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Announcing the Dieselheat V4 Hydronic Thermostat

Published 30/06/2026 ·by NIck Tanner

We are always looking for ways to improve our products, and we’re pleased to introduce the new V4 Dieselheat Hydronic Thermostat.

The new V4 thermostat includes several improvements over the previous V3 model:

  • Fuel Level Display – Displays the fuel level when connected to the optional Dieselheat fuel level sensor.
  • Hot Water Readiness Indicator – A simple progress graph lets users see when the system has reached temperature and is ready to deliver hot water.
  • Improved Mounting Design – The redesigned housing requires less clearance behind the thermostat, making installation easier.

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