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Building Integrated Solar Forced Air (BISFA)
Heating Panels for Sunlit Wall & Roof Mounting

The most economical and most practical way to reduce your utility bills by 50-75% or more is by using free solar thermal energy to warm the air inside of your home or business.It’s also the most practical way for your family to personally reduce global warming and air pollution by reducing the amount of non-renewable fossil fuel consumption like gas, coal or oil.

Generating hot air from the sun’s energy is the most efficient, least costly way of transforming solar energy to domestic energy uses. It’s also an excellent way to reduce your family or business carbon footprint and reduce the effects of global warming. After designing five previous generations of high quality solar space heating collectors, ClearDome Solar Thermal has finally perfected the art of making free hot air from sunshine.

If you live in the states of Maine or Georgia you can take advantage of their solar energy rebate programs that refunds over 1/3 of the purchase price as a tax rebate on installed solar forced air heating panels (including our BISFA panels). These are the first states in the USA that have enacted rebate programs for solar forced air panels and we’re encouraging more states to include hot air panels in their solar rebate programs since heating air is 50-60% of most annual utility costs.

Each linear foot of our new Building Integrated Solar Forced Air (BISFA) Ultra Black heating panels will produce over 100 peak watts of heat energy, or 300 BTU’s at nearly 80% efficiency on a sunny day. This means that our eight foot long, 16” wide panel like the one shown above on the garage roof edge will produce well over 800 watts, or over 2500 BTU per hour of pure peak heat energy from the sun. Compared to our previous 24” x 8’ long fourth generation metal framed Exterior panels, the BISFA panels will increase incoming cold air temperatures by over 60 degrees F, or 15 degrees hotter during midday sunny heating.

So if the incoming room air temperature is 60 degrees F, the panel heat out temps will rise to over 120 peak degrees. And if a second 8’ long BISFA panel is connected in series, the heat out temperature will increase another 165-180 degrees F, so a more powerful fan should be used to send more heat into the room.

BISFA Ultra Black panels can generate hot air for less than $1 per usable watt, based on the purchase price of the installed heating system. Once you’ve received payback of your solar air heating system in a few years or less your annual solar heating savings will increase each year as conventional energy becomes more scarce, causing it to rise more and more. The price of using the sun as a fuel source will always be free and abundant.

Browse the Internet and compare the price and efficiency of our 80% efficient hot air panels to typical 13% efficient solar electric (PV) panels that cost an average of $9 per installed watt, and you’ll see why taxpayer funding and mounds of government red tape is needed to be able to afford a $20,000 rooftop PV array that makes enough electricity to power a hair dryer.

Now you know why solar PV electric is impractical for heating your home. It’s just too expensive.

Each of our 8 foot long large BISFA heating panels will increase room temperatures by 10-15 degrees F or more, on all sunny days in well-insulated 500 square foot rooms with 8’ ceilings. So to make a 1,000 square foot home feel much more comfortable, even on partly cloudy days, you would normally only need two panels, or add another to boost the heat even more—especially if you live in a less sunny or sub-zero location. The more air heating panels you install, the faster heating and warmer your home will be, and will remain warm well into the night. For smaller rooms or limited wall space, use our 4’ or 6’ panels. The 4’ panel is perfect for small 100-150 square foot closed rooms, and the 6’ panel works well in 250-300 square foot rooms with 8’ ceilings.

Specially configured for wall, awning, stand-alone, or roof installations-especially for 16” standing seam metal roofs.

All day solar warmth that’s been absorbed by the furniture, walls, floor and ceiling, is radiated back into the room long after the sun sets, helping you save lots on conventional heating costs. Our solar forced air heating system is not designed to be connected to existing heating systems. When enough panels are installed on south facing walls or roofs, you’ll normally only need to add conventional heat late at night and early in the morning, unless you experience consecutive overcast days. Cold outside air has very little effect on solar heating with our panels.

