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During the summer it absorbs heat, keeping the building cool and comfortable.
During the night it discharges heat preparing the building for the next day.




as a



Summer Heat absorbed

Summer Heat Released

In winter, this same thermal mass can store the heat from the day, heaters or
sun to release it at night, reducing the need for mechanical heating.






Winter Heat absorbed

Winter Heat Released


Increase Comfort

Reduce Energy Costs

Appropriate use of thermal mass throughout your home or building can make a big difference in comfort, heating and cooling bills. Proper use of thermal mass moderates internal temperatures by averaging day/night extremes.

air graph colored
Figure 1E

Continuous Insulation

Thermal mass is not a substitute for insulation but a valuable benefit when insulated properly.

By insulating the exterior, you take advantage of the decorative feature of the masonry and maximize the thermal mass benefit within the living space.

If the masonry decorative side of the wall is desired on the exterior surface of the building, the SunTerra EnergyBlock can be turned and the continuous insulation applied to the interior.  This continuous insulation method eliminates the condensation problems with other insulation systems, while improving insulation R-value.

SunTerra EnergyBlock is high thermal mass building construction. A typical home built with concrete floors and EnergyBlock exterior walls will store 50,000 BTU's of heat within just 1° Fahrenheit interior temperature change. This can provide multiple days of required stored heat and keep interior temperature within the occupant's comfort range.

Light Heavy Construction1

Optimize passive solar heat gain without creating excessive interior heat buildup.

Enhance the use of wood stoves by evening out inside temperature swings, store more energy for the morning, improve efficiency and comfort.

Take advantage of off-peak utility rates by heating your home during the low rate time to store heat for when the electrical rates are of higher expense.

Improve the efficiency of heat pumps by operating them during the warmest time of the day when they are the most efficient and store that heat to be used at night when the pumps lose efficiency with a minimum variation of inside temperature.

Reduce or eliminate the need for mechanical air conditioning.