-article by Sam Myers, Retrotec
Reducing air leaks in duct systems plays an essential role to ensure efficient HVAC system operation. This keeps operating costs down and occupants comfortable. The duct tester equipment used to test for air leaks in duct work is made up of a calibrated fan, high precision manometer, tubing to connect the manometer to the fan, and flexible duct to connect the duct tester to the HVAC system. The technology applied to commercial duct testers has greatly improved over the past decade. What used to be a large blower bolted to a wheeled hand truck can now be easily carried by one worker in a case with a shoulder strap; all without sacrificing power. However, even with some of the most powerful duct testers out there, more fan power is needed for extremely large HVA
Yes, according to this high-performance builder, who uses it to constantly raise the quality bar
This is the 6th installment of a monthly column from Ben Walker, Co-CEO of Retrotec. Ben's column focuses on observations on the art and science of high-performance building and home testing.
Home builders are using blower doors
to go beyond code compliance
With codes and high-performance construction programs requiring airtightness testing, a small but growing cadre of home builders have been purchasing t
Blower-door assisted load calculations are boosting profits and customer satisfaction and reducing risk for forward-thinking contractors.
If you've been following the latest industry buzz you may have heard of HVAC 2.0 (formerly Home Performance 2.0). It's a real game changer that every HVAC contractor in the residential market needs to check out. Here's why.
The “2.0” suffix suggests an improvement to the status quo. That's certainly the case here. HVAC 2.0 is a new, consultative sales process designed to help contractors close more business at higher ticket prices, by helping customers solve their real comfort problems. And it's structured so that the initial consultation can be done effectively by an entry-level sales tech.
Posted: December 09, 2019|Categories: Ben's Column|
This is the 5th installment of a monthly column from Ben Walker, Co-CEO of Retrotec. Ben's column focuses on observations on the art and science of high-performance building and home testing.
During my recent conversations with builders, remodelers and other industry pros I've been hearing more about an increasing change in homeowner expectations when it comes to home performance. The gist of it is that they have moved past concern about energy savings.
Industry and governments have worked hard to promote energy efficiency and people have come to expect it. Today, saying that you build an energy efficient home is like saying you build roofs that don't leak. The likely response will be "I should hope so." Howev
This is the 4th installment of a monthly column from Ben Walker, Co-CEO of Retrotec. Ben's column focuses on observations on the art and science of high-performance building and home testing.
Mention the phrase "Summer Camp" and most people conjure images of happy kids frolicking at a lake while learning fun skills with friends. What they don't realize is that there's an adult version that's just as fun and rewarding.
Posted: September 13, 2019|Categories: Energy|
Author: Sam Myers
Within the confines of the HVAC field, airflow behavior is one aspect that can be difficult to understand when it comes to proper duct system design and airflow measurement. The challenge of providing a visual display of an issue that is invisible to the naked eye is a regularity we face when working with clients, apprentices and students. Once a duct system is installed, we can use diagnostic tools such as flow hoods and duct testers to measure and expose air flow and leakage, then record our reading. We can also use thermal imagi
Starting in September of 2019, a duct leakage test will be required for all residential new construction homes that have ductwork outside of the conditioned space. This includes ducts located in vented crawlspaces, ventilated attics, and attached storage rooms that are not conditioned.
In many states, a certification of some type is typically required. However, in Virginia’s case, the tester’s ability to operate the equipment is to be determined by the AHJ (Authority Having Jurisdiction).
Luckily, Retrotec’s DucTester systems come with an online training module that provides the user with a Manufacturer’s Certification. This can be presented to building inspectors to provide proof that the tester is knowledgeable when it comes to testing ducts for leakage. This is unique only to the Retrotec brand of testing equipment.
A recent Retrotec webinar, “Duct Testing Best Practices,” walks through duct testin
This is the 3rd installment of a monthly column from Ben Walker, Co-CEO of Retrotec. Ben's column focuses on observations on the art and science of high-performance building and home testing.
As many as 30 million U.S. homes may have loose-fill attic insulation made from asbestos-contaminated Zonolite. Here's how to determine if a home has it and what to do if it does.
This is the 2nd installment of a monthly column from Ben Walker, Co-CEO of Retrotec. Ben's column focuses on observations on the art and science of high-performance building and home testing.
A blower door test, along with before and after load calculations of a leaky 1915 home, show the value of these technologies for remodelers and homeowners.
A lot has been written about making new homes energy efficient, comfortable and healthy. That's important, but as more communities with high-performance new homes become available, more owners of existing homes want the same benefits.
Just tightening up a home isn't enough, however. Homeowners want you t
Author: Sam Myers, Retrotec
When pressurizing a building with a blower door, did you know that extra tubing must be added to the Channel B side of your gauge if you are not using a Retrotec DM32? If this tubing connection is neglected, you will have a reading that is approximately 20% high due to the open Channel B port that is referencing the indoor pressure of 50Pa instead of the outdoor pressure. Therefore, the extra tube is needed to connect that port on Channel B to the outside so that it is referencing the outside instead of the pressure induced by the blower door.
However, the Retrotec