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  • COMMAIK
    • Contact Form
    • Imprint
    • Privacy
  • The Villa
    • The top floor
    • The upper floor
    • The first floor
    • The cellar
    • The garden
  • Stories from the construction
    • irrigation
    • Photovoltaics
    • Pool and terrace
    • SmartHome
    • The planning
    • The demolition
    • The installation
    • Machinery
    • Restoration and working techniques
    • This and that
  • Videos
    • Build & Renovate
    • Irrigation
    • Carport
    • Gabions
    • Garden
    • Garden kitchen
    • Pool
    • Smart Home
    • Drying
    • Tutorials
  • TESTED & RATED
    • Heating solutions & energy
    • Outdoor & Garten
    • Pool & garden kitchen
    • Security & Smart Home
    • Tools & DIY
  • Commaik Music
  • Privacy
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  • Robot lawn mower without boundary wire in test: The best models in comparison

    A robot mower glides across a well-manicured grassy lawn bordered by white gravel, with a patio area and outdoor chairs visible in the background. www.commaik.de

    Robotic lawn mowers without boundary wires make lawn mowing smarter and more flexible. Instead of perimeter wire, they rely on GPS, RTK navigation and camera technology – this saves installation effort and offers more precise control. My detailed comparison shows which models are convincing in the test, where the strengths and weaknesses lie and which robotic mower is best suited to which garden conditions.

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    A heating box containing technical equipment, including a white plastic tank with a blue cap, wiring, and black components, is open on a stand in a workshop with wooden walls. www.commaik.de

    Build your own mobile heating box: The best DIY solution with an 8kW diesel parking heater

    6. January 2025
    Partially built outdoor wall of white concrete blocks with exposed electrics, a level tool, and a hammer on top—ideal for a future garden kitchen. A canopy and stacked firewood appear in the background. www.commaik.de

    Build your own garden kitchen – plan and install the electrics

    19. March 2024
    A 4K PTZ Reolink security camera monitors a man walking towards a large house at dusk. A digital overlay highlights the camera's facial recognition and zooms in on the man's face with a blue square frame. www.commaik.de

    The best Reolink 4k PTZ surveillance cameras in comparison: 823S2 vs 823S1 vs TrackMix vs TrackFlex in test

    27. February 2026
  • Planning automatic garden irrigation: step-by-step instructions for efficient lawn irrigation

    A sprinkler sprays water over a dry, brown patch of lawn in a sunny backyard, illustrating the importance of garden irrigation. A blue shed and green trees provide a lush backdrop. www.commaik.de

    Well-designed garden irrigation is the key to a lush green lawn and optimally nourished plants. In this article, I show you how I planned my lawn irrigation with the DVS irrigation tool. I explain the most important planning steps, explain how to choose the right sprinklers and show you how to calculate the optimum water volume and pressure. In addition to planning, I also discuss typical mistakes that should be avoided. If you want to design your lawn irrigation efficiently, you will find all the important information here – including a detailed planning video.

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    A black Reolink NVR device is shown against a gray background. A large text in German reads "Hard disk retrofitting". The Reolink logo appears in the bottom left corner. www.commaik.de

    Expand Reolink NVR storage space – Installing and configuring hard disks correctly

    26. February 2026
    Close-up of two wire connectors and a cut green boundary wire on grass, with wire cutters and a plier nearby; white stones are visible in the background. www.commaik.de

    Repairing broken wires: Finding and repairing the boundary wire for robotic lawnmowers

    23. November 2024
    A Lymow One robotic lawnmower with tank-like tracks sits on a well-manicured lawn, surrounded by green grass and some fuzzy bushes in the background. www.commaik.de

    Lymow One in test: Robot mower without boundary wire with RTK navigation and chain drive

    16. November 2025
  • 5 diesel parking heaters compared: which one is right for you?

    A cozy wooden cabin interior with a red Hageer wood stove burning brightly and a parking heater nearby, next to an indoor fire pit. Snowy trees are visible outside through large windows and a wooden fence. www.commaik.de

    A mobile diesel-based parking heater is an efficient way to reliably heat motorhomes, workshops or garden sheds. As a mobile heater, it offers independence from power sources and provides pleasant warmth even in icy temperatures. This article provides a comparison of the best diesel heaters, an overview of their advantages and disadvantages and important tips on safe use.

