Auto Opener Red Velcro Strap & Piston

Riga auto opener safety video — why you must disconnect the Univent piston before using the red velcro strap or sash lock, or the cylinder can burst.

Auto Opener Replacing a Broken Cast-T Piece

Riga auto opener repair video — how to replace a broken cast-T piece on the Univent window opener.

RIGA/RIGA XL Automatic Opener Correct and Incorrect Position

Riga and Riga XL auto opener video — correct vs incorrect Univent mounting so the cylinder sits parallel to the window and is not overloaded.

Exhaust Fan - 12", 16", and 20"

Riga XL 20" Exhaust Fan Installation Instructions

Exhaust Fan Spec Sheet

L.B. White Volt 1.5 Electric Heater – 1500W, 120V, 12.5 Amp

Official bilingual (English/Spanish) guide covering specifications, safety warnings, installation and setup, operation, wiring diagram, service parts list, and limited warranty for the 120 V / 12.5 A electric forced-air heater.

L.B. White Volt 3 Electric Heater – 3000W, 240V, 12.5 Amp

Official bilingual (English/Spanish) guide covering specifications, safety warnings, installation and setup, operation, wiring diagram, service parts list, and limited warranty for the 240 V / 12.5 A electric forced-air heater.

L.B. White Volt 6 Electric Heater – 6000W, 240V, 25 Amp

Official bilingual (English/Spanish) guide covering specifications, safety warnings, installation and setup, operation, wiring diagram, service parts list, and limited warranty for the 240 V / 25 A electric forced-air heater.

L.B. White Volt 9 Electric Heater – 9000W, 240V, 37.5 Amp

Official bilingual (English/Spanish) guide covering specifications, safety warnings, installation and setup, operation, wiring diagram, service parts list, and limited warranty for the 240 V / 37.5 A (or 25 A at 6 kW) electric forced-air heater.

PECO Manual Dial Thermostat Installation

PECO TF115P-002 installation instructions — plug-in greenhouse thermostat setup, cooling vs heating wiring, mounting, and operation for exhaust fans and intake vents.

PECO TF115P Manual Dial Thermostat

PECO T115 thermostat video — how the weatherproof greenhouse thermostat works and how to wire it for cooling (exhaust fan/intake vent) or heating.

PECO Thermostat Datasheet/Wiring

PECO TF115P-002 datasheet — specs, ratings, dimensions, temperature range, and cooling/heating wiring diagrams for the plug-in greenhouse thermostat.

Polycarbonate Comparison w-R-values H LR

Riga Auto Openers - Adjusting and Disconnecting

Riga auto window opener video — how to adjust the Univent cylinder and disconnect it for winter or storms so the piston does not burst.

Riga Base Instructions

Step-by-step guide for assembling the base foundation of your Riga greenhouse. Start here before any other assembly steps.

Heater Calculator

Greenhouse heater BTU calculator — estimate heater size by surface area, lowest outside temperature, target inside temperature, and polycarbonate heat-loss value.

Riga S Assembly Manual (2024 & Earlier)

This is the official Assembly Instructions Manual (Version 3.2023) for the Exaco Hoklartherm Riga S & Riga Greenhouse Basic Kits. It provides step-by-step guidance for site planning, foundation setup, gable and frame assembly, polycarbonate glazing installation, roof windows with automatic openers, and divided revolving door setup.

Riga S Assembly Manual (2025)

This is the official assembly guide for the 2025 Hoklartherm Riga Greenhouse models (including Riga 2s, 3, 3s, 4, 4s, and 5) distributed by Exaco. It provides step-by-step instructions, diagrams, and parts lists for site preparation, foundation framing, roof vents, doors, gables, sidewalls, polycarbonate panels, and accessories.

Riga Standard Series Assembly Video

Assembly instructions for the RIGA 3, 4, &5 Greenhouse models.

Riga XL Installation Instructions

Full installation guide for the Riga XL greenhouse models. Updated 2025 edition covering all structural and glazing components.

Solar Exhaust Fan

Solar-powered 16" exhaust fan for Riga and other greenhouses. Runs without electricity using a 50W foldable solar panel, included thermostat, and battery box (batteries sold separately). Brushless motor with lifetime warranty. Ideal for Riga 5 and compatible with all Riga models plus most polycarbonate or glass greenhouses. Easy DIY installation — cuts a 16.25" opening. Perfect off-grid ventilation to reduce heat and humidity.

Intake Shutter Vent Installation Instructions

Exaco Riga XL intake shutter vent installation video. Shows how to cut the polycarbonate opening, mount the motorized intake vent, attach the motor, chain, and spring, then seal with silicone. Same method for 16", 20", and 24" intake vents on Riga 4, Riga 5, and Riga XL greenhouses.

Window/Vent Opener Greenhouse - Univent®

Univent automatic greenhouse window opener video — how the wax-cylinder vent opener works and installs on Riga and other greenhouse roof vents.