Frequently Asked Questions

A blower door is a diagnostic tool to determine a building’s airtightness. By measuring the extent to which air can flow into and out of a building, the blower door makes it possible to quantify a building’s airtightness. The test is performed by hanging the blower door frame in a doorway and attaching the door panel to the frame. Once the door panel is sealed, the blower door fan is turned on, and the pressure within the building is monitored. The extent to which air can flow into or out of the building is then calculated based on the change in pressure. Blower doors are essential for diagnosing building tightness and ensuring that homes and other structures are adequately sealed.

The test provides valuable information about the building envelope’s ability to resist air leakage, which can lead to energy loss, drafts, and other problems. In addition, the results of the test can be used to determine where air sealing and/or insulation improvements are needed.
While a blower door test is not required by code, it is highly recommended for new construction and major renovations. The test cost is typically around $500, but can vary depending on the size and complexity of the building.

A blower door test is a diagnostic tool used to assess the airtightness of a building envelope. The test involves mounting an airtight frame with a calibrated fan in an exterior door opening. The fan is used to pressurize or depressurize the interior of the building, and the resulting air movement is measured to determine the airtightness of the building envelope. The test is repeated at different pressures to ensure accuracy.

A blower door test typically takes about two hours to complete. The time required can vary depending on the size and type of home, as well as the experience of the technician performing the test. However, most homeowners can expect the entire process to take no longer than half a day.

The answer is no. You should not be inside the house during a blower door test. The test involves sealing all doors and windows, then running a large fan in the front door. This depressurizes the house, which makes it easier to find air leaks. If you were inside, the fan would suck the air out of the house, and you could be seriously injured.

This depends on how well your home is insulated and air sealed. If your home is not well insulated or has a lot of leaks, it can be quite difficult to pass a blower door test. However, if your home is well insulated and airtight, it should be relatively easy to pass a blower door test. Either way, it is always a good idea to consult with a professional energy auditor before attempting to perform a blower door test.

A good blower door test score meets or exceeds the standards set by the American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE). The standard for a residential dwelling is a score of 7.5 or less. A score of 5.0 or less is considered to be excellent.

Yes, energy audits are definitely worth it! Here are three reasons why:

1. Energy audits can help you save money on your energy bills.

2. Energy audits can help you find ways to reduce your carbon footprint.

3. Energy audits can help you improve the overall efficiency of your home or business.

1. Whole-house/building energy audits

2. Systems energy audits

3. Equipment energy audits

An energy audit is an inspection, survey, and analysis of energy flows to reduce energy costs and consumption. It covers all forms of energy used in a facility, such as electricity, natural gas, oil, water, and solar.

The auditor will first assess the energy usage of the facility to identify where there are opportunities for energy efficiency improvements. They will then recommend measures to reduce energy consumption and costs. These measures may include installing more efficient lighting, heating, and cooling systems, or improving the insulation of the building.

An Energy Audit will test the energy efficiency of your home, and make recommendations for improvements. The auditor will look at your home’s:

-Heating and cooling systems


-Windows and doors




-Water heating

-Other factors that affect energy use

The answer to this question depends on several factors, including the climate, the type of building, and the purpose of the ductwork. In general, however, it is generally accepted that a duct system should not have more than 10% leakage.

Duct leakage testing is performed to measure the airtightness of HVAC ductwork. This type of testing is important because leaks in the ductwork can lead to decreased efficiency of the HVAC system, as well as increased energy costs.

To perform a duct leakage test, a fan is used to pressurize the ductwork and a calibrated manometer is used to measure the pressure differential across the ductwork. The test is typically conducted at two different pressures, typically -0.1 and -0.4 inches w.c. (water column).

The results of the duct leakage test are reported as a CFM (cubic feet per minute)

To check for duct leaks, you will need to do a few things. First, you will need to make sure that all of the registers in your home are clean and unobstructed. Next, you will need to inspect all of the ductwork in your home for any signs of damage or leaks. Finally, you will need to test the ductwork for air tightness.

If you find any leaks in your ductwork, you will need to repair them as soon as possible. Leaks in your ductwork can lead to a loss of heating and cooling efficiency, and can also lead to higher energy bills.

If you have a leaky duct, the best way to fix it is to seal the leaks with mastic or metal tape. You can also use a sealant that is compatible with your duct material. Once you have sealed the leaks, make sure that the area around the duct is well-ventilated so that the mastic or tape can dry properly. Consult with our team at LSEE and we will help determine if the leak is repairable.

