Heatmiser DS1-L Central Heating Thermostat

Technical Description

The Heatmiser DS1-L is a 230V electronic dial thermostat designed for use with conventional and combi-boiler systems. It features a modern, flush-mounting design and a clear LCD display that shows the actual room temperature and a heat-on indicator. Temperature adjustment is simple using the intuitive rotary dial, which temporarily displays the set temperature when turned.

Key Features:

• Temperature Range: 5–35°C
• Power Supply: 230V AC
• Maximum Output: Volt-free, 3A max
• Mounting Type: Flush mounting
• Dimensions: 92mm x 92mm x 14mm (H x W x D)
• Switching Differential: Adjustable for fine-tuning heating response
• Air Sensor: Built-in sensor for accurate room temperature control
• Remote Sensor Capability: Compatible with optional Heatmiser thimble sensor (sold separately)
• Display: LCD with actual/set temperature and heat-on indication
• Lock Facility: Prevents unauthorised temperature changes
• IP Rating: IP20

The DS1-L requires a minimum of three wires for installation: Live, Neutral and Switch. It is suitable for both surface and flush mounting. Ideal for replacement of older thermostats, the DS1-L offers improved control, energy efficiency, and a sleek design.

Ideal for:

• Central heating systems
• Water underfloor heating systems
• Users wanting reliable, manual temperature control with digital feedback

Box Contents:

• Heatmiser DS1-L Thermostat
• Fixing screws and fittings
• Installation manual

Note: Remote air sensor is not included and must be purchased separately.

Please note: Delivery times may vary depending on location, with specific details outlined below.

Standard Delivery

UK Mainland 

• Delivery Time: 2–4 working days
• Free Delivery on all orders

Express Delivery

UK Mainland

• Delivery Time: 1–3 working days
• Delivery fee of £15

Channel Islands

• Postcodes Covered: GY*, IM*, JE* 
• Minimum Order: £50
• Delivery Fee: £70

Northern Ireland, Offshore Territories & Scottish Islands 

• Postcodes Covered: BT*, HS*, KW, ZE
• Minimum Order: £50
• Delivery Fee: £35

Same Day Delivery 

• Eligible Postcodes:
  E*, EC*, N*, NW*, SE*, SW*, W*, WC*, HA*, UB*, EN*, IG*, RM*, KT*, SM*, CR*, BR*, DA*, TW*
• Minimum Order: £50
• Same Day Delivery Fee: £60
• Special Requests or Locations:
  For areas outside these postcodes or urgent quotes, please email orders@qualityheating.co.uk and we’ll do our best to accommodate.

Collections

Want to collect your order instead?You’re welcome to do so — just email us at orders@qualityheating.co.uk or message us via WhatsApp with your preferred collection time, and we’ll confirm the details.

Collection address: 284 Water Rd, Unit 9, London, HA0 1HX