Replacing an old mechanical or basic digital thermostat on a heat pump or single-stage furnace is one of the most common service calls. The T721 is a T700 platform non-programmable digital thermostat from Pro1 IAQ that handles a 2-heat/1-cool heat pump or a 1-heat/1-cool conventional system, with a 4 sq. in. display. HVAC techs and property managers like it for rentals where a simple hold-the-setpoint thermostat is all tenants need.
Why HVAC techs pick it
- One model covers heat pumps (2H/1C) and conventional gas, oil or electric systems (1H/1C), including millivolt systems, per the manual.
- Runs on 2 AA batteries (included) or 18 to 30 VAC hardwire, with batteries as backup.
- Separate heating and cooling swing adjustable from 0.2° to 2.0°.
- Built-in 5 minute compressor delay protects the equipment after power interruptions.
- Non-programmable, so there is no schedule for occupants to misset.
Specifications
| Spec |
Detail |
| Brand |
Pro1 IAQ (listed under ALLTEMP) |
| Model |
T721, T700 platform |
| Stages |
2H/1C heat pump or 1H/1C conventional |
| Programming |
Non-programmable |
| Display |
4 sq. in. |
| Control range |
44°F to 90°F (7°C to 32°C) |
| Swing |
Heat and cool, adjustable 0.2° to 2.0° |
| Power |
18-30 VAC Class 2 hardwire or 2 AA alkaline |
| Operating ambient |
0°C to 41°C, 90% RH non-condensing max |
| Dimensions |
4.7 in W x 4.4 in H x 0.8 in D |
| Not compatible with |
Two-transformer systems; not a line-voltage thermostat |
Pro tip from the counter
On battery-only installs, warn the occupant not to ignore the low-battery icon: per Pro1, after 21 more days the setpoints lock to 55°F heat / 85°F cool, and after day 63 the thermostat shuts the system off until batteries are replaced. Running the C (common) wire whenever one is available avoids a no-heat call in January.
Best for: heat pump thermostat replacements, single-stage furnace and A/C systems, rental and multi-unit properties, HVAC service van stock
We ship across Canada from Vaughan, ON. HVAC contractors can request trade pricing with a quote or call (905) 553-7171.