By Design Tech Solutions — Building Resilient Low-Carbon Heat Systems

Introduction: One Source Isn’t Always Enough

In real-world heat networks, demand varies, funding shifts, and conditions change — that’s why many of the most efficient systems are hybrid.

By combining different sources like heat pumps, solar, CHP, and gas boilers, we can balance carbon, cost, and resilience. At DTS, we design hybrid energy centres with smart logic and scalable layouts to meet today’s needs and tomorrow’s upgrades.

Why Hybrid Systems Are Valuable

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Load Matching
Each source contributes where it performs best — e.g. heat pumps for base load, gas for peak.

Carbon Savings Without Compromise
Use renewables as primary, and fall back to gas or CHP when needed — no need to oversize.

Better Use of Existing Infrastructure
Hybrid setups can phase in new tech while reusing parts of older systems.

Improved Funding Eligibility
PSDS and HNIP often support systems that show a mix of carbon saving and reliability.

Backup Heat: Still Essential in Many Schemes

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Gas Boilers
Often used as N+1 backup, covering full or partial load in case of fault, freeze, or outage.

Thermal Stores
Help absorb fluctuations in heat pump output or solar availability, and allow better sequencing.

Battery or Generator Power Backup
Supports electrical resilience for critical loads or sites without grid redundancy.

DTS Design Priorities in Hybrid Systems

Smart Sequencing Logic
We define how sources are staged, prioritised, and overridden — based on carbon, temperature, or tariffs.

Thermal Buffer & Flow Management
We integrate storage tanks, diverters, and valves to smooth source switching.

Control System Compatibility
We ensure that BMS or standalone controls can manage logic cleanly across all inputs.

Physical Layout Planning
We allow space for future upgrades, source swaps, or phased commissioning.

Backup Testing & Override Paths
We build in safety layers for manual override, automatic fault detection, and control panel access.

Typical Use Cases

  • New-builds with staged completion

  • Networks serving both heating and DHW

  • Public sector projects needing backup compliance

  • Retrofit systems bridging legacy and low-carbon plant

FAQ

Do I still need gas if I have heat pumps? +
Not always — but gas backup is often retained for freeze protection, resilience, or load spikes.
Can I prioritise renewables and only use gas if needed? +
Yes — we design logic that favours low-carbon inputs and only uses gas when needed.
How does backup integrate with thermal stores? +
Stores help bridge the gap — they allow heat pumps or solar to pre-load capacity and reduce gas runtime.
Can DTS support hybrid upgrades to existing systems? +
Absolutely — we often retrofit hybrid solutions into existing energy centres or decentralised schemes.

Design with Flexibility in Mind

DTS helps you build systems that adapt — combining low-carbon sources with backup, without compromising on cost, compliance, or control.

RELATED READS

Explore our detailed guides on designing effective, future-ready district heating systems. Each article is written to help clients, developers, and stakeholders understand what great network design looks like in practice.

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Decarbonisation Strategies in District Heating

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