Diversitech t805 Single Stage Thermostat 1H/1C

Product Description

The DIVERSITECH t805 is a single-stage, 1-heat/1-cool programmable thermostat designed for residential and light-commercial HVAC applications. It operates on 18 to 30 VAC (NEC Class II, 50/60 Hz) with hardwire common wire or 2 AA alkaline batteries, giving installers flexible power options. The t805 features auto changeover between heating and cooling modes and a large 8 square-inch backlit display with a glow-in-the-dark light button. Load rating is 1 amp per terminal with a 1.5 amp combined maximum. Licensed HVAC technicians install this thermostat as a direct upgrade or replacement in forced-air gas or electric heating and cooling systems.

The t805 is suited for residential forced-air systems with single-stage heating and single-stage cooling. It supports 7-day or 5/1/1 programmable scheduling with intuitive wake, leave, return, and sleep programming icons. The thermostat is configurable for electric or gas heat and mounts on a standard wall surface or junction box using its universal sub-base. It is appropriate for any HVAC contractor or service technician performing a thermostat upgrade or new installation in a single-stage system.

Key Features

• Auto changeover between heating and cooling modes
• 8 square-inch display with blue backlight and glow-in-the-dark light button
• 7-day or 5/1/1 programmable scheduling with menu-driven programming
• Operates on 18 to 30 VAC hardwire or 2 AA alkaline batteries
• Separate adjustable heating and cooling swing from 0.2 degrees F to 2.0 degrees F
• 5-minute compressor delay protection, keypad lockout, and filter change indicator (all selectable)
• Universal sub-base mounts on wall or standard junction box

Compatibility

Designed as an OEM-style replacement or upgrade for single-stage 1H/1C residential HVAC systems. Compatible with electric or gas heating configurations. Intended as a direct upgrade from the PRO1 T705 thermostat.

Installation Notes

Installation should be performed by a licensed HVAC technician following applicable NEC Class II low-voltage wiring requirements. Power down the air handler or furnace and disconnect the thermostat circuit before removing the existing thermostat. Color-coded terminal blocks are included to simplify wire identification and connection. Verify system type (gas or electric) and configure the thermostat accordingly during setup before restoring power.

Technical Specifications

• System Type: 1-Heat / 1-Cool Single Stage
• Power Source: 18 to 30 VAC, NEC Class II, 50/60 Hz (hardwire) or 2 AA Alkaline batteries
• Load Rating: 1 amp per terminal, 1.5 amp maximum all terminals combined
• Display Temperature Range: 41 degrees F to 95 degrees F
• Control Temperature Range: 44 degrees F to 90 degrees F
• Display Accuracy: plus or minus 1 degree F
• Heating Swing (Adjustable): 0.2 degrees F to 2.0 degrees F
• Cooling Swing (Adjustable): 0.2 degrees F to 2.0 degrees F
• Operating Ambient Temperature: 32 degrees F to 105 degrees F
• Operating Humidity: 90% non-condensing maximum
• Dimensions: 4.7 inches W x 4.4 inches H x 1.1 inches D
• Display Size: 8 square inches
• Programmable Schedule: 7-Day or 5/1/1
• Warranty: 5 years

Standard Information

• Brand: DIVERSITECH
• Manufacturer Part Number: t805