Heating a small, self-contained annex can be tricky without sacrificing outdoor space or the building’s charm. Vietec Plumbing and Heating chose the Versi-O heat pump for its adaptable design, quiet operation, and stylish dual-grille construction. Paired with the Hydro C2, the system delivers year-round comfort with minimal visual and spatial impact.

Challenge

The annex had:

• Limited outdoor space

• No opportunity for a conventional front-facing heat pump

• The need for discreet, efficient heating without compromising aesthetics

A bulky, exposed evaporator would have spoiled the exterior, so a flexible solution was essential.

Why the Versi-O Was the Perfect Fit

Thanks to its ventilation grilles on both front and rear:

• Sideways installation was possible, hiding the evaporator from view

• Flush fit against the wall, maintaining a neat exterior

• Maximised outdoor space, leaving room for access or landscaping

Key Benefits

Aesthetic Appeal
✅ Heat pump blends seamlessly into the annex exterior

Space Optimisation
✅ Sideways installation preserves perimeter space for access or future additions

Efficient Operation
✅ Dual-grille design maintains performance even in a tight fit

Inside Solution: Hydro C2

Inside the annex, the Kronoterm Hydro C2 offered an equally space-efficient solution. This compact, all-in-one unit combines the expansion vessel, hot water cylinder, and buffer tank into a single system, simplifying installation and removing the need for multiple separate components. The Hydro C2 not only saves valuable indoor space but also provides efficient, reliable heating and hot water, integrating seamlessly with the Versi-O to keep the annex comfortable all year round.

Installer Insight

The Versi-O’s design gave us the freedom to install in a tight spot without sacrificing performance, and the Hydro Unit made the internal setup just as neat. For annexes and small properties, this combination is great option. — Vietec Plumbing and Heating