An extra solar powered fan can be added as an upgrade to any Growing Dome® greenhouse kit. The kit includes a 14″ 12 volt DC (1217 CFM) hybrid fan on the 15′ – 26′ domes or a 14″ 12 volt DC (1925 CFM) solar fan on the 33′ – 42′ domes, a thermostat, shutter, Univent piston, solar panel, exterior hood, and hardware. The 26′ Growing Dome is the only kit that comes with one Hybrid Cooling Fan standard. The fan will run on solar when the sun is out, and switch to electric (if available) when it is cloudy or at night. Add one or, a few, to your Growing Dome to provide additional cooling, airflow, and ventilation. These reliable fans come with a one-year limited warranty.
| 15′ – 26′ Solar Fan Options | CFM | Air Exchange (sec) |
| 15′ (Add 1 Solar Fan) | 1217 | 26 |
| 18′ (Add 1 Solar Fan) | 1217 | 62 |
| 22′ (Add 1 Solar Fan) | 1217 | 111 |
| 26′ (Add 1 Solar Fan) | 2434 | 92 |
Solar Powered Cooling Upgrade
The Solar Powered Cooling Upgrade replaces the 115v electric AC cooling fans on the 33′ and 42′ domes with solar-powered 12v DC fans. This upgrade will reduce your carbon footprint by reducing electricity usage and will make you more self-sufficient. This is also a great option for people who do not have access to grid-tied electricity at the site of their Growing Dome. The 33′ Growing Dome kit comes with one 115V electric fan standard. When you choose the solar powered cooling upgrade, you receive two 12v solar powered fans to replace the 115V fan. The 42′ Growing Dome kit comes with two 115v fans standard. When you choose the solar powered cooling upgrade for the 42′ Growing Dome, you receive three 12v solar-powered fans to replace the 115V fans.
| 33′ and 42′ Fan Options | CFM | Air Exchange (sec) |
| 33′ Electric (1 115v Fan) | 2800 | 158 |
| 33′ Solar (2 12v DC Solar Fans) | 3850 | 115 |
| 42′ Electric (2 115v Fans) | 5600 | 130 |
| 42′ Solar (3 12v DC Solar Fans) | 5775 | 126 |
Solar Fan Upgrade Considerations
A single 12v DC fan on the 33′ and 42′ Growing Domes provides about 2/3 of the airflow of a single 115v fan (1925 CFM compared to 2800 CFM). The 115v cooling fans only use about 173 watts of energy each, and they are controlled by a thermostat. The solar-powered fans may also be regulated by a thermostat, but they only run when the sun is out. The Hybrid Fan on the 15′ – 26′ Growing Domes provides a good option if you want the energy-efficiency of solar, but also can provide extra ventilation at night and when it is cloudy.
If you live in an extremely hot environment, you may need more than the solar powered fans that we have to offer to sufficiently cool your Growing Dome. The Desert Cooling Package comes with a misting system and a 12v fan, for those in hot, dry climates. Solar swamp coolers manufactured by Southwest Solar are also a great option for hot, dry climates. If you live in a humid climate, you may need to contact a local HVAC heating and air conditioning supplier and/or electrician to assist you with purchasing an air conditioner and/or dehumidifier.