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Steam replacement
SE-UHT Series

Ultra high temperature — 120 °C without a boiler

Pressurised hot water up to 120 °C on R245fa, in two forms. Have warm process return to give up? The single water-to-water cycle is cheaper, simpler and more efficient. Have none? The cascade takes ambient air alone, down to −20 °C.

Sunniva Ultra High Temperature Heat Pump
Capacity
25–100kW
6 models, all published
Hot water to
125°C
at the rated condition
COP up to
2.99
at the rated condition
Datasheets
All
published, per model

Is this the right range for you?

Two minutes here saves a wasted quotation. The boundaries below are the published ones, not sales judgement.

Yes, if all of these are true

  • Your process needs 95 to 120 °C
  • You are running a steam boiler for process heat
  • Your duty starts at 25 kW
  • You have warm water to give up — or you have not, and want the cascade instead

Look at another range if

Applications

Where this range is normally installed.

Textiles
Chemicals
Pharma industry
Food industry
Dairy

Key features

What is inside the cabinet, and why each of them is there.

Water outlet temperature up to 120 °C

Two ways to reach 120 °C

The single cycle is independent of ambient because it never sees air — but it needs a warm source. The cascade takes ambient air alone and does derate in winter: 25 kW at 20 °C, 15 kW at −20 °C on the SE-UHT-25V. Pick on what heat you already have.

Heating capacity from 25 kW

Starts small for this class, so a single process line can justify one.

Reliable scroll compressor technology

High efficiency brazed plate heat exchanger

Smart display controller with MODBUS

Models in this range

Two cycles, two answers. Every figure is taken from that model’s own technical data sheet.

Cascade cycle — from ambient air (C on the price list)

Two refrigerant circuits in series. Takes heat from outdoor air alone, so it needs no waste heat and works anywhere a condensing unit can stand. Rated down to −20 °C ambient.
Fanned cabinet — takes heat from ambient air
Fanned cabinet — takes heat from ambient air
ModelHeating capacityCOP Hot water outputDimensions (L×W×H)
SE-UHT-25V25 kW 2.2215 LPH 860 × 780 × 1780 mm Datasheet ↓
SE-UHT-45V45 kW 2.2390 LPH 1550 × 780 × 1780 mm Datasheet ↓
SE-UHT-100V100 kW 2.5860 LPH 2260 × 1030 × 2170 mm Datasheet ↓

Single cycle — from waste heat (no C on the price list)

One circuit, fed with warm water instead of air. Cheaper and simpler, and its COP is higher, but it only works if you have a warm source to give up — process return, condenser water, or another machine’s reject heat.
Fanless skid — water in, water out
Fanless skid — water in, water out
ModelHeating capacityCOP Hot water outputDimensions (L×W×H)
SE-WWUHT-2527 kW 2.93— 860 × 780 × 850 mm Datasheet ↓
SE-WWUHT-5049.7 kW 2.99— 1550 × 780 × 850 mm Datasheet ↓
SE-WWUHT-10099.4 kW 2.99— 2250 × 1090 × 1050 mm Datasheet ↓

Benefits

What this range does for the building, rather than what is in the box.

Directly replaces a steam boiler

The only heat pump class that can, and it does it without a flue, a fuel yard or a boiler licence.

Waste heat becomes the fuel

The single cycle runs on warm water you are already throwing away — process return, condenser water, another machine’s reject heat — and turns it into 120 °C. On that version the January number equals the June number, because it never sees the ambient at all.

Starts at 25 kW

One process line can justify the investment without waiting for a plant-wide project.

Size your process duty, then pick the cycle

Set the process temperature above 80 °C and the calculator opens a second section that sizes this range directly. It asks the one question the choice turns on — is there a warm water stream to feed the evaporator, or only ambient air — then selects the single cycle or the cascade accordingly, and puts the running cost beside the cost of keeping your boiler as a top-up.

Built to order

Options on this range, quoted per order. None of them is the standard build and none is included in the model table above — ask at enquiry and have it confirmed on the order acknowledgement.

  • Water connection — Coupling type to suit the site — threaded, flanged or grooved.
  • Casing — Stainless steel or powder-coated finish.
  • Circulation pump — Can be built into the unit instead of being fitted in the plant room.
  • Condenser — Stainless steel or copper, in place of the standard build.

And what every Sunniva heat pump gives you

True of the whole range, not just this one.

  • Up to 75 % off water heating against electric, LPG or PNG
  • Quick payback and strong return on investment
  • The longest product life of any common water-heating technology
  • Silent operation
  • Hot water round the year, independent of sunlight
  • Lower carbon emissions
  • Negligible maintenance cost
  • Saves space against a boiler or a solar-thermal field

Common questions

The ones our engineers are actually asked.

Is it really a steam replacement?
It replaces the duty a low-pressure steam boiler is doing in many process plants — jacket heating, drying, sterilising — at 120 °C water rather than steam. Whether that suits your process depends on the equipment it feeds, which is worth a conversation.
How is it independent of the ambient?
The cycle and the source arrangement differ from an air-source machine. In practical terms the January output equals the June output, which is not true of any other range we make.
When will full data be available for the ultra high temperature range?
The 120 °C machines are the newest range and their data sheets are in preparation. Ask for the current selection table with your process temperature and duty, and whether you have waste heat to feed it — the two cycles are selected differently and that one answer decides which you need.

Manuals and related ranges

Performance figures are published test data at the stated conditions and are not a guarantee for a specific installation. Draw-off pattern, pipe runs, water quality, static head and local code all affect the final selection — confirm with Sunniva Encon LLP before ordering.

© 2026 Sunniva Encon LLP. The design and code of this page are our copyright. Results are indicative and offered in good faith — the method is set out above. Confirm the final selection with us before ordering.