Frequently Asked Questions

An air source heat pump is an energy-efficient heating system that extracts heat from the outside air and transfers it into your home. It works like a refrigerator in reverse, providing both heating and hot water efficiently even in cold temperatures.

Boiler installation costs vary depending on boiler type, property requirements and any additional work needed. Simple combi swaps start from £2,295. For a qualifying simple same-position 24-25kW combi swap on selected boilers. Nimbus confirms the final installed quote after checking the supplied answers and installation photos. Many 30kW combi swaps are around £2,300-£3,000, while conversions, boiler moves, cylinder work and larger system changes can move projects into £2,800-£5,500+. The instant journey gives a fitted estimate from your answers about the boiler, flue, gas run, cylinder setup and installation complexity; Nimbus confirms the final written quote after scope review.

Yes. The current Boiler Upgrade Scheme grant for an eligible air source heat pump is £7,500, subject to the live official criteria. Latest grant values: The Boiler Upgrade Scheme offers £7,500 for air-to-water heat pumps, £2,500 for air-to-air (A2A) heat pumps, £7,500 for ground-source or water-source heat pumps and £5,000 for eligible biomass boilers. Eligible off-gas properties replacing oil or LPG can receive £9,000 towards an air-to-water or ground-source heat pump until 31 March 2027, subject to official criteria. Nimbus checks the live GOV.UK and Ofgem position before quoting or progressing an application.

A like-for-like combi boiler swap is typically completed in 1-2 days. System changes (such as conversions to a different boiler type or system boiler installations) can take up to 7 days depending on the complexity of pipework and any additional work required.

Payment depends on the job. Nimbus can take secure card payments where online checkout is available and formal quotes or invoices will state the agreed payment terms clearly before work goes ahead. No finance plan is advertised unless an active provider option is confirmed on the quote.

Manufacturer warranty length depends on the boiler model, installation and servicing requirements. Nimbus confirms the warranty position before the job is booked and workmanship terms are stated with the relevant quote or invoice.

Nimbus Boilers, Heat Pumps & Renewables is publicly listed as Gas Safe registered business 983367. Before regulated work is accepted, Nimbus confirms the attending engineer and required categories for the appliances in scope. You can verify both at gassaferegister.co.uk.

Annual servicing is recommended by boiler manufacturers and Gas Safe to ensure safe and efficient operation. Regular servicing helps prevent breakdowns, extends your boiler's lifespan and maintains its efficiency rating.

Gas work requires an engineer registered and qualified for the appliance and work involved. A boiler service typically covers safety, efficiency and key components, including the heat exchanger, burner, controls, flue and pressure levels, plus checks for gas leaks and carbon monoxide risks.

Nimbus handles repair enquiries across common domestic boiler brands including Worcester Bosch, Vaillant, Ideal, Baxi and Viessmann. The first step is to check the fault code, pressure, symptoms and appliance details so the repair advice is sensible.

Yes. Nimbus handles urgent boiler repair enquiries during answered hours, Monday to Friday 08:00-16:00 and will aim to respond as quickly as the diary, parts and safety allow. If you smell gas or suspect carbon monoxide, call the National Gas Emergency Service on 0800 111 999 immediately.

Nimbus is based in Scunthorpe and covers North Lincolnshire plus nearby towns within roughly 30 miles, including Brigg, Barton-upon-Humber, Gainsborough, Goole, Grimsby, Cleethorpes, Doncaster, Market Rasen, Caistor, Immingham, Epworth, Crowle and surrounding villages where the diary and job type make sense.

A combi (combination) boiler provides both heating and hot water directly from the unit, without needing a separate water tank or cylinder. It heats water on demand, making it compact and efficient for homes with limited space.

A system boiler is a sealed system that heats water in a cylinder. It requires a hot water cylinder (either vented or unvented) to store hot water. For vented systems, a cold water storage tank in the loft is still required to supply the cylinder. The key difference between a system boiler and a heat only (regular) boiler is that system boilers have built-in components including an expansion vessel, pump and pressure relief valve - making them pressurised systems that don't require these separate components. System boilers are ideal for homes with multiple bathrooms as they can maintain hot water pressure across several outlets simultaneously without pressure loss.

Nimbus can support air source heat pump projects with proper design checks, including heat loss, emitter checks and the correct approved grant and compliance process where relevant. They are a lower-carbon option that can work very well in the right property, but suitability must be checked before quoting.

Gas Safe Register is the official gas safety body for the UK, replacing CORGI as the gas safety register. Gas engineers must be registered and hold the required categories for the work they perform. Nimbus is Gas Safe registered as business 983367. Ask to see your engineer’s Gas Safe ID card and the qualifications listed on it.

Many boilers last around 10-15 years with proper maintenance and some last longer. If your boiler is over 10 years old, unreliable, inefficient or becoming expensive to repair, it is sensible to compare repair costs against replacement.

Common signs include: frequent breakdowns, rising energy bills, unusual noises (banging, gurgling), yellow flame instead of blue, water leaks, boiler over 10-15 years old and difficulty finding replacement parts. If repairs cost 50% or more of a new boiler, replacement is usually better value.

Flexible payment options may be available through our secure Stripe checkout where supported. Availability, payment terms and affordability checks are handled by the payment provider, so Nimbus will not promise a finance term until checkout confirms what is available for your quote.

Customers can request Worcester Bosch, Vaillant, Ideal, Baxi and Viessmann boilers. Nimbus matches the recommendation to the property, hot water demand, warranty priority and budget. Regulated gas work is accepted only after the attending engineer and relevant category are verified for the requested appliance and scope.

A standard boiler service typically costs between £70 and £150 depending on your location and boiler type. Contact us for the current price. Manufacturer warranty or guarantee requirements vary by product and current terms; many require annual servicing and suitable records.

Combi boiler: Single compact unit that provides both heating and hot water on demand without tanks. Best for 1-2 bathroom homes with good water pressure.

System boiler: Sealed system with a hot water cylinder but no loft tank. Ideal for homes with 2+ bathrooms needing higher hot water demand.

Regular boiler: Traditional system requiring both a loft cold water tank and hot water cylinder. Best for older homes with existing traditional systems.

Yes - it's a legal requirement for landlords to have a carbon monoxide alarm in any room with a fixed combustion appliance (except gas cookers). For homeowners, it's highly recommended for safety. Alarms must comply with BS 50291 standards. We can supply and fit a compliant alarm as part of your installation.

A CP12 is the familiar name for a landlord gas safety record. It documents the gas appliances and flues included in the check, the engineer's findings and any safety action required. Landlords must arrange checks at the required intervals. Nimbus can provide a record only where the attending engineer's current Gas Safe categories cover every appliance in scope, so please confirm the appliance list when booking.

You may be able to get support through the Energy Company Obligation if your household, property and delivery path meet the current official criteria. Because the rules and supplier or local-authority options can change, Nimbus checks the live eligibility path rather than promising a blanket free boiler offer.

A new A-rated condensing boiler can save up to £300-£400 per year on energy bills compared to an old G-rated non-condensing boiler. Actual savings depend on your property size, insulation, usage patterns and the efficiency of your current boiler. You'll also benefit from improved reliability and lower repair costs.