Best Programmable Thermostat for a Flat with Storage Heaters

Storage heaters are cheap to run and awkward to control, and the wrong thermostat makes that worse. This guide narrows the field to five programmable models that suit a flat’s wiring and daily routine, from a budget single-stage unit to a color touchscreen that handles full seven-day scheduling. Renters and flat owners with a simple single-zone setup should look at the first and fourth picks, while anyone who wants app control or room-by-room schedules will find more in the middle. The overview table below puts every pick side by side so a choice can be made before reading the full reviews.

The Picks at a Glance

Product	Key Spec	Best Use	Price Tier
Honeywell Home X2P RTH20B	5-2 day schedule, 1 heat/1 cool	Simple weekday-and-weekend flats	Budget
Honeywell Home RTH7600D	7-day programmable touchscreen	Households with an irregular week	Mid-range
Sensi Smart Thermostat ST55	Wi-Fi, DIY install, Alexa	App control on a budget	Mid-range
Honeywell T4 Pro TH4210U2002	2H/1C and 1H/1C compatibility	Flats with a two-stage or zoned system	Mid-range
Honeywell Home RTH9585WF1004	Wi-Fi smart color, 7-day, touchscreen	Premium whole-flat control	Premium

1. Honeywell Home X2P Programmable Thermostat, RTH20B

Type: Single-stage programmable thermostat
Schedule: 5-2 day
System Compatibility: 1 heat / 1 cool
Color: White
Brand: Honeywell Home

The RTH20B is the straightforward option for a flat with one heating zone and no ambition to run it from a phone. Its 5-2 schedule splits the week into a weekday pattern and a weekend pattern, which matches how most people actually use a storage-heater flat: a set-back while at work, a warmer block for evenings and weekends. The single-stage, one-heat/one-cool design keeps the wiring simple, so it drops into a conventional low-voltage setup without extra relays.

This is the pick for a renter or a first-time flat owner who wants set-and-forget scheduling and nothing more. It earns its place on price and simplicity rather than features.

Trade-off: The 5-2 schedule cannot give every day its own program, so households with shift work or irregular days off will find it too rigid.

Check the current price on Amazon

2. Honeywell Home RTH7600D 7-Day Programmable Touchscreen Thermostat

Type: 7-day programmable thermostat
Display: Touchscreen
Schedule: 7-day, per-day programming
Brand: Honeywell Home
Model: RTH7600D

The RTH7600D moves up to full seven-day programming, meaning each day of the week gets its own schedule instead of a shared weekday block. For a flat where the occupants are home on different days, that flexibility matters more than app control. The touchscreen interface replaces physical buttons and makes setting a program faster than scrolling through menus with a dial.

It sits in the middle of the range and suits a household that wants precise scheduling without paying for Wi-Fi. It is not the pick for anyone who expects to change settings from a phone on the way home, since this model is programmed at the wall.

Trade-off: Programming happens entirely on the unit, so a schedule change means standing in front of the thermostat rather than adjusting it remotely.

Check the current price on Amazon

3. Sensi Smart Thermostat, Wi-Fi, ST55

Type: Wi-Fi smart thermostat
Installation: DIY
Voice Control: Alexa
Certification: Energy Star
Model: ST55
Brand: Sensi

The Sensi ST55 brings Wi-Fi and app control down to a mid-range price, which is the main reason it belongs here. A flat with storage heaters benefits from remote scheduling: the heating can be trimmed while the flat is empty and brought back up before arrival, without walking to the wall unit. DIY installation and Alexa support round out the package, and the Energy Star certification signals efficient scheduling behavior rather than raw power.

This is the pick for a buyer who wants smart features but does not want to pay premium prices for a color screen. It suits renters who can install and remove a thermostat without permanent changes.

Trade-off: The feature set leans on the app and voice assistant, so a household that prefers physical controls will find less to like on the device itself.

