Energy Efficient New Home Construction

Our New Home Construction Methods Create Energy Savings

You can’t read an article online or see an advertisement for a product without it mentioning energy efficiency. In today’s market, buying energy efficient appliances, vehicles, lighting, etc., is an important decision consumers are making when purchasing a product. This is no different when it comes to building a new home – especially in Wisconsin where winters are harsh and summers are hot!

With decades of experience as a Wisconsin Home Builder, every Demlang home is built with energy efficiency top of mind and is Focus on Energy HERS (Home Energy Rating System) rated. This means we are constantly working towards building the most energy efficient homes and implementing the latest in technologies to do so. With a more energy efficient home, it not only reduces the amount of waste output from your home, but puts money back in your pocket for years to come – on average about $600 in energy savings per year.

Building comfortable, family-friendly homes that cut down on high energy costs.

Energy Testings and HERS Ratings

The HERS index is a nationally recognized system for inspecting and calculating a home’s energy performance. Homes are rated on the HERS scale from 0-150. The lower the HERS score, the more energy efficient your home is, thus saving you more money.

The typical existing home on the market – with leaks, drafts, and inefficient appliances and mechanicals can rate around 130 while the average new home usually scores about 60-75 on the scale. At Demlang Builders we are not average, our homes score in the 50’s – which means your energy savings and comfort will be maximized in your new home.

You can learn more about the HERS index by visiting, or simply ask a member of our team.

Home Energy Scale

Demlang Energy Efficiency Scale
Demlang Energy Efficiency Scale

The Demlang Energy Savings System

Energy savings don’t cost more! The “Demlang Energy Savings System” comes standard with each of our homes, meaning these energy cost savings are built-in with the standard pricing of your new home! This includes:

Computer Modeling

Ensures no stone is left unturned, looking at the entire home to determine energy efficiency savings opportunities.

Blower Door Test

To determine just how leaky the house may be, and to locate air leakage locations throughout the home.

Infrared Scanning

By itself and in conjunction with the blower door test, infrared scanning allows us to locate cold spots and air leakage points or insulation flaws in hidden locations.

HVAC Airflow Testing

We measure supply and return airflows from the furnace (if this is how your home is heated) to ensure that the system is reasonably balanced.

Ventilation System Testing

It is important to recognize that airflows from ventilation equipment can be a large factor in the home’s ability to expel moisture/odors from the home.

Duct Tightness Testing

Duct blaster testing if any ductwork is located outside a conditioned space or other compliance objectives.

Hot Water Heater Power Vent Testing

To ensure there is no risk of backdraft and that exhaust gases escape properly, we test the hot water heater vent fan.

Spray Foam Insulation

Creates an air tight seal in nooks and crannies that may be exposed with traditional insulation, we ensure spray foam meets our standards.

Air Ceiling Construction Detail

Prevents air loss and reduces risk of moisture damage, even the design of the roofing system and ceiling details can make a difference.


Automatically regulates the humidity in your home, helping you control comfort levels leading to more effective heating and cooling.

Ceiling Fan Locations

Electrical packages come standard with fan boxes in many locations throughout the home, allowing you to add ceiling fans where desired.

Certified Third-Party Inspection

Each home is reviewed by a third-party inspector to make sure it meets the highest standards of energy efficiency.

Check out our lots for sale to find your perfect home location.