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    Lawn irrigation system components, including pipes, valves, and wiring, are laid out on the ground next to an open valve box in a grassy area. A green garden hose and plastic cover are also visible. www.commaik.de

    Installing lawn irrigation: Valve box, Hunter solenoid valves and Rain Bird water distribution in detail

    1. March 2025
    Close-up of an ALLPOWERS powerstation with a digital display showing 74% battery, 499W output, and several connected cables and outlets on the front panel. www.commaik.de

    LiFePo4 Powerstation – mobile storage for stand-alone PV systems

    5. January 2024
    The dreame a1 pro, a modern robotic lawn mower with a sleek grey design, operates on a grassy lawn, with a building and potted plants visible in the background. www.commaik.de

    Dreame A1 Pro in test – Cordless robotic lawnmower without boundary wire & RTK

    24. May 2025
  • Reolink Argus Eco Ultra review: 4K rechargeable surveillance camera without subscription

    A man thoughtfully poses in front of images of the Argus Eco Ultra cameras, a solar panel, and a backyard pool. The Reolink logo is at the top right, with "Argus Eco Ultra" displayed prominently in bold text. www.commaik.de

    The Reolink Argus Eco Ultra is a 4K battery-powered surveillance camera that works completely wirelessly and impresses with smart motion detection and color night vision. The test shows how good the image quality really is, how reliably the motion detection works and whether the battery delivers what it promises in practice. There is also a look at the storage options with microSD card, Home Hub and Home Hub Pro as well as integration into smart home systems such as Alexa, Google Assistant and Home Assistant.

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    A smart irrigation controller displaying “Hydrawise” is shown with an arrow pointing to a sprinkler watering a lush green lawn in the backyard. www.commaik.de

    Installing and programming the Hunter Hydrawise irrigation computer – step by step

    24. August 2025
    A man points at a metal heating box containing machinery and a yellow fluid tank; a large white arrow indicates transferring liquid from a red fuel container into the parking heater. www.commaik.de

    Upgrading the diesel parking heater: Installing a tank extension for the mobile heating box

    19. January 2025
    Graphic featuring multiple Reolink security cameras and a video recorder on a gray background, with “Reolink Firmware Update?!” highlighted in bold text at the center. www.commaik.de

    Update Reolink firmware quickly and safely: Step-by-step guide for cameras and NVRs

    7. February 2025
  • 6 steps to perfect pool water after the winter break

    A clear outdoor swimming pool with sparkling pool water reflects sunlight, surrounded by palm trees and neatly trimmed bushes on a bright, sunny day. The wooden pool deck features a depth marker reading 1.0 M. www.commaik.de

    After the winter break, the pool water is often cloudy and contaminated with deposits and algae. A few important steps are required to ensure that the pool is clean and inviting again in time for the swimming season. From thorough cleaning and topping up the water to optimally adjusting the water values – only with the right care will the water remain crystal clear and hygienic. I have tested various methods and products to quickly restore the pool water to an ideal condition after the winter break. In this article, I will show you the best solutions for effective pool maintenance and present tried-and-tested products that can be used to…

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    A rectangular outdoor swimming pool with clear blue water is surrounded by gray tiled paving and pool edge stones. There is a small palm tree, green grass, and hedges in the background. Some tiling work appears unfinished on one side. www.commaik.de

    Laying pool edging stones and building your own pool terrace for the perfect pool surround

    8. December 2024
    An empty, bright blue swimming pool with a smooth pool liner, gray steps in one corner, and a circular drain on the wall. The outdoor pool is surrounded by unfinished ground and scattered greenery. www.commaik.de

    Laying, gluing and welding pool liners correctly

    10. February 2024
    A small backyard swimming pool with clear blue water is surrounded by patio stones. The covered outdoor seating area, topped with solar panels, offers a perfect spot for winterizing the pool. A palm plant sits in the foreground. www.commaik.de

    Winterizing the pool – putting pool technology into operation and adjusting water values

    29. January 2024
  • Efficient heating with infrared heating foil: installation, experience and tips for electric wall heating

    A man holds a roll of infrared heating foil. An arrow points to a thermal image revealing heat distribution on the floor. The words Infrarot Heizfolie are displayed above. www.commaik.de

    An infrared heating foil as wall heating can heat rooms efficiently and sustainably. In my current project, I tested this technology in an old cellar that was previously difficult to heat. From installation and test runs to control with smart systems, I share my experiences, show the advantages and disadvantages of infrared heating and explain how the humidity in the room was reduced.

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    A surveillance control room with six security cameras surrounding a Reolink recording device on a desk, monitors displaying blurred Reolink footage in the background. www.commaik.de

    The best storage solutions for Reolink surveillance cameras: recommendations & experiences

    31. January 2025
    A person in dark clothing stands by a white counter, holding a metal tube and a small rectangular device. Behind the counter is a white and black parking heater machine labeled Motour with various attachments and a red button. www.commaik.de

    Heating optimization: How to make your diesel parking heater quieter – pump and silencer in the test

    20. December 2025
    A Hunter sprinkler sprays water across a sunlit green lawn, providing efficient lawn irrigation with trees and a building in the background on a bright, clear day. www.commaik.de

    6 Hunter pop-up sprinklers for optimum lawn irrigation in the test

    21. May 2025
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Autor & Blogger

In this construction diary, we share our experience in the renovation and modernization of our Art Nouveau villa and hope to give a few suggestions and tips to some of you.

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