Metal Roof Energy Savings Calculator

To calculate approximate energy savings offered by a cool metal roof architects are instructed to input the building s location proposed roof r value roof reflectance and emittance base energy costs equipment efficiencies electrical demand.

Metal roof energy savings calculator.

Developed by the u s. For a more in depth roof savings measurement check out the oak ridge national laboratory s comprehensive roofing savings. Department of energy s oak ridge national laboratory version 1 2 this version of the calculator is for small and medium sized facilities that purchase electricity without a demand charge based on peak monthly load. Please remember the energy savings that can be achieved with reflective roofing.

Keep in mind these numbers will vary based on location and utility costs but still offers a good representation of how cool metal roofing with a high solar reflectance can help a consumer save on their energy bills. Even at r50 cool roofs can produce a measurable cooling energy savings compared to a low albedo roof even if it comes without a noticeable difference in comfort for the occupants. Although there are inherent benefits in the use of reflective roofing before selecting a roofing product based on expected energy savings consumers should explore the expected calculated results that can be found on the department of energy s cool roof calculator. Unlike some energy modeling calculators which are limited to steep slope residential roofs with attics ornl s tool models the typical low slope commercial roof with insulation placed directly over the deck and under the roofing membrane.

Companies or individuals seeking to use the roof savings calculator for commercial purposes should contact ornl s technology transfer office regarding licensing opportunities. Link between energy savings and emissivity. Metal roofs are probably the most expensive first cost cool roof solution but they also have a favorable life cycle cost which shouldn t be ignored. Environmental benefits of a metal roof in additional to tangible savings on the costs of energy maintenance and repairs a metal roof offers important benefits for the environment.

The roof savings calculator web service is no longer available. Solar reflectance is the most important characteristic of a roof product in terms of yielding the highest energy savings during warmer months. Particularly standing seam panels are most recommended if you plan to go solar. For homes in warmer climates pre painted or granular coated metal roofing systems reflect solar energy and cool your home by re emitting most of what solar radiation is absorbed.

Estimates cooling and heating savings for flat roofs with non black surfaces. Cool roofs can save money several ways including energy savings rebates and incentives hvac equipment downsizing and extended roof lifetime. The basic unpainted metal roof will reflect more solar radiation than an asphalt roof which absorbs and holds heat. First and foremost a metal roof lands itself ideally to solar panel applications.