The HT-M is Heatwell's manual thermostat.  If you only want to turn on or off your floor heating when you want, then the HT-M is the thermostat for you.

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The HT-M comes in vertical and horizontal.

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The HT-M has is clearly numbered with a large turn knob.  The knob "clicks" with each degree increase or decrease, which helps those who are visually impaired.

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The HT-M can be used as a new install or as a replacement.  However, the HT-M only has an air sensor capacity (floor probes cannot be used).  If you require the use of floor probes please consider the HT5.​​