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Environmental Controllers All Environmental Controllers are special order and will take an extra 4 days deliver time. Green Air Sentinel Environmental and Temperature Controllers CO2 Regulators and Generators New! LuxPro PSP300 Programmable Digital Thermostat Programmable outlet thermostat allows control any 120 volt device up to 15 amps. Use with a fan or air conditioner for cooling purposes. Also may be used with a space heater for heating purposes. Separate programs for heating and cooling. Setting Range 45°F to 90°F (7°C to 32°C) with F/C selectable. Temporary temperature override and a manual hold.    • Adjustable temperature differential/cycle rate.    • Mode slide switch and a positive on/off switch.    • 120VAC outlet powered.    • 12 hour clock only.    • 2 G13A size 1.5V alkaline batteries included (for clock only).    • On-screen low battery indicator.    • Battery free memory storage.    • 5 minute short cycle protection.    • Time and temperature alternate in display. $63.95 - Sale $54.40 Qty: Gardening Indoors With CO2 Author: George Van Patten Plants can use up to five times more CO2 than naturally occurs in the air. CO2, essential to photosynthesis, is often the most overlooked element limiting plant growth. This book demonstrates how fertilizing the air with CO2 can shorten growing time and double your harvest. Includes technical information on how to set up a CO2 emitter system or generator system and how to grow cuttings and seedlings with CO2. Packed with the most up-to-date facts and figures on CO2, Gardening Indoors With CO2 shows you how to put CO2 to work in your garden room or greenhouse for super results! Soft cover 96 pages. Retail Price: $14.95 Sale Price $12.75 Qty: