PA66 + 15% glass fibre housing
ECO
Flame-type pulse ignition
The platform at its simplest — one knob, a flame-type control and an LED that reports the state.
Portable gas water heater · OEM / ODM
Portable Gas Water Heater Manufacturer,
Shunde-built,
certified for export.
An outdoor gas water heater built to your drawing — one platform, three control levels. 100% gas-tested, not sampled, and a 24-month warranty on the order. Shipped under your own mark.
- 6 kW
- heat input
- 2.2–3 L/min
- water flow
- IPX4
- enclosure rating
- PA66 + 15% GF
- housing resin
The difference
A trading desk looks like a manufacturer
until something goes wrong.
Both send a catalogue and a price. The difference shows up when a spec changes, a certificate is questioned, or a batch lands off-target.
| Aspect | Typical trading desk | Gulfstone standard | How you can check it |
|---|---|---|---|
| Factory access | A showroom and a catalogue. Production is a third party you cannot name. | You know which plant builds your unit, and can walk the line before you commit. | Factory tour, on site |
| Material verification | The copper and the gas-path valves are described in an email and taken on trust. | Incoming material is inspected against our standard on arrival. | Incoming inspection records |
| Build levels | Each price point is a different unit, with its own gas path and spares list. | ECO, PLUS and PRO MAX share the exchanger, burner and protections. | Which parts change between builds |
| Spec changes | A change means a new supplier, a new quote and a reset schedule. | Tooling and component supply sit inside our own base. | What a shell revision costs in lead time |
| Certification | Certificates are discussed, then chased after the container has sailed. | One tested configuration, and the file travels inside the load. | The pack that ships with the lot |
| Quality ownership | A defect is a conversation with a factory that does not answer to you. | One QC standard, and a factory answer on a batch claim in 24–48 hours. | Who answers a batch claim — sales or the line |
The line
Three builds.
One machine underneath.
ECO, PLUS and PRO MAX are the same exchanger, the same gas path and the same protections. What changes between them is the control face and what it takes to run.
PA66 + 15% glass fibre housing
PLUS
Portable controller with battery
Adds a rechargeable battery pack and a portable controller, so it runs with nothing plugged in.
PA66 + 15% glass fibre housing
PRO MAX
Thermostatic proportional valve
A proportional valve holds the outlet temperature steady, with a button-set thermostat and a near-zero standby draw.
The specification
The platform, in full —
then what differs.
Every figure the line ships to, stated once because all three builds share it, and the short list of rows that separate ECO, PLUS and PRO MAX.
What stays the same, on all three
- Heat input
- 6 kW (20,000 BTU/h)
- System voltage
- DC 12 V
- Water flow
- 2.2–3 L/min
- Gas consumption
- 20 MJ/h
- Fuel
- Propane or butane · high-altitude canister
- Waterproof grade
- IPX4
- Product material
- PA66 + 15% glass fibre, flame-retardant and UV-stable
- Oxygen-free copper tank
- 1.03 kg
- Burner assembly
- Short, four-row
- Hood assembly
- Stainless steel, anti-backdraft
- Charge stabilisation
- 14 V, built-in boost module (optional)
- Product size
- L400 × W170 × H310 mm
- Package size
- L440 × W235 × H447 mm
- Net weight
- 6.1 kg
- Gross weight
- 9.3 kg
What changes, and where
| Spec | ECO | PLUS | PRO MAX |
|---|---|---|---|
| Power | |||
| Battery packECO takes DC 12 V from an external supply; PLUS and PRO MAX carry the pack. | — | 18650 · 2500 mAh (21700 · 4000 mAh optional) | 18650 · 2500 mAh (21700 · 4000 mAh optional) |
| Run time, full charge | — | 100 min | 100 min |
| Charging time | — | About 3 h | About 1 h |
| Standby draw | — | 30 mA | < 1 mA |
| Control | |||
| Control system | Flame-type pulse | Portable controller | Proportional valve controller |
| Display | None — LED status lamps only | LED, knob and button | LED, button |
| Valve assembly | Single-axis valve | Single-axis valve | Thermostatic proportional valve |
| Adjustment | Knob | Knob | Button |
| Thermostatic control | — | — | Precise outlet temperature setting |
| Base rocker switch | ✓ | ✓ | — |
| Fault-code display | ✓ | ✓ | ✓ |
In the field
Built to cut out
before it becomes a claim.
The same nine cutouts on all three builds — the control level changes what the unit does, never how it fails safe.
Tilt protection
Knocked off a tailgate, it stops firing instead of running on its side.
Scald protection
The gas cuts before the outlet runs past the temperature you set.
Flame-out protection
Ignition is proved before gas stays on; a lifted flame cuts the supply.
Short-circuit protection
A supply fault trips the unit, not the harness.
Overcharge protection
Stops accepting charge at full, so a left-on charger cannot cook the pack.
Overvoltage protection
A spike on the DC input is clamped, not carried into the controller.
Over-discharge protection
Cuts before the pack is drawn flat — what kills a stored cell.
