Yes, a millivolt thermostat can give precise, reliable control for gas fireplaces without needing a separate power supply. This guide highlights top options suited to different needs, from simple heat-only units to remote-control systems. Ideal buyers include homeowners seeking straightforward installation, do-it-yourselfers wanting quick setup, and those who prioritize easy visibility and backlighting for dim rooms.
Below is a quick summary of the five products selected for this topic, focusing on suitability, installation ease, and key limits to watch for in millivolt-based fireplace setups. Use this table to compare basic features at a glance.
| Product | Best For | |
|---|---|---|
| HONEYWELL HOME CT33A1009 Economy Non-Programmable Thermostat | Simple heat-only control for basic fireplaces | Limited features; no programmability |
| PSD010B Non-Programmable 2-Wire Heat-Only Thermostat | Easy DIY install for homes or offices | Non-programmable; two-wire setup |
| Honeywell TH1100DV1000 Pro-Digital 2-Wire Heat Only | Clear display and adjustable range | Need stable wall placement for visibility |
| Durablow TR1004 Gas Fire Fireplace On/Off Remote Kit | Remote control with timer for millivolt valves | Not a power supply; uses thermostat as sensor |
| Durablow TR1003 On/Off Remote Kit with LCD | Remote control with LCD and timer | Similar caveat about power flow, be mindful of installation |
HONEYWELL HOME CT33A1009 Economy Non-Programmable Thermostat
The CT33A1009 is a basic, millivolt heat-only thermostat designed for simple fireplace control. It is best for buyers who want a straightforward, no-frills unit that reliably turns the gas valve on and off without adding power requirements. Its economy framing appeals to budget-conscious installations or rental properties where simplicity matters. The device is described as designed to work effectively with millivolt systems, making it a good match for most older gas fireplaces that require minimal wiring.
Best for: homeowners seeking a low-cost, reliable heat-only thermostat for a standard millivolt fireplace. Why selected: it delivers essential on/off control with minimal setup and compatible wiring. Limitation: lacks programmable features or advanced scheduling, which may be a downside for users wanting energy-saving routines.
PSD010B Non-Programmable 2-Wire Heat-Only Thermostat
The PSD010B is a two-wire, heat-only unit designed for quick, straightforward installation. It’s well-suited for simple home setups, small fireplaces, stoves, or radiant systems where minimal electronics are preferred. The product emphasizes easy installation and compatibility with heat-only systems, which can make it a strong choice for DIY projects or replacing an aging thermostat without extra wiring or a fan switch.
Best for: DIYers or small spaces needing a quick install and basic control. Why selected: simple wiring, no fan wiring required, and compatibility with common millivolt heat systems. Limitation: no programmable features, so scheduling or energy management is limited.
Honeywell TH1100DV1000 Pro-Digital 2-Wire Heat Only
The TH1100DV1000 offers a digital, two-wire heat-only experience with an adjustable temperature scale from 40 to 90F. It includes a backlit display for easy reading in dark rooms and continuously displays ambient temperature. This model is best for buyers who want clearer readouts and a broader comfort range without programmable scheduling. It is a solid choice for mid-size living areas or bedrooms where user-friendly visibility helps morning and evening adjustments.
Best for: users who want a digital readout and broader, readable temperature range. Why selected: backlit display, easy visibility, and stable 2-wire operation. Limitation: non-programmable, so you can’t automate daily temperature shifts.
Durablow TR1004 Gas Fire Fireplace Remote Kit
This remote control kit combines a thermostat with a wireless transmitter and backlit receiver, designed for millivolt valve control in gas fireplaces. It includes a timer and a user-friendly LCD, with a range of up to 20 feet. It is best for buyers who want remote operation, adjustable timing, and room-temperature-based on/off control. Note that this device is not a power supply; it passes voltage through from the fireplace thermopile, so installation must respect safety guidelines and in-series wiring requirements.
Best for: homeowners who want wireless control and a timer for a gas fireplace. Why selected: adds remote functionality and adjustable timing. Limitation: not a stand-alone power source; ensure proper integration with existing wiring and safety considerations.
Durablow TR1003 On/Off Remote Kit with LCD
The TR1003 kit provides an LCD remote control and thermostat functionality for millivolt valves, complementing a gas fireplace setup with timer options and a user-friendly display. This option is best for buyers seeking better readability and remote control in a compact package. It also shares the same caveat as other remote Durablow kits: it is not a power supply, so installation must consider power flow from the existing thermopile and safe wiring practices.
Best for: buyers needing an easier-to-read thermostat with remote control features. Why selected: LCD display, temperature range similar to other Durablow options, and ease of use. Limitation: still relies on existing millivolt wiring; not a standalone power source.
Buying Guide: Millivolt Thermostats For Gas Fireplaces
What is a millivolt thermostat?
A device that controls gas valves in millivolt systems, typically powered by the fireplace thermopile rather than an external power source. This makes wiring simpler but requires compatibility with millivolt valves.
Do I need programmable features?
Programmable models offer scheduling, but many homes operate effectively with non-programmable units for simple on/off control. Consider whether you want energy-saving schedules or just reliable temperature management.
What installation considerations matter?
Ensure compatibility with two-wire or millivolt setups, verify wiring paths, and confirm that the thermostat’s temperature range matches the room’s needs. Remote kits require proper placement and a safe power flow scenario.
When is a remote kit advantageous?
Remote control is beneficial for fireplaces installed in hard-to-reach locations or rooms where convenient access to settings improves daily use. Timers add convenience for bedtime or away-from-home safety checks.
What safety checks should I perform?
Follow manufacturer guidance for wiring, ensure the thermopile and valve connections are correct, and avoid off-circuit wiring that could affect flame safety. If unsure, consult a professional installer.
Frequently Asked Questions
- What is a millivolt thermostat best used for?
- Can I install these myself without a professional?
- Do these thermostats work with all gas fireplaces?
- Are remote thermostat kits safe for millivolt valves?
- What should I choose for a simple upgrade?
- What maintenance is required for millivolt systems?