Heat Only
Boilers

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What is a Heat Only boiler?

Heat Only boilers, also known as regular, conventional, or open vent boilers, are the perfect choice for homes with older heating systems, multiple bathrooms, or low water pressure. Working with a hot water cylinder and expansion tank, they deliver stable heating and hot water without alternating pressure, even when several taps or showers are running at the same time.

Upgrade to a modern, high-efficiency Heat Only boiler and enjoy reduced energy bills, reliable performance, and compatibility with your existing system.

  • Exceptionally efficient
  • ErP A-ratings
  • 90% Efficiency levels
  • Reduced Energy Waste
  • Rapid hot water delivery
  • Straightforward Installation
  • Minimal maintenance requirements

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Why Choose a Heat Only Boiler?

  • High Efficiency for Lower Bills: Modern models achieve up to 94% efficiency, helping you save as much as £340 per year on energy costs.
  • Perfect for Busy Homes
  • Compatible with Existing Systems
  • Reliable Brands and Outputs: Choose from trusted brands like Baxi, Worcester Bosch, Viesmann, ideal boilers and Vokera, some of the prestigious boiler brands installed by Appollo Gas Services, with outputs starting at 12kW for smaller homes up to larger capacities for high-demand households.
  • Long-Term Peace of Mind: 10-year warranties.

Professional Installation and Servicing

Our Gas Safe-registered engineers provide expert Heat Only boiler installations across Newcastle, Sunderland, Durham, and surrounding areas. We tailor every installation to your home’s heating needs, ensuring maximum efficiency and long-term reliability.

  • Safe, Certified Installations: Highest safety and quality standards.
  • Transparent Fixed Pricing: No hidden fees.
  • Minimal Disruption: Get your new boiler running quickly.
  • Flexible Finance Options: Spread the cost with 0% APR available.
  • Annual Servicing and Repairs: Keep your Heat Only boiler in good condition and extend its lifespan with our regular boiler servicing plans and boiler repairs.

Combi Boiler Repairs

We always recommend that your boiler be serviced at least once a year. These appliances play a significant role in keeping our homes warm and comfortable, so we must take care of them for a variety of reasons.

Annual Heat Only boiler servicing keeps your system safe, efficient, and under warranty, ensuring reliable heating and hot water. Book your service online in minutes.

Why Choose Appollo Gas?

With over 38 years of experience, we’ve built our reputation on delivering heating solutions that combine quality, reliability, and value.

  • Decades of Expertise: Serving the North East with trusted boiler installation, servicing, and repairs.
  • Comprehensive Installation Packages: Includes flue kit, magnetic filter, chemical flush, and more for optimal performance.
  • Strong Manufacturer Warranties: Up to 10 years’ coverage.
  • Rapid Response Support: Quick turnaround for repairs and emergencies.
  • Proven Customer Satisfaction: Backed by positive reviews from homeowners across the Northeast and surrounding areas.
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FAQs On Heat Only Boilers

What is a heat only boiler?

A heat only boiler works with a hot water cylinder, cold water storage cistern, and expansion tank to provide heating and hot water. They’re also known as regular, conventional, or open vent boilers.

How does a heat only boiler work?

It heats water and stores it in a cylinder, ready to supply multiple taps or showers at once without losing pressure.

What size heat only boiler do I need?

Most homes require at least 12kW, with larger outputs available for properties with higher heating and hot water demand.

How long will a heat-only boiler last?

With regular servicing, a heat only boiler can last 10-15 years or more.
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