PCM Wallboard is a building material embedded with phase-change materials (PCMs) that absorb and release thermal energy to moderate indoor temperature fluctuations. These wallboards typically contain paraffin wax or salt hydrate compounds that melt and solidify at specific temperatures, usually between 18-26°C (64-79°F), storing and releasing latent heat to reduce heating and cooling demands.
Technical Specifications
PCM wallboards contain 5-20% phase-change material by weight, with thermal storage capacity of 100-200 kJ/kg. Standard gypsum-based wallboards integrate PCM microcapsules to prevent leakage. Products are typically 12.7mm thick and meet fire ratings including ASTM E84 Class A requirements.
Building Applications
PCM wallboards reduce peak cooling loads by 10-30% in commercial and residential buildings. They are most effective in climates with significant daily temperature swings and moderate HVAC systems that can capitalize on delayed cooling peaks.
Energy Impact
By shifting energy demand away from peak hours, PCM wallboards lower utility bills and HVAC equipment sizing requirements. They improve thermal comfort by reducing temperature swings of 3-5°C without increasing system runtime.