Most products that have earned the ENERGY STAR label are certified for a period of two years. Some product categories have different certification periods. For example, computers and monitors must be recertified every three years to maintain their ENERGY STAR status.

To earn the ENERGY STAR label, a building must perform in the top 25 percent of similar buildings nationwide for energy efficiency and meet strict energy efficiency performance standards set by the U.S. Environmental Protection Agency (EPA). ENERGY STAR certified buildings use an average of 35 percent less energy than typical buildings and generate 35 percent fewer greenhouse gas emissions.

To be ENERGY STAR qualified means that a product meets or exceeds the energy efficiency guidelines set forth by the Environmental Protection Agency (EPA). Products that are ENERGY STAR qualified use less energy, which can save you money on your energy bill and help reduce your impact on the environment.

HERS raters are certified professionals who conduct on-site evaluations of homes to assess their energy efficiency. The goal of a HERS rating is to provide homebuyers with an accurate estimate of a home’s energy performance, as well as recommendations for improving the home’s energy efficiency.

HERS raters are professional energy auditors who have been trained to evaluate a home’s energy efficiency. There are approximately 4,000 HERS raters in the United States. HERS ratings are becoming increasingly popular as more and more homeowners look for ways to save money on their energy bills. A HERS rating can help a homeowner understand where their home is wasting energy and what improvements can be made to increase its efficiency.

The Home Energy Rating System (HERS) is the most widely used residential energy efficiency rating system in the United States. Developed by RESNET in 1995, HERS provides a relative measure of a home’s energy efficiency and carbon footprint compared to a reference home designed to meet minimum building code requirements. The lower a home’s HERS Index Score, the more energy efficient it is in comparison to the reference home.

A HERS test can take anywhere from a few hours to a full day, depending on the size and complexity of the home. The number of rooms, the layout of the home, and the type of heating and cooling system all play a role in how long it takes to complete a HERS test. In most cases, a HERS test can be completed in one day. However, if the home is large or has a complex HVAC system, it may take longer.

A good HERS score will vary depending on the climate conditions of the home’s location. In general, a score below 50 means that the home is more energy-efficient than average, while a score above 100 means that the home is less energy-efficient than average. A typical new home has a HERS score of around 85, while a typical resale home has a HERS score of around 115.

The answer to this question is not as simple as a yes or no. A higher HERS rating does not necessarily mean that the home is better insulated or will be more comfortable than a home with a lower HERS rating. The HERS rating measures the energy efficiency of a home, and the higher the number, the less energy efficient the home is. However, many other factors contribute to the comfort of a home, such as the size and layout of the rooms, the type of windows and doors, and the quality of the construction. In addition, the HERS rating does not take into account the climate in which the home is located.

The International Energy Conservation Code (IECC) is a model code produced by the International Code Council. It establishes minimum requirements for energy efficiency in new and renovated buildings. The IECC has been adopted by most U.S. states and local jurisdictions as the energy code for new construction and major renovations of residential and commercial buildings.

The International Energy Conservation Code (IECC) is a model code produced by the International Code Council (ICC). It provides minimum requirements for energy-efficient building envelope design and thermal system sizing in order to achieve greater energy savings in residential and commercial buildings. IECC standards are adopted by states and local jurisdictions as part of their building codes.

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The IECC is a model code produced by the International Code Council (ICC) that provides minimum requirements for energy-efficient building design and construction.

The IECC is designed to be adopted and enforced by state and local jurisdictions as a means of achieving compliance with federal energy efficiency standards. The code is updated every three years through a consensus-based process involving representatives from a variety of stakeholders, including builders, code officials, architects, engineers, and manufacturers.

The answer to this question depends on the specific location within the state of Texas. The majority of the state is under the 2012 International Energy Conservation Code (IECC), with a few exceptions. Some jurisdictions have adopted the 2015 IECC, and a handful of others have chosen to remain on an earlier code version.

The International Energy Conservation Code (IECC) is a model code developed by the International Code Council (ICC). It is the most widely used code for energy efficiency in buildings in the United States. The IECC is adopted by states and local jurisdictions, typically as part of the building code.

Information Bulletin 167 is a public information document released by the City of San Antonio. The document provides an overview of the city’s regulations concerning the operation of businesses within its jurisdiction. It includes information on business licenses, zoning requirements, and other permit requirements. Information Bulletin 167 is available online at the City of San Antonio’s website or at local libraries.

The 2018 IECC/State of Texas energy codes have four energy conservation compliance options.

