Zeng, Chengdu

*“I didn’t really believe the 106% thermal efficiency at first. But after using it for an entire winter and seeing the bill, I was convinced. And cleaning the filter myself is really convenient — whenever I clean my A/C filter, I clean this one too. No need to ask for help.”*
— Mr. Zhou, Suzhou