Choosing the best smart thermostats for older home means checking the wiring before you choose a screen or app. The key split is whether you want a no-C-wire wired replacement or a battery-powered unit, especially if you are updating an older home, office, or hotel room.
Pros
- No C wire required
- Mobile app and voice control
- Programmable heating schedules
- Vibrant LCD color screen
Cons
- Remote control depends on WiFi
- No stated safety certification
Pros
- No C-wire installation
- 95-240VAC, 50-60Hz operation
- App and voice control
- TFT color touchscreen display
Cons
- 5-35°C temperature calibration range
- IP20 protection rating
Pros
- Battery-powered installation, no separate AC wiring
- Smart Life/Tuya app remote control
- Voice assistant compatibility
- 5+2, 6+1, or 7-day scheduling
Cons
- Battery-dependent rather than AC-powered
- Requires Zigbee-compatible smart-home setup
Start with the Existing Heating Setup
Older properties can have limited wiring behind the wall, so a thermostat that does not require a C wire may reduce the work involved. The Hamwesh Smart Thermostat and Asixxsix Smart Thermostat both specify no-C-wire installation, while the ChicBosom Smart Thermostat for Tuya Zigbee uses batteries and does not need a separate AC power supply.
That distinction matters more than a decorative display. Asixxsix states compatibility with water heating, wall-mounted boilers, electric heating, AC units, and underfloor systems, while Hamwesh specifically highlights floor heating. Check your heating system and the existing box before choosing a replacement.
Pro Tip: Confirm the current wiring and heating type before removing the old thermostat. A no-C-wire label does not make every heating system compatible.
Power Choices for Older Walls
A battery-powered thermostat can be useful where pulling a new power supply through finished plaster would be inconvenient. ChicBosom is designed for battery-powered installation, with app control through Smart Life or Tuya and voice control through a compatible voice assistant.
Wired no-C-wire models take a different approach. Hamwesh combines WiFi, mobile app control, programmable scheduling, and a color LCD screen, while Asixxsix adds a color touchscreen, app and voice control, automatic calibration, and a stated accuracy of plus or minus one degree Celsius.
Before You Mount It: Do not assume a thermostat can control every boiler, floor-heating circuit, or AC system. Match the listed application to the equipment already in the room.
Controls That Suit Daily Routines
Older homes often have rooms that heat unevenly, making scheduling more useful than constant manual adjustment. ChicBosom supports 5+2, 6+1, or 7-day programming, so you can set different patterns for weekdays, weekends, or every day.
Hamwesh focuses on programmable heating with a clear LCD color screen and remote mobile management. Asixxsix offers manual or programming modes through its touchscreen and supports temperature settings from 5 to 35 degrees Celsius, giving you a broader set of controls for a room with changing occupancy.
For related smart-home planning, see these Zigbee smoke detectors for Home Assistant and consider whether your thermostat’s communication method fits the rest of your devices.
Expert Examined
From Dana Whitfield
I keep the wiring decision ahead of the feature list because an attractive screen cannot compensate for an unsuitable connection. The mistake I see is choosing the interface first, then discovering that the wall box and heating equipment require a different power approach.
Read more about Dana WhitfieldMatch the Thermostat to the Room
The right model depends on both the heating equipment and how much access you want from outside the home. A floor-heated room may favor Hamwesh or Asixxsix because both describe floor-heating control, while a room where new power wiring is difficult may favor ChicBosom’s battery format.
Remote management is available across the three options, but the platforms differ. Hamwesh and Asixxsix use app-based control with WiFi or wireless connectivity described in their specifications, while ChicBosom uses the Smart Life or Tuya app and Zigbee.
For broader household planning, the Smart Energy and Climate Control category can help you keep thermostat choices aligned with other home devices. The HomeKit doorbell camera coverage is also useful if platform compatibility matters across your home.
| Power approach | Main control | Suitable focus |
|---|---|---|
| No C wire | WiFi and app | Floor heating or HVAC |
| No AC supply | Tuya or Zigbee | Flexible wall placement |
| No C wire | Touchscreen and voice | Multi-system heating |
Which Thermostat Fits Your Older Home
I would point you to the Hamwesh Smart Thermostat if you want a color LCD, WiFi access, programmable heating, and a no-C-wire design for a home office or floor-heated room. Its stated strengths are straightforward remote management and a display intended for clear daily adjustments.
I would choose the Asixxsix Smart Thermostat for a buyer who needs broader listed heating support, a touchscreen, voice control, and scheduling. Its specifications cover water heating, wall-mounted boilers, electric heating, AC units, and underfloor systems, though you should still confirm the equipment match first.
For a room where adding a separate AC power supply is the main obstacle, I would put the ChicBosom Smart Thermostat for Tuya Zigbee first. Battery power, weekly programming, Tuya or Smart Life access, and voice-assistant support make it the most wiring-conscious option of the three.
The Bottom Line
The single mistake buyers make with an older home is treating no-C-wire support as proof that any thermostat will work with their heating equipment. The three models differ in power method, heating applications, display style, and smart-home connection.
If you only do one thing first, identify the heating system and inspect the wiring behind the current thermostat. Then select the model whose stated power and application match that setup before prioritizing voice control, schedules, or screen design.
FAQs
A no-C-wire model can simplify replacement where the existing wall wiring is limited. A battery-powered model can avoid the need for a separate AC power supply, but the heating system still needs to match the thermostat’s listed applications. Hamwesh highlights programmable control for floor heating, and Asixxsix lists underfloor heating among its supported applications. Confirm whether your system uses water or electric heating before selecting a model. Not all three use the same power arrangement. Hamwesh and Asixxsix specify no-C-wire installation, while ChicBosom is battery-powered and does not require a separate AC power supply. Zigbee is the wireless connection identified for the ChicBosom model, which also uses the Smart Life or Tuya app. Compatibility with your existing smart-home setup should be checked before purchase. Keep the display and touch controls clean, monitor the battery-powered model’s batteries, and review the programmed schedule when occupancy changes. If the system behaves unexpectedly, recheck the wiring and heating application rather than changing settings repeatedly.Which thermostat type suits an older home?
Can these thermostats control floor heating?
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Sources
- US Consumer Product Safety Commission www.cpsc.gov
- UL Solutions www.ul.com