New York City skyline; HR40
Our History
Strong Enough For The Empire State Building - Elegant Enough For Your Home

A Serious History

Sometimes you have to look back to go forwards.

And when we were designing the HR40 Window, that’s exactly what we did.

As a company, our aim was to create the most energy efficient window we possibly could. We didn’t have to look far – we already had an excellent meter for success:The Empire State Building.

In 2010 the Empire State Building underwent a complete glass overhaul, a cooperative venture between Serious Glass and Johnson Controls Inc. The new windows that would be replacing the old double-pane Argon-insulated windows would boost the efficiency rating of the Empire State Building’s glass from R2 to R5-R8, a truly astronomical spike.

HR40 Bay windows in the living room

“Sometimes you have to look back to go forwards”

When we saw what Serious Glass could do for the Empire State Building, we knew we wanted to put that technology in the hands of homeowners.

So our brightest minds sat down with the Serious designers and put their heads together to craft the HR40 Product Line – a newer, more powerful, residential version of the glass that is now found in the Empire state Building.

Skyscrapers with HR40 windows

What Efficiency Means To Us

We are passionate about efficiency. In a world where we waste more and more every day, where excess is normal and bigger is always better, we choose to take the road less traveled.

It just so happens that a lot of people have been looking to take that road as well, but don’t know how.

A commitment to superior efficiency is a commitment with several different parts, each important in its own way. With every HR40 window we make, we make three separate little promises to you and your home.

  • We Promise Quality: Putting your home’s integrity, style and health over what’s cheap or easy.
  • We Promise Economy: Investing in better technology benefits your savings account in the long term, and adds value to your home.
  • We Promise A Better Environment: Reducing our carbon footprint leaves our world greener and more verdant for our children.

Chuck Wetmore; Designer, HR40 Windows & Project Coordinator

Origins of HR40 Windows. “Homeowners would be crazy to buy anything else.”

R-Value and U-Factor

What Is R-Value and U-Factor?

Windows use two ratings to determine their energy efficiency. R-Value and U-Factor. U-Factor measures how well a product prevents heat from escaping a home or building. This is a great way for rating how well windows keep heat in during the winter, but doesn’t necessarily work as well for evaluating how houses keep cool in the summer.

Enter R-Value – which is a measure of heat conductance, which measures the resistance to heat transfer. In the case of your home, the goal is always an attempt to resist heat transfer, whether it means resisting transfer from inside out, or outside in.

While U-Factor values are rated on a scale of 1.3 to .20 (or thereabouts) where the smaller numbers are more desirable, R-Value is rated on a scale of R1-40, with higher coefficients being more efficient. Products with high R-Values( R15 and upwards), are assigned to static areas that don’t involve moving parts, or direct contact with the outside climate. Interior attic insulation, for example, may have an R-Value of R30.

When it comes to windows and doors, R-Values assigned typically range from R1 (poor) to R7(Amazing!) and at R5, HR40 windows compete with the real rockstars of the industry. To give some perspective, the Serious Glass windows in the Empire State Building insulate at an R-Value of about R7 at 1,200 feet high!

Mouse-over the images below to Learn More

  • Standard double pane window

    Standard Double Pane

    Most premium double pane windows come with either a low-e coating or argon-filled spacer. Argon based windows use dense Argon gas to restrict the flow of heat into and out of the house. This can offer your home anywhere between an R1 and R3 insulation rating. However, in many cases, standard windows come with no insulation whatsoever, offering essentially no insulation at all.

  • HR40 double pane windows

    HR40 Double Pane

    HR40 products on average have at least an R5 rating for insulation, offering up to 40% more insulating power than a standard argon-insulated window. The construction of the HR40 allows it to better retain the internal climate of the home and eliminate condensation creation around the framing, while still allowing the maximum amount of light through the window. The Heat Mirror film, Intercept spacer and Krypton gas all work in tandem to give you an unparalleled efficiency rating.