How to Install Underfloor Heating in Container Houses
Installing underfloor heating in container houses requires targeted design modifications based on the characteristics of steel. Here are the specific steps:
1. Basic Insulation Treatment
The steel of container houses has strong thermal conductivity, so it is necessary to prioritize solving the problems of heat loss and moisture prevention. Lay 2-3 cm thick graphene XPS extruded insulation boards on the ground base (with a temperature resistance range of -20°C to 75°C). Their closed-cell structure can effectively trap heat and block underground moisture, preventing the steel from rusting due to condensation. Above the insulation boards, cover them with acrylic reflective film, which reflects heat into the room through its metal coating, reducing downward heat loss. Then lay snap-in flooring as a protective layer to prevent the insulation boards from being directly exposed and damaged.
2. Selection of Underfloor Heating Type
- Electric underfloor heating: It is recommended to use graphene XPS insulation boards in combination with an electric heating system. This system has high thermal conversion efficiency, with energy savings of 30% compared to traditional boiler-based underfloor heating. It also does not require the installation of boilers and other equipment, and its overall energy consumption is lower than that of air conditioners.
- Water underfloor heating: If a water circulation system is chosen, polystyrene boards or polyurethane insulation layers need to be laid between the pipes and the steel plate to prevent rapid heat loss through the steel. At the same time, maintenance space should be reserved to prevent pipe damage due to vibration during container transportation.
3. Pipe Laying and Fixing
Lay the underfloor heating pipes or cables on the insulation layer according to the design drawings. Maintain a circular transition at the bends to avoid blocking the water flow or current due to right-angle bends. The pipe spacing is determined according to the heat load calculation (usually 15-20 cm). After fixing, cover them with special leveling materials (such as cement self-leveling) to ensure that the ground flatness error is ≤3 mm. Due to the limited ground space in container houses, it is recommended to use single-layer laying to avoid insufficient floor height caused by multi-layer stacking.
4. Temperature Control and Acceptance
Install a smart thermostat to monitor the indoor temperature in real-time through sensors and automatically adjust the heating power to avoid energy waste. After construction is completed, a professional pressure test is required: for water underfloor heating systems, the water pressure test pressure is the system static pressure plus 0.3 Mpa, and not higher than 0.6 Mpa. It is considered qualified if there is no leakage after holding the pressure for 1 hour; for electric underfloor heating, the insulation resistance needs to be tested to ensure grounding safety.
5. Adaptability Design
- Transportation adaptability: Choose graphene XPS insulation boards that can be slightly moved to prevent the boards from being damaged due to container vibration and causing the underfloor heating to fail.
- Overall insulation: Lay polystyrene boards and other insulation materials on the walls and roof simultaneously to reduce heat loss through the steel side walls and improve system energy efficiency.
- Ground elevation treatment: The thickness of the underfloor heating layer is about 8-10 cm. The height of the threshold needs to be adjusted or a slope transition needs to be used to avoid affecting daily use.
Notes: The service life of container underfloor heating systems can reach more than 50 years, which matches the 15-20 year living cycle of houses. Such solutions have been widely used in overseas mobile homes, outdoor B&Bs, and other scenarios, but it is necessary to strictly follow construction specifications to ensure safety.
