Revised Domestic RHI Biomass Boiler Worked Examples Now Available!

3 December 2014

The Domestic RHI Tariffs for biomass boilers have now been confirmed as being degressed by 10% in January 2015, we have added some worked examples to the Rainbow Heat and Power website.

The Effecta range is Rainbow Heat and Power's domestic biomass boiler range and includes the Effecta Komplett III wood pellet boiler and the Effecta Lambda Log boiler. Both have been specifically designed with the domestic market in mind.

Effecta Komplett III

The Komplett III wood pellet boiler has a built in hot water tank so does not need an accumulator, which is ideal for domestic properties, where space may be limited.

Effecta Lambda

The Effecta Lambda log boiler can also run on wood pellets via an easy to fit attachment. This gives great flexibility, with the user being able to benefit from the cheapness of logs as well as the automation of wood pellets.

The examples range from 20kW to 45kW, the largest biomass boiler that the Domestic RHI will pay out for. As most domestic installations would run on wood pellets or logs, we have based our examples on these two main fuel types. Find out more about where to find these fuels via the Biomass Suppliers’ List.

The 20kW example is based on an EPC of 26,280kWh per annum, equivalent to a 3 bed room house of roughly 350m2. A biomass boiler heating system of this size would generate payments of £2,286 per annum, which adds up to £22,110 over 7 years and can give a payback on the capital cost of the of as little as 3 years!

20 kW biomass boiler; EPC 26,280 kWh p.a

  • Equivalent To; 3 bed house of 350 m2
  • RHI Payments; £2,886 per annum or £22,110 over 7 years
  • Biomass System; cost £16,500 (pellets) - £24,500 (logs)
20kW Wood Pellet System
RHI £ Fuel Type Fuel Saving C02
Saving
Inst.
Cost
Pay
Back
(Yrs)
P.A Net
Annual

Mains Gas

N/A N/A 6.8t £16,500 6 £23,304
£2,886 Heating Oil £477 £5,297 8.8t 5 £27,408
Net LPG £703 £7,250 8.1t 5 £29,361
£22,110 Electricity £2,368 £21,662 13.4t 3 £43,772
20kW Log System
Annual RHI £ Fuel Savings C02
Saving

Inst.
Cost

Pay
Back
(Yrs)
Net
Gain
P.A Net
Annual Mains Gas £563 £5,485 6.8t £24,000 7 £27,595
£2,886 Heating Oil £1,037 £9,589 8.8t 6 £31,699
Net LPG £1,263 £11,542 8.1t 6 £33,652
£22,110 Electricity £2,928 £25,953 13.4t 4 £48,064

 

The range of worked examples goes up to 45kW, the largest biomass boiler currently accepted by the Domestic RHI.  This is equivalent to an EPC of 59,130 kWh or a 7 bedroom house or roughly 750m2
A biomass boiler heating system of this size would generate payments of £6,492 per annum, which adds up to £49,748 over 7 years and can give a payback on the capital cost of the of as little as 3 years!

45 kW biomass boiler; EPC 59,130 kWh p.a

  • Equivalent To; 7 bed house of 750 m2
  • RHI Payments; £6,492 per annum or £49,748 over 7 years
  • Biomass System Cost; £24,000 (pellets) - £27,000 (logs)
45kW Wood Pellet System
RHI £ Fuel Fuel Saving C02
Saving
Inst.
Cost
Pay
Back
(Yrs)
Net
Gain
P.A Net
Annual Mains Gas N/A N/A 15.3t £34,000 5 £52,433
£6,492 Heating Oil £1,073 £11,919 19.9t 5 £61,677
Net LPG £1,581 £16.313 18.31t 4 £66,062
£49,748 Electricity £5,328 £48,739 30.1t 3 £98,487
45kW Log System
RHI £ Fuel Fuel Savings C02
Saving

Inst.
Cost

Pay
Back
(Yrs)
Net
Gain
P.A Net
Annual Mains Gas £1,226 £12,341 15.3t £27,000 4 £62,090
£6,492 Heating Oil £2,333 £21,575 19.9t 3 £71,324
Net LPG £2,841 £25,790 18.3t 3 £75,718
£49,748 Electricity £6,588 £58,395 30.1t 3 £108,144

 

Find out more and see further worked examples here.

Alternatively, why not try our Domestic RHI Calculator and enter your own values to see what your payback may be. As always, get in touch via hello@rainbowheatandpower.co.uk or ring us on 01884 212 044.