Another high efficiency furnace installation by Verne & Ellsworth Hann and another customer who is happy with the quality of his new system as well as the professionalism used during the project. But what is the gray material on the supply ductwork on the right? We are getting that question more frequently. And it all has to do with efficiency and the building code enforced by the municipality in which you live.
As national building codes become more diligent about efficiency in all phases of homebuilding additional scrutiny is given to even the smallest facets. In this particular case the focus is on even the most minimal air leakage from the return air ducts to the furnace. In essence, if every seam and connection of the return ductwork in completely sealed, then there will be no air drawn in from the basement. The system becomes more efficient. Efficiency translates into less energy consumed and more energy dollars saved.
Most energy-conscious and code abiding installers seal ducts with a gray mastic. Gray because it’s close in color to sheet metal. Mastic is a pliable material that goes on soft and then hardens. it’s applied liberally in order to ensure it gets worked into all of the air gaps in the seams and joints.
To be clear, National Building Standards are often adopted by state building codes which, in turn are adopted by local municipalities. Not all municipalities enforce all of the codes. That is up to the discretion of that particular building department.
But, as the push towards greater efficiency increases, more municipalities are demanding compliance from the contractors who perform work in their cities.
Verne & Ellsworth Hann is up to speed with all of the building codes in all of the municipalities in which we work. As an educated consumer seeking multiple estimates for a new HVAC project, you need to be asking your contractor about his code compliance awareness and history.
For a more detailed reading of the building code as adopted from the Ohio Mechanical Code by the Board of Building Standards you can read the complete code standard chapter 4101:8-16-01 on Duct Systems here. Paying particular attention to sections 1601.4.1 through 1601.4.7 on joints and seams.
That’s a lot of detailed information to digest in order to understand why the installer is painting a gray substance onto the new ductwork of your new high efficiency furnace.
But rest assured that Verne & Ellsworth is familiar with all codes in all municipalities.
- Charles S.( Cleveland Heights, AC Installation July 2017 )
Excellent and prompt service. The workmen were professional and helpful in their explanation of care and service of the equipment.
- Sondra S.( Shaker Heights, Air Conditioning Installation July 2017 )
I want you to know how pleased I was with the entire experience. From the initial meeting with Chris through the installation of my new A/C unit.
- John S.( Cleveland, Air Conditioning Installation, June 2017 )
Installers were spot on time at 8 am, took care not to track dirt into house, and were both courteous and friendly. Excellent quality work to boot!
- Mike C.( Shaker Heights, Heating and Cooling, June 2017 )
I have had several projects from Verne & Ellsworth, across boiler replacements, heating system installation, and air conditioning system set up and install. Each of these times, Bill Hann takes a ton of his time to talk to my wife and I to learn about the issues we’re having, explain the root causes of those issues, and suggest fixes that we know will prevent the issues from coming back – not just paper over the issue temporarily. Lastly, he always delivers on time – onsite when he says he will be, fishing when he says he will – and always makes sure every aspect of the job is completed, from material removal and set up, to equipment install, to clean up after the project. A++ and highly recommended!
- Michelle T.( Wickliffe, Furnace & Air Conditioning Installation, June 2017 )
The unit is working very well. The installers were very professional, showed me how everything worked, and cleaned the basement beautifully. I would never have even known they were there. Thank you again.