Durable weather and heat resistant panel construction Our standard 4, 6 or 8 foot long panels are industrial grade and made of sturdy custom-formed 16 guage aluminum with a tough, baked-on black powder coating. We suggest using a contractor, solar installer, qualified handyman or HVAC installer for mounting the panels. The 8’ panel installation shown below is mounted on the top edge of a clear polycarbonate awning, with a solar PV panel on the right side to power the panel’s 12 volt fan. We now have custom panel mounting brackets available to mount the panel as an awning, for flat roofs or temporary ground use.

The clear front side glazing is unbreakable heat and UV resistant 1/8” thick, non-toxic clear polycarbonate plastic and our top-rated selective surface Ultra Blackflex 95% absorption, .05 emissive solar heat absorber is the same as our previous Low Profile UB panels seen on the right (now replaced by the BISFA heating panels). And we’ve been able to squeeze out a few more degrees of heat by further improving the current design.

They are lightweight, at only about 3.25 lbs per linear foot, only 2-1/4” thick and 15-1/2” wide at the base, with a 1” lip on each top side, and can be connected together to increase the heating temperatures, or they wil sit in the channels of existing metal standing seam roofs like the UniSolar Smartroof PV installation, or mounted directly on walls. If you already have a UniSolar Standing Seam PV electric roof installed, you can reduce or nearly eliminate heating costs by adding these unique solar thermal air panels.

Each panel comes with a standard 110 CFM, 12 volt DC fan housed inside a sturdy metal enclosure that attaches to the intake 4” vent. Inside the panel, mounted on the solar heat absorber is a thermostat that will turn the fan on at about 100 degrees F, and shut it off when the heat inside drops to about 70 degrees. This prevents cold air from blowing into the room at night. In warm summer months, when the power to the fan is shut off, heat stays in the panel without damage. It also includes a plug-in 12 volt power supply, and you can also power the fan with our custom designed optional 12 volt, 15 watt PV electric panel for $195, seen in two photos below of the vertically mounted panels, that plugs directly into the fan for off-the-grid use. Using the PV panel insures sunny daytime heating even during grid power outages. This fan is designed for close mounting use with ducts less than three feet long.

For longer ducts, and more air flow with the 8’ or multiple connected panels, we suggest considering a low noise bathroom fan,

available at most home supply stores. An internally mounted on/off fan thermostat is mounted the heat absorber and turns the fan on Dual angled panel back supports—one mounted on panel, the other sits on back of panel automatically when the heat absorber reaches about 100 degrees F, and off around 70 degrees F so cold air can’t be blown in at night.

To mount the panels on flat roofs, above windows as an awning, angled on walls, or stand alone on any flat surface, these optional dual back support mounts are available on special order for $69. They can be screwed into to the far ends of the panel by removing the end covers. The mounts can then be secured to the wall, roof or rack mounts. In this photo one mount is secured to the back side end of the panel and the other is sitting on the panel for display.

Incoming and outgoing 4” vents are normally mounted on opposite ends of the upper back side of the panel, but air flow can also pass through the opposite ends of the sides of the panel for some types of special roof installations, especially when a mixture of fresh outside air is added to the air circulation.

Heat in summer, cool in winter

In summer, you can even vent the panels to the outdoors for solar cooling on the roof suface area covered by the panels. This happens because nearly all of the solar heat that otherwise saturates roofs or walls is absorbed inside the panels and carried back to the sky by moving air from the low powered fan away from the surface.

We’ve also found that when two 8’ long BISFA panels are connected together, they become an excellent heat source for SHIP, or Solar Industrial Process Heating, used in many different industries such as food drying, clothes and textile drying, paint shops, and even for saunas. In this photo, we connected two 8’ panels together on a sunny day and 75 degree cold air exited the second panel at 182 degrees F!

This was with the stock 12 volt fan, and the CFM dropped by about 40%, so a more power full fan can be used to increase the airflow, if needed. While the temperature rises, the price of generating more heat will only be slight or not at all, especially if solar PV electric panels are used to power the fans. Changing the air flow will increase or decrease the heating temperature.