The following conditions can be done by you at your own discretion in your home:

• • Cat hole (Floor convection) and/or
  • Sliding air vents under the ceiling (Ceiling convection) are a piece of traditional Thai wisdom that has been passed down through generations.
  • The use of underground cooling pipes is also widely promoted in various media, both domestically and internationally.

However, the rights according to the NPH patent, registration number 2403003429, which is protected by intellectual property laws, pertain to the use of underground cooling pipes connected to Air Flow Block energy-saving brick walls in the Natural Passive House system.

Want to have an NPH home?
The process is simple:

1. 1. Contact us and specify your needs
   2. We will calculate and design the system
   3. Provide consultation and proceed with implementation
   4. Follow-up and inspection
   5. Issue NPH home certification