Project Features

Bathroom Remix

The balancing act is done by applying the knowledge of different options of hot water systems, new technology, and intelligent design.

By balancing these areas and taking into account all of these aspects, the design has been narrowed down and chosen for the best fit of this project. A focus of the system is to be efficient concerning the length of the water runs. The modified building layout plans accommodate the hot water system to be the most efficient with piping lengths to conserve hot water energy loss.

Fresh Air - 24/7 - we never close

One of the first options considered was to install a separate whole-house ventilation system with dedicated ducts. This was found to have a significant high first cost due to the additional material and labor required. As a result of this, additional options were sought after to reduce the install cost, as well as the operating cost with energy efficient features.

Hygrothermal Peace of Mind

When checking the condensation risk of this assembly under steady-state conditions during winter months as required by German standards, we noticed that when we have an exterior temperature below 20°F and an interior relative humidity above 35%. This is significantly lower than the 50% required by German standards, which would trigger interstitial condensation at the OSB board. Now, it is still debatable if 35% interior humidity under cold weather conditions with more or less continuous heating is a reasonable long-term interior condition.


The usage of PEX lines in the hot water system improves the labor productivity tremendously, rather than using traditional plumbing approaches.

The linear feet of tubing is more than traditional plumbing lengths, but the overall cost is reduced because the labor is so simple, especially with production building. The two different PEX tube diameters used are ½” for showers and the washing machine and ⅜” for all others.

Thermal Bridge Free Design

Thermal bridges can account for more than 10% of the total losses for a typical façade segment. While these analyses were performed using THERM 7.3., REMrate in comparison, which was used for our energy analysis does not directly account for thermal bridges in such detail, although these bridges will have an impact on energy performance.