Three of the compliance paths require meeting certain mandatory provisions of the 2018 IECC, while the fourth path uses RESNET allowed by the State of Texas. Depending on which energy compliance you choose, it will determine what kind of inspections need to be added for your building permit. The Residential Energy Compliance Form (2018 IECC) is linked to Information Bulletin 167 and can be completed online as a pdf to pass those checks.

If you are a licensed general contractor in the state of Texas, then you are required to complete the IB 167 inspection for any building projects that you undertake. The IB 167 inspection is a comprehensive examination of the construction site and all of the associated buildings and structures. This includes an assessment of the condition of the property, the safety of the workers, and compliance with all applicable building codes and regulations. The purpose of the IB 167 inspection is to ensure that the construction project is safe and compliant with all relevant laws and regulations. If you are found to violate any of the requirements of the IB 167 inspection, you may be subject to disciplinary action from the state of Texas.

This Information Bulletin (IB) 167, which was originally created as a customer service project by the Development Services Department (DSD), has been re-written to meet the requirements of the 2018 International Energy Conservation Code (IECC). The Information Bulletin has been updated to clarify requirements for Additions, reference BuildSA for submittal of the Residential Energy Compliance Form (Form), and incorporate a change in methodology for calculating energy consumption.

Not every building in San Antonio needs to be IB167 compliant, but all new construction and major renovations must meet the requirements outlined in the International Building Code (IBC). The IBC is a model code that provides minimum standards for the design, construction, alteration, and repair of buildings and structures.

ENERGY STAR qualified products must meet strict efficiency guidelines set by the Environmental Protection Agency (EPA). These products are independently verified to save energy without sacrificing features or functionality.

Certified products must also meet specific efficiency criteria, but they are not required to be ENERGY STAR qualified. Certification programs vary by product type and region, but they typically involve rigorous testing to ensure that products meet certain energy-efficiency standards. Some certified products may also be ENERGY STAR qualified.

To become ENERGY STAR certified, your product must meet certain energy efficiency criteria set by the EPA. The process begins with an application followed by a review of your product’s energy use and performance data. If your product meets the necessary requirements, it will be awarded the ENERGY STAR label.

Reach Out To Our Professionals

Carolyn Tisdale
Carolyn Tisdale
October 30, 2022.
Our home energy audit went great! The duct leakage test showed one of our systems was leaking. Clay was friendly and so knowledgeable about energy efficiency.
Mark Armand
Mark Armand
October 26, 2022.
The City of San Antonio requires IB167 so we called Lone Star Energy Efficiency to help us out. The whole process was simple and easy.
Jennifer Castle
Jennifer Castle
October 24, 2022.
We had a great experience working with Lone Star for our new home construction. Call Lone Star for your blow door testing and energy efficiency needs because they were very knowledgeable about the entire process.
Clinton Justus
Clinton Justus
October 23, 2022.
This company is professional and great to work with!
Linda Burgess
Linda Burgess
October 21, 2022.
Lone Star helped us with an IB 167 inspection. Clay came out and performed a blower door and duct leakage test for us. We received the paperwork quickly. I recommend this company 100%.
Jesse Wilkins
Jesse Wilkins
September 25, 2022.
This company is professional and great to work with!
Carl Bain
Carl Bain
September 8, 2022.
Lone Star came out to do a blower door test and duct leakage test on my home. It was quick and easy. I appreciate the service.
Anne Vincent
Anne Vincent
September 6, 2022.
This is a really great company. They were able to come out and do an evaluation of our home. Clay did a blower door test and found all the places where air was leaking. By doing the relatively minor repairs and weatherization Lone Star recommended our whole house feels cooler without having to replace our HVAC ! I was sure we were going to have to replace it because it wasn't keeping up. Turns out it can keep up now! Not only that, but on the new construction project we are considering Clay was able to look at the plans and specs and do an audit to make sure that our investments for the future would not only meet the codes but would also would help us save money on the bills long term. This is a company that puts money back in your pocket over time and I love that. Working with them was a great decision. We saved money, protected our investment in our home through knowledgeable repairs, were able to make informed decisions about our future energy use, and reduce our impact on the planet. It was easy to schedule. Clay was dependable about scheduling and budget, he was friendly and at no point was it uncomfortable to have them in the house. The business is family owed and they were just lovely people. THREE CHEERS FOR LONE STAR!
Brett Owen
Brett Owen
September 6, 2022.
So easy to work with and great communication! Clay was on time and friendly. He helped me diagnose an issue with our water heater and find a more energy efficient one. The job was done in no time.
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