FREE Gas Boiler & Underfloor Insulation grants available

If your current gas boiler is 6+ years old or broken and you have suspended wooden floors then please contact us for a FREE survey as you maybe eligible for an upgrade on your boiler.

Replacing your gas boiler and insulating your wooden floors could cut your heating costs considerably, and make your home more comfortable.

Our Services


FREE Boiler Scheme

Check if you are eligible for the FREE Boiler Scheme which is a boiler grant available to help start saving on your energy bill.

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ECO 3 Grants

Find out all about ECO3 grants. What it all means to you and available funding for cavity wall, loft insulation, electric storage & heating replacements

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LA Flex (Local Authority Flexible Eligibility)

Local Authority Flexible Eligibility known as LA Flex is help with installing energy saving measures in premises that have been declared eligible by your local authority

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External Wall Insulation (EWI)

There are grants available for external wall insulation known as (EWI) funding. You may have had someone tell you that they got a grant for their EWI, find out how.

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Internal Wall Insulation (IWI)

There are grants available for internal wall insulation known as (IWI) funding. You may have had someone tell you that they got a grant for their IWI, find out how.

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Ground Source Heat Pump (GSHP)

With our Ground Source Heat Pumps you could receive a cash payments over seven years if you install an eligible renewable heating technology

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Air Source Heat Pump (ASHP)

With our Air Source Heat Pumps you could receive quarterly cash payments over seven years if you install an eligible renewable heating technology

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Is my home suitable for a Heat Pump?


Does my home need to be well insulated to have a Heat Pump installed?

Since ground source heat pumps work best when producing heat at a lower temperature than traditional boilers, it is essential that your home is well insulated for the heating system to be effective. If you are unable to insulate your house for a particular reason (i.e Listed Buildings), then a higher capacity heat pump ca be specified or a heat pump with a higher temperature output can be installed.

Is my garden big enough for a Ground Source Heat Pump?

Your garden doesn't have to be particularly big, but the ground needs to be suitable for digging a trench (horizontal loops) or a borehole (vertical loops) and be accessible to digging machinery. 

Are grants available to reduce costs further?

Yes, the government introduced Renewable Heat Incentive for ground source heat pumps installed in domestic buildings at 18.8 p/kWh on 9 April 2014. The current price is at 20.89 p/kWh 

Will it really save me money compared to my current fuel costs?

The system will pay for itself much more quickly if it's replacing an electricity or coal heating system. Heat pumps may not be the best option for homes using mains gas. You can save even more money and also carbon emissions by generating electricity through solar which will run the heat pump. Potentially, this could mean your property produces zero carbon emissions 

About Us


About Us
Duoserve was set up by two close friends In October 2017. With a combined experience of 20 years in the energy sector, Ali and Dan have helped hundreds of customers claim government grants towards heating and insulation measures. We do not only help customers in need of support, but also cover the private sector of work for Solid Wall Insulation and renewable heat pumps. Duoserve will carry out the required survey at the property and choose a professional and reliable installer.  We will always make sure the customer has a top quality service hence why we only work along side the best.

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  • Regus House, 4 Admiral Way, Doxford International Business Park, Sunderland, SR3 3XW