Heatmiser Slimline Thermostat v4

Product Overview

The Heatmiser Slimline Thermostat v4 is a versatile, flush-mounted programmable thermostat designed for precise control of hydronic underfloor heating and central heating systems. Combining a large, easy-to-read LCD display with flexible scheduling and multiple operating modes, the Slimline v4 is an ideal choice for both domestic and commercial multi-zone installations.

Key Features

• Programmable or non-programmable: Can be set as non-programmable, 5/2 day, 7 day, or 24-hour schedules
• Thermostat and timer modes: Selectable in software for maximum flexibility
• Up to 4 comfort levels per day: Easily schedule different temperatures throughout the day
• Self-learning Optimum Start: Learns pre-heat times for improved efficiency
• Remote air sensor facility: Supports remote air or floor sensor (optional, not included)
• Temperature sense modes: Built-in air sensor or remote sensing mode
• Temperature hold facility: Temporary override for set periods
• Holiday mode: Suspends normal programming for specified duration
• Key lock function: Prevents unauthorised changes
• Frost protection: Built-in safeguard against low temperatures
• Large backlit display: White LED backlight automatically turns off after 30 seconds
• Flush mounting: Fits standard 35mm deep back box
• C/F selectable: Display temperature in Celsius or Fahrenheit

Technical Specifications

Applications

• Hydronic underfloor heating systems
• Multi-zone central heating
• Suitable for homes, offices, and commercial buildings requiring zone control

Box Contents

• Heatmiser Slimline Thermostat v4
• Fixing screws
• Mounting plate
• Installation manual

Note: Remote air or floor sensor is optional and sold separately. Not suitable for electric underfloor heating control. No Wi-Fi or app connectivity.

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