Gas
Low-NOx Condensing Gas Storage Water Heater – PRO Series
- Thermal efficiency ≥107%
- NOx < 30 mg/m³
- 30–99 kW
Commercial Water Heaters & Boilers
OTTMEL’s commercial gas and electric water heaters, condensing boilers and electric boilers. Each product page includes published performance data to support distributor and project procurement.
Gas water heaters & condensing boilers
CLASSIC storage water heaters, low-NOx PLUS and condensing PRO storage water heaters, premix fire-tube boilers and stainless steel condensing boilers, with published capacity, efficiency, NOx and connection data.
Gas
Low-NOx Gas Storage Water Heater – PLUS Series
- Thermal efficiency up to 98%
- NOx < 30 mg/m³
- 400 L tank
Gas
Commercial Gas Storage Water Heater – CLASSIC Series
- 22–99 kW
- 220–360 L tanks
- Pressure rating 1.1 MPa
Gas
Condensing Premix Storage Fire-Tube Boiler
- 240–700 kW
- NOx 22.3–24.7 mg/m³
- Modulation up to 12:1
Gas
Stainless Steel Condensing Direct-Flow Boiler
- Efficiency up to 107%
- NOx ≤ 25 mg/m³
- Modulation up to 10:1
Electric water heaters & boilers
Commercial electric storage water heaters, large-capacity electric boilers and floor-standing electric heating boilers for sites where electric supply is preferred.
Electric
Commercial Electric Storage Water Heater
- 6.4–90 kW
- 320–500 L
- BLUE-ARMOR enamel tank
Electric
Commercial Electric Boiler (Large Storage)
- 180–720 kW
- 495–1,150 L
- Grouped heating control
Electric
Floor-Standing Electric Heating Boiler
- 12–99 kW
- Thermal efficiency > 98%
- 380V/50Hz
Quick comparison
| Product | Energy | Published range | Typical use |
|---|---|---|---|
| PRO condensing storage water heater | Gas | 30–99 kW · 379 L · ≥107% | Domestic hot water |
| PLUS low-NOx storage water heater | Gas | 73–99 kW · 400 L · ≥98% | Domestic hot water |
| CLASSIC storage water heater | Gas | 22–99 kW · 220–360 L | Domestic hot water |
| Premix storage fire-tube boiler | Gas | 240–700 kW | Hot water and heating |
| Stainless steel condensing boiler | Gas | 50–2,667 kW heat input | Heating (modular) |
| Electric storage water heater | Electric | 6.4–90 kW · 320–500 L | Domestic hot water |
| Electric boiler, large storage | Electric | 180–720 kW · 495–1,150 L | Domestic hot water |
| Floor-standing electric heating boiler | Electric | 12–99 kW | Space heating |
Need a quotation or datasheet?
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