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Frequently Asked Questions

Greenstar have over 28 years of experience providing excellent plumbing, boiler, drainage and heating services throughout the UK. Our experts have answered your most popular questions below, that will hopefully give you a fast answer to your burning question! If you want to find out information such as our boiler guarantees, boiler finance options, and how qualified our team are, you’re in the right place! If your question isn't answered in our FAQs, please contact our team who will be able to answer your heating & plumbing queries on 01202 355 344.  

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Greenstar - FAQ


Boiler Frequently Asked Questions

Greenstar has been established since 1990, and our team’s first-hand experience has set us apart from our competitors in Dorset and Hampshire. We’re one of the leading plumbing, boiler, heating and drainage businesses in our local area, with years of providing high-quality installations and services that can be browsed in our case studies. Contact our experts today on 01202 355 344 to find out more.

Our team of nine engineers have all received extensive training and qualifications from Checkatrade, Criminal Records Bureau, Gas Safe and PASMA. The team’s dedication and excellent customer service skills have earnt us a 9.95 rating on Checkatrade, with a positive reputation across Dorset, Hampshire and Wiltshire.

Yes, we offer free estimates and quotations for all customers. To receive a free quote for any potential boiler, plumbing, heating or drainage services please contact us on 01202 355 344.

Yes, we’re an authorised and regulated credit broker, offering Worcester Bosch boilers on finance via Hitachi Finance as well as finance for Glowworm and Vaillant boilers. Unfortunately, we do not offer finance for any other boiler brands currently, but we hope to soon in the near future.

We provide a 12-month workmanship guarantee for every project we provide offering our customers peace of mind. Find out more about our boiler service and installation services, plus the range of boiler manufacturers we work with.

We accept cash, cheque, credit or debit card, we do accept bank transfer payments but this payment method must be agreed in advance with our team. Finance is available for boiler installations. To find out whether you’re eligible to make a payment through a bank transfer please contact us on 01202 355 344.

A combi boiler provides both heating and hot water options. We recommend combi boilers as they can save homeowners money in installation time and in the long run.

For all emergency drainage, plumbing, boiler and heating projects we are guaranteed to arrive at your property within 2 hours. Find out more by calling 01202 355 344.

Heating and hot water products are required to have an ErP rating, which is short for 'Energy-related Products', ranging from A++ to G to demonstrate their efficiency. An 'A-rated' boiler is highly efficient.

The Gas Safe Register is the official gas registration body for the UK. Businesses and individuals must be on the Gas Safe Register to legally work on gas appliances. Always check for the Gas Safe ID card before letting an engineer into your home.

Yes, we always have an engineer available 24/7 for emergency call-outs outside of normal operating hours.

We charge a minimum of one hour for all jobs, followed by 30-minute increments.

We offer fixed price quotes which are offered upfront, any additional parts or labour will always be quoted in advance and only once you've accepted our quote will we carry out the work.

A gas safety certificate demonstrates that your gas appliances have been fitted, serviced and/or checked to meet the latest safety standards. Landlords are legally required to conduct gas safety checks every year for the safety of their tenants.

We hold public liability insurance (up to £2m) and employer's liability insurance (up to £10m).

A smart thermostat enables you to control your heating like a regular thermostat but from your phone or tablet.

A thermostatic radiator valve (TRV) help you control the temperature of each room in your home, reducing unnecessary demand on your boiler.

A condensate pipe is an overflow pipe that enables your boiler to dispose of condensation to an outside drain.

Powerflushing chemicals through your central heating system using an external high-pressure pump is more effective than a standard chemical clean and can remove more corrosion, sludge and oxide build-up than standard flushing would.

A combination boiler heats water directly from the mains as and when required. Combi boilers do not require a hot water cylinder and/or storage tank and are suited to smaller homes with limited storage space.

A system boiler heats water from the mains and stores it in a hot water cylinder. System boilers are best suited to larger homes with limited storage space as they do not require a cold water storage tank.

A regular boiler heats water from the mains and stores it in a hot water cylinder. Regular boilers, sometimes known as conventional or open vent boilers, are best for larger homes with storage space as they also require a cold water storage tank.

A flue is where exhaust gases exist your boiler, typically found directly behind your boiler through an external wall.

A condense pipe is an overflow pipe that enables your boiler to dispose of condensation to an outside drain.

Testing your flow rate determines how many litres, and how fast your boiler can heat hot water.

No, you can get the boiler installed on finance with no deposit.


Have we answered your question? For more information about our plumbing, heating, drainage and boiler services. 

Contact our team on 01202 355 344 today!

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