IGNI

IGNI, air source heat pump installer with government grant

IGNI is a British company dedicated to replacing gas boilers with air source heat pumps, taking advantage of the government's Boiler Upgrade Scheme (BUS). The company presents itself as a team of heating engineers and energy advisers, not a call centre, and states it has completed over 1,200 installations.

Its activity focuses on England and Wales, where the BUS offers grants to homeowners who replace fossil fuel or electric heating systems with low-carbon alternatives. IGNI handles eligibility checks, carries out the technical survey, submits the application to Ofgem and completes the installation.

Two upgrade routes: heat pump and boiler replacement

The company structures its offering into two main programmes, both subject to eligibility criteria:

• Air Source Heat Pump: installation of an air source heat pump at no cost to the eligible customer. Includes home survey and system design. No income or means test applies. Available in England and Wales.
• Boiler Upgrade: replacement of the existing boiler with an air source heat pump, funded through the Boiler Upgrade Scheme. Includes home survey and application management by IGNI.

In both cases, the company states there is no upfront cost for households that meet the requirements and that the grant is deducted directly from the installation invoice.

Work process: from application to handover

IGNI describes a four-stage procedure:

• Eligibility check: the interested party answers a few quick questions online or speaks with the team, who confirm in minutes whether the home meets the requirements.
• Free survey: an MCS-certified engineer visits the property to assess the building and recommend the right heat pump.
• Grant application: IGNI prepares and submits the BUS application to Ofgem on the customer's behalf and keeps the applicant informed.
• Installation and handover: the heat pump is installed and commissioned, its operation is explained and the documentation is handed over.

The company notes that a standard boiler replacement is usually completed in one day, while installing a heat pump typically takes between one and two days, depending on the complexity of the system and the characteristics of the home.

Certifications and technical guarantees

IