Solar is smart!How do Solar Vent Openers work?“Solar” vent controls convert heat energy from the sun into mechanicalenergy to open the vents. The hotter it gets, the wider the ventsare opened.The power comes from a cylinder with a piston inside. It contains amineral wax that expands when heated. This expansion pushes thepiston, driving a leverage arm that lifts the vent. As the temperaturelowers, the wax cools and shrinks. A strong spring closes the vent andresets the piston. Opening and closing are gradual changes, allowingjust the right amount of air flow for cooling.Which vent opener do I need?UniventOptiventMODELMK7 Triple SpringMK7 OrchidMK7 HydraulicheckMK7 SuperMega VentGiga VentRoof Vent Side Vent Openers can be installed in series to open a long or heavy vent. All openers have a 2-year mfg. warranty. NEW! Giga Vent ControlHeaviest lifting capacity.LiftingpowerWinds+50 mphGraduallyopens toNEW! Mega Vent ControlWith a 26-lb. lifting capacity, twice thatof standard solar openers, the MegaVent is the best choice for heavier roofvents, side windows and skylights.A built-in hydraulic damper preventsthe vent from being opened by highwinds. An extra-strong return springprovides positive closing action. The cylinder can be adjusted for openingtemperatures between 63° F - 77° F. Fully open at 15". Aluminum finish.C3530 NEW Mega Vent Control, aluminum $99.00C3532 Replacement Cylinder for Mega Vent $32.00The ultimate solar vent control! Opens and closes ventsweighing up to 65 lbs. A hydraulic safetydamper prevents gusty winds fromdamaging the vent. Adjustableoperation starting at 62° Fand wide open at 86° F.Maximum opening is 18". Overall length 24". Multiple mounting positionsallow installation on most vents.C3526 NEW Giga Vent Control $149.00C3528 Replacement Cylinder for Giga Vent $68.003014 lbs14 lbs14 lbs14 lbs14 lbs35 lbs26 lbs33, 47,or 6618"18"12"12"12"15"15"18", 16",or 12"Harness The SunUnivent ControlMultiple usesThis unique vent control willopen and close roof ventsand side vents, a cold framelid, top-hinged wall vents, oreven the greenhouse door!The Univent is the onlysolar-powered control witha quick-release mountingbracket and two closingsprings for extra strength.Just grasp the “clutch” armand squeeze for easy detachment. This allows a cold frame lidto be fully opened for access to the plants. The cylinder can beadjusted for opening temperatures between 60° F and 77° F.Full opening of 18" is reached at 86° F. Lifting capacity is 15lbs. Corrosion-resistant aluminum and stainless steel.C3515 Univent Control$49.95, 2+ $44.95 eaC3513 Replacement Cylinder $19.95Liberty LouverOpenerThis solar-powered controlwill open and close a louverwindow as temperatureschange, enhancing air flowthrough the greenhouse asneeded. Operating range iseasily adjustable.OptiventRoof Vent OpenerThis streamlined control fitsclose to the roof, out of the way.Starting temperature adjustsbetween 60° F and 77° F, and itsmaximum opening is 18" at 86° F.Two springs help close the ventsecurely.C3527 Optivent Roof Vent Opener$49.95, 2+ $44.95 eaC3513 Replacement Cylinder$19.95C3533 Liberty Louver Opener$44.95C3513 Replacement Cylinder$19.95Louver Window – Aluminum frame, tempered safetyglass vanes. Replaces a 24" W x18" H glass pane.K7432 MILL 5-Blade Louver Window, Mill finish $49.95K7432 GRN 5-Blade Louver Window, Green finish $59.95Shop our website for more Solar Products
For Automatic Ventilation!Bayliss Triple Spring ControlStandard temp range 55° F to 75° FWith 2 extra closing springs, this model has more strength tohold a vent closed. Extra closing power makes it the best model forcontrolling top-hinged wall vents.C3503 Bayliss MK7 Triple Spring $69.95, 2+ $64.00 eaC3510-55 Bayliss MK7 Replacement Power Tube $29.95Bayliss Orchid Vent Control For tropical greenhousesOrchid temp range 65° F to 85° FThis solar-powered control operates at a higher temperature thanother similar controls, allowing the greenhouse to become about10° warmer (65° F) before the control begins to open the vent.This triple-spring design can be used on either wall vents or roofvents. Lifting capacity 15 lbs. Maximum opening 12".C3505 Bayliss Orchid Vent Control $79.95, 2+ $75.00 eaC3510-65 Bayliss Orchid Replacement Power Tube $35.95Solar Vent OpenersC3505C3503Bayliss Solar-Powered Vent ControlsMaterials: Bayliss Vent Controls are made from the best corrosionresistant materials: brass, stainless steel and aluminum. They are designedto give many years of service and are covered by a 2-year mfg. warranty.Capacity: The Bayliss can exert a force of 14 lbs. at the point where it isattached to the vent. A threaded hex bolt can adjust to start opening thevent between 55° F and 75° F. Maximum opening of 12" is reached atapproximately 20° F above the starting temperature.12-1/2"MaximumOpeners can be installed in a series on a long vent to replace worn out electric ventmotors. The adjuster bolt can equalize the loading so the lifters work in unison.12" LengthPower TubeClosing SpringHexagon AdjusterAutomatic ColdFrame VentUSES NO ELECTRICITY! Opensand closes by a temperature sensitivespring mechanism. Range 40° F to70° F. Install one front vent for intakeand one high in the back for warm airexit. Size: 8" x 15-1/2".C3336 Thermatic-Vent ® $19.95MK7 SuperHeavy lifting capacityLifts 35 lbs. Can set to start openingbetween 65° F and 75° F. Maximumopening 15".C3540 Bayliss MK7 Super$198.00, 2+ $186.00 eaC3541Bayliss Super ReplacementPower Tube $89.00charleysgreenhouse.com 800-322-4707Hydraulicheck - Heavy-duty controlStandard temp range 55° F to 75° FThis control is the best choice for large roof ventsand side-hinged wall vents. A built-in hydraulicdamper prevents the vent from being opened byhigh winds. The damper only allows gradualopening as called for by the solar-powered piston.Two return springs provide positive closing action.C3509 Bayliss Hydraulicheck$116.00, 2+ $99.00 eaC3510-55 Bayliss Replacement Cylinder $29.9531
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