SkyLouver System Design

SkyLouver is delivered as a complete system with modules, piping, pump package and controls custom designed for the target building. 

The system design philosophy values modular and pre-integration of components to enable rapid deployment and reduce installation costs:

  • The module is shipped completely pre-integrated and pre-flashed, ready to install directly into the roof opening with only a minimal amount of fasteners and sealing.
  • All module interconnect piping and cabling is provided with the installation kit, and is installed using push-to-connect or pressed fittings that do not require highly skilled mechanical installers.
  • The pumps, heat exchangers and fluid management components are packaged in a skid-mounted unit called the Thermal Management Unit (TMU).
  • The TMU is pre-wired so that only one three-phase electrical service line need be connected to the system.
  • Thermal storage tanks are shipped on flat pallets and are easily constructed on-site.
  • Lighting control relays are wirelessly activated, and are compatible with any existing lighting system.

The cost effectiveness of a SkyLouver installation is dependent on a number of factors, including the load profile of the building, its siting characteristics, the local climate, utility cost and rebate environment. A properly designed SkyLouver installation can contribute up to 15 LEED credits for energy performance, on-site renewable energy, and daylighting.

SkyLouver has been designed to make the process of siting and installing the system a straightforward and low-cost procedure. Below are some of the features of the SkyLouver system that facilitate installation.

Module Design

SkyLouver modules are designed to be lightweight and self-contained to minimize the number of installation steps that are required on site. Through careful selection of materials and sizing, a full-size 8′ x 5′ SkyLouver skylight weighs less than 250 pounds. This greatly facilitates the installation process because cranes are not required to move the modules at every step. SkyLouver modules do not require a separate curb to be installed on the roof to which they are to be mounted. The modules are designed to be deck mounted and self flashing. This means that each module comes with roofing membrane material pre-installed and securely waterproofed around the bottom edge. Once the opening in the roof has been made it is only necessary to secure the module to the roof deck with screws, and then to seal the edge of the flashing provided with the module to the roof surface. Once the module is physically installed and secured, the fluid connections tightened and the low voltage wiring is connected.

Thermal Balance of System Installation

All of the piping and insulation required to make fluid connections between the modules is provided in the SkyLouver installation kit. The rooftop piping arrives in pre-insulated sections that are sized for the layout of the modules. Fluid connections are made with solderless fittings to improve safety, reliability, and maintainability. The pumps, heat exchangers, valves, expansion tanks, and other fluid components arrive on a pre-integrated skid mounted unit called the Thermal Management Unit (TMU). The TMU can be installed either in available space in the existing mechanical room or in an outdoor location behind the building. The unpressurized thermal storage tanks arrive on a flat pallet and are assembled onsite.


Each module of the SkyLouver system has a small controller board to read its local sensors and control the position of the louvers and its thermal control valve. The modules are mostly self-sufficient but a central controller is needed to provide supervisory control, data logging, and external communications. The central controller is a small single board computer mounted on the TMU, where it also controls the pumps and valves.