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4. Honeywell TH4210U2002 T4 Pro Programmable Thermostat

Type: Programmable thermostat
System Compatibility: 2H/1C and 1H/1C
Brand: Honeywell Home
Model: TH4210U2002

The T4 Pro is the flexible one in this group, rated for both 2-heat/1-cool and 1-heat/1-cool systems. That matters in a flat where the heating setup is not a plain single-stage circuit: a two-stage or zoned arrangement needs a thermostat that can drive it, and this model covers both cases. It is a programmable unit rather than a smart one, so scheduling is done on the device.

It suits a flat with a slightly more complex heating system than the budget pick can handle, without jumping to the premium tier. Buyers who only have a basic single-stage setup will get the same result for less money from the RTH20B.

Trade-off: The extra compatibility raises the price over the budget pick, and it buys nothing for a flat with a simple one-zone system.

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5. Honeywell Home RTH9585WF1004 Wi-Fi Smart Color Thermostat

Type: Wi-Fi smart thermostat
Schedule: 7-day programmable
Display: Color touchscreen
Voice Control: Alexa ready
Certification: Energy Star
Color: Gray
Model: RTH9585WF1004

The RTH9585WF1004 is the premium pick: a Wi-Fi thermostat with a full seven-day program, a color touchscreen and Alexa readiness. For a flat, the combination of per-day scheduling and remote control covers both the routine and the exceptions, and the color screen makes the current program easier to read at a glance than a monochrome display.

It suits a buyer who wants the most control and the most visible interface in one unit, and who is willing to pay for both. It is overkill for a small flat with a single heater and a fixed weekly routine.

Trade-off: The premium price and color screen add cost and complexity that a simple flat with one heating zone will never use.

Check the current price on Amazon

Before You Buy

• Compatibility: Check the flat’s heating circuit before ordering — a single-stage system needs only a 1H/1C unit, while a two-stage or zoned setup needs the T4 Pro’s wider rating.
• Schedule type: A 5-2 schedule suits a regular week; a 7-day program is worth the extra for shift workers or households with varied days.
• Wiring: Confirm the existing thermostat’s wire count and low-voltage setup, since a smart model may need a common wire that older storage-heater flats lack.
• Control method: Decide whether scheduling happens at the wall or in an app, because the budget and mid-range picks are device-only.
• Rental terms: A renter should confirm the landlord permits a thermostat swap and keep the original unit for reinstatement.
• Heating type: Programmable thermostats control the heating circuit, not the storage heater’s off-peak charging, so confirm how the flat’s heaters are actually switched.

Frequently Asked Questions

1. Can a programmable thermostat control storage heaters directly?
   It controls the heating circuit it is wired to, not the off-peak charging of the storage heater itself. The flat’s existing switching arrangement determines what the thermostat can actually manage.

2. Is a smart thermostat worth it in a flat?
   It is worth it when remote scheduling saves energy during empty hours or when the routine is irregular. A flat with a fixed weekly pattern gets most of the benefit from a cheaper programmable model.

3. Which pick suits a renter?
   The X2P RTH20B is the safest rental choice because it is inexpensive and simple to remove. The Sensi ST55 is the better rental option for anyone who wants app control.

4. Do these thermostats need a common wire?
   Smart models often do, while the basic programmable units typically do not. The existing wiring should be checked before ordering any Wi-Fi model.

5. What is the difference between 5-2 and 7-day programming?
   A 5-2 schedule uses one pattern for weekdays and another for weekends, while a 7-day schedule gives each day its own program. The latter suits irregular routines.

6. Can one thermostat handle a whole flat?
   It can handle the single heating zone it is wired to. A flat with multiple zones needs either multiple thermostats or a zoned system the thermostat is rated to drive.

Bottom Line

For most flats with storage heaters and a single heating zone, the Honeywell Home X2P RTH20B is the sensible buy: a 5-2 schedule, simple wiring and the lowest price of the five. Buyers who want app control should step up to the Sensi ST55, and anyone with a two-stage or zoned system should choose the T4 Pro instead.