Anyone familiar with our Calor air parking heaters knows how much comfort a good parking heater can bring to a vehicle. Warm air at the touch of a button, controllable via app, reliable in any weather — that has always been our standard. With the Calor CL5, we now expand on this principle with a new technology: the coolant parking heater. And it brings several advantages that a pure air heater simply cannot offer.

Two technologies, one goal: maximum comfort

Our air parking heaters warm the interior air directly — fast, efficient, and ideal when the focus is on cozy warmth while sitting in the vehicle. The Calor CL5 takes a different approach: it's a coolant parking heater that works via the vehicle's existing coolant circuit. That may sound technical at first, but in practice it makes a decisive difference. When the coolant is heated, it's not just the interior that benefits — the engine itself does too.

The Calor CL5 — compact, requires no vehicle registration changes, and integrates into existing coolant circuits.

The benefit for your engine

A cold engine start in winter puts strain on any vehicle. Oil and coolant are thick, components must first reach operating temperature, and wear is especially high during this phase. This is exactly where the Calor CL5 comes in: since the coolant is already pre-warmed, the

 engine starts more gently and reaches operating temperature significantly faster. This is an effect that a pure air heater naturally cannot achieve — after all, it only warms the air inside the cabin, not the engine.

Clear windows instead of scraping ice in the early morning

Anyone who commutes in winter, or simply dislikes standing in the cold in the morning scraping the windshield, will appreciate the Calor CL5. Since the heat reaches the vehicle via the coolant circuit and the ventilation ducts, the windows can be effectively de-iced before you even set off.

You get into a warm vehicle with a clear view — no ice scraper required.

Smart control as you know it

Anyone already using our air parking heaters will feel right at home with the Calor CL5's control concept. Here too, a smart WLAN controller is used, letting you conveniently start, schedule, and monitor the heater via smartphone app. Whether you activate the heater during breakfast or set fixed schedules for your commute — operation remains just as simple and intuitive as you're used to from us.

The complete installation kit for the Calor CL5 — including controller, wiring harness, and everything needed for installation.

Which heater suits whom?

Both systems have their strengths and don't exclude one another — quite the opposite, they complement each other excellently.

Air parking heater Calor CA2/CA4

Ideal for fast, noticeable warmth inside the cabin — for example in motorhomes or camper vans, where

a lot of time is spent in the parked vehicle.

Calor CL5

Excels wherever, alongside cabin comfort, the engine and windows also matter — classically in passenger cars and commercial vehicles during winter operation.

It can even be worthwhile to use both systems at the same time to benefit from their respective strengths — for example, an air heater for comfortable time spent in the vehicle and the CL5 for the optimal start in the morning.

Efficient and uncomplicated

The Calor CL5 impresses with strong performance at low consumption:

Like all our Calor heaters, it carries the relevant certification marks and requires no registration changes — installation is therefore just as straightforward as with our proven air parking heaters.

Conclusion

With the Calor CL5, we're closing an important gap in our range. While our air parking heaters remain the top choice for fast interior warmth, the CL5, as a coolant parking heater, brings additional benefits for the engine and windows — especially for anyone who regularly drives their vehicle in winter. This way, you'll find the right solution with us for every use case, so you can face cold mornings with ease.