Overcurrent protection
The draw is limited at the board, so a stalled pump cannot cook the wiring.
Fault-code display
Faults report as a code, not a dead machine with no answer.
The supply base
Built where the parts already are.
One district, one audit.
Shunde, in Foshan, Guangdong, is one of the densest gas-appliance clusters in the world. What that buys a buyer is not a slogan — it is what is physically next door.
- Shunde
- Foshan · Guangdong
- 6
- nearby trades
- 2
- load ports
The district behind China’s gas-appliance cluster — the supply base this line is built in.
Exchanger copper, gas valves, ignition, tooling, cartons and test labs, all within the district.
Nansha and Yantian, both sailing out of Guangdong for FOB terms.
Within the district
- Heat-exchanger copper
- District mill and coil stock
- Gas valves and igniters
- Local valve and ignition suppliers
- Injection and die tools
- Tool shops within the district
- Housing resin and masterbatch
- Compounder within the cluster
- Cartons and print
- Local pack and litho plants
- Test labs and certification
- In-house chamber plus third-party labs
Parts that are not in anyone’s catalogue
A valve seat, a mesh grade, a masterbatch colour — suppliers here tool short runs, because two hundred other makers share the street.
Material provenance you can walk to
Copper and gas-path valves come from named plants a short drive away — ask where a batch was drawn and you get an address.
Capacity that grows next door
A rise in season two is met by an adjacent line under the same audit — not a new factory found mid-program.
Certification and quality
Certified for your market,
documented for your buyer.
Certification attaches to one tested configuration, so it is mapped to the build and the market before the order is placed. The file ships inside the load.
The configuration
One certification configuration, whichever build you carry
ECO, PLUS and PRO MAX share the exchanger, the gas path, the burner and the enclosure — so they certify as one tested configuration. A buyer taking two builds, or moving from one to another, carries one set of approvals rather than three.
Australia / NZAS/NZS 2658-2022AGA certificate, LP gas portable appliances
North AmericaClass 2781 06 / 86CSA report, camping equipment gas water heaters
Europe / UKLVD 2014/35/EUCE verification, EN IEC 60335-1 · EN 62233
Where requiredRoHS · REACHMaterial restriction on the housing and electrical parts
One standard, every build
| Check | Standard | Sampling | Method |
|---|---|---|---|
| Incoming materials | MPI 2.0 | AQL 1.0 | Metal and gas-path parts against the locked spec |
| Dimensional and fit | ISO 2859 | AQL 2.5 | Cut-outs, threads and mounting points |
| Combustion | Factory spec | 100% | Fully-premixed burn-in on the assembled gas path |
| Gas safety | EN 26 / CSA 4.3 | 100% | Dual-valve over-ignition and flame-out |
| Control side, per build | Factory spec | 100% | Valve, controller and display proven on the build they ship with |
| Anti-freeze | Factory spec | AQL 1.5 | Drain-valve residual-water check |
| Export pack | ISTA | AQL 4.0 | Packaged unit, 1 m drop and carton check |
In the shipment file
- Approvals evidence for the locked configuration
- In-house test records from the gate checks
- Control-side records for the build carried
- Certificate of origin and the FOB documents
- Packing list and the units-per-container calculation
- Manuals and artwork in the destination language
OEM / ODM
Your design.
Our line.
Your own mark on any of the three builds, from a drawing to a shipping container: what moves, and what stays fixed.
Free to change
Your mark on the unit and the pack
No tooling. Your colour, logo and carton are quoted in the first reply.
Colour, logo, carton and manual move without tooling spend, so a first order does not have to fund a mould to carry your brand.
- Housing colour to a Pantone or RAL target
- Moulded in, not painted — the shell is resin, so colour is in the part
- Logo on the unit and the carton, with barcode and hero art to your channel
- Retail-ready packaging built to the shelf it lands on
Set to the market, certified with the unit
No tooling. The unit arrives set and certified for your market.
The gas setting and the certification scope are fixed at build, against the market you are selling into — not adjusted at the destination.
- Gas setting locked at build for the destination market
- Certification scope mapped before the order, not applied for after it sails
- The certified unit is the unit that ships — no post-arrival conversion
- Approvals evidence held against the locked configuration
Engineering & tooling
A drawing review before anyone quotes
No tooling. The fit and DFM review comes back before anyone quotes.
Send a CAD file, a reference unit or a sketch. The engineering team reads it against the housing, the gas path and your market, and comes back with what will not fit before a price is attached to it.
- DFM notes on the shell, the handle and the assembly
- Tolerance stack and wall-thickness called out before tooling
- Fit review against the destination market’s requirements
- A sampling plan in the first reply, not after the PO
A private shape, when the platform is not enough
A private mould, quoted against your drawing once it is locked.
A private tool changes the part itself rather than the mark on it, quoted against your drawing once that drawing is locked.
- Part and handle tooling, quoted against the locked drawing
- Tolerance stack and DFM notes settled before any tooling is cut
- Your IP covered under NDA ahead of the first drawing
- The platform stays available if the shape does not need to change
Before you go further
A short brief is enough: which build, which market, how many a year.
You have seen the standard and what it takes to make the line yours. Tell us the market and the volume, and the reply is a cost direction and a sampling plan — with the documents below to check it against.
The file pack
Take the documents
with you.
The same pack that ships inside the container, available before you ask. Read the specs, open the bill of materials, load the cut-out into your own CAD.
Specification sheetPDFThe three builds side by side — heat input, flow, gas, the copper tank, and which control, valve and battery each build carries.Bill of materialsCSVEvery part with our part numbers, and which of ECO, PLUS and PRO MAX carries it. Sortable, and yours to cost.Panel cut-out drawingDXFThe 400 × 310 panel outline, the four mount-hole centres and the two connection points as real geometry — load it into your CAD.Packing listPDFCarton, unit and loading figures for an export container — what fits one 40-ft and how the load is built.
Want the pack for a different build, or the certification dossier for your market? Ask for it by name and it comes back with the quote.
Terms
The terms, in writing,
before you commit.
The commercial terms as they will read on the order — the money, the schedule and what happens if a unit comes back.
- Sample
- 10–18 days
- A physical approval unit on the real housing. Approving it locks colour, gas setting and pack onto the order.
- Payment
- 30% deposit, 70% before shipment
- What starts the run and what releases the container, fixed in writing rather than agreed at the port.
- Load port
- Nansha · Yantian
- FOB out of Guangdong. Cube advice is run against your actual carton before you commit the order.
- Warranty
- 24 months
- Free warranty service including maintenance, written on the order rather than offered as goodwill.
- Returns
- 30 days
- Replace or refund on a returned unit, not negotiated one at a time.
- Response
- 24–48 hours
- A factory answer on a batch complaint, not a holding reply.
Buyer voices
What came of the last two programs on this line
Two buyers across the builds — the entry SKU that had to hit a price point without leaving the platform, and the thermostat that stopped a service call.
“We could hit the price point without leaving the platform.”
The previous supplier answered our entry-SKU brief with a cheaper line — different gas path, different spares, a second set of failures to learn. Gulfstone kept all three builds on one platform: same exchanger, same burner, same protections, without the thermostatic valve.
One spares list, one QC standard and one set of gate checks now cover the whole range. The entry SKU landed 23% under the thermostat model, and 2,400 units in it has not taken a single sale from the hero SKU.
Marta NowakProduct Manager at a European outdoor retailer
“The thermostat is what the second order was waiting on.”
Rental customers were dialling the temperature back by hand and reporting it as a fault — two seasons of service calls. The PRO MAX build holds the outlet temperature itself, and Gulfstone ran it on the same line as the build we already carried.
Temperature complaints fell from 41 a season to 3. The 1,200-unit second order went in on the same platform, the same dock and the same paperwork as the first.
Anders LindqvistPurchasing Manager at a Scandinavian equipment hire company
Questions on the line
What buyers ask before choosing a build
The questions these three builds raise — which one to start on, what the ECO runs from, what the thermostatic build actually changes, and what a program commits you to.
01Which build should we start on?
Start from the unit’s job, not the price. If the end user sets a temperature and expects it to hold, that is PRO MAX and its thermostatic valve. If it runs off a vehicle or a site supply and nobody needs a set outlet, ECO does the same job on the same platform. PLUS sits between: battery pack and controller, no thermostat.
02What powers the ECO build?
No battery pack. It takes DC 12 V from a vehicle, a portable power station or a site battery, and ignition is the only thing that draws power. PLUS and PRO MAX carry a rechargeable 18650 pack instead, with 21700 cells optional.
03What does the thermostatic valve actually change?
On ECO and PLUS the outlet follows the water going in: set the flame and the flow, and the temperature is whatever those produce. PRO MAX reads the outlet and modulates a proportional valve to hold the temperature you set, so a pressure change at the tap does not arrive as a scald or a cold shock.
04Can we carry more than one build in a program?
Yes — they are the same platform, so a mixed program is a normal order. Buyers often take ECO or PLUS as the volume SKU and PRO MAX as the hero, or start on one build and add another later without a second supplier, a second spares list or a second QC standard.
05What is the lead time — on a sample, and on a production run?
A sample is 10–18 days on the real housing; approving it locks colour, gas setting and pack onto the order. A production run is not a number we publish — it moves with the build, the pack and the port. Send the volume and the sailing window and the date comes back against your actual order.
06Do the three builds share spares and tooling?
Yes, and that is the point of the line. ECO, PLUS and PRO MAX share the heat exchanger, the gas path, the burner, the hood and the shell, so one spares holding covers all three. Only the control side changes — the valve, the controller and the display.
07How is our design protected if we go to a private mould?
An NDA is signed before the first drawing. Colour, branding, carton, manuals and gas setting move with no tooling spend. If the shape itself has to be yours, a private shell or handle mould is quoted against the locked drawing and run only against your order.
Start a program
The brief goes to the engineer who builds it.
Market, annual volume and the certification it must carry — three lines, and we have what we need. Your reply comes from the engineer who would run the line, scoped to your program rather than matched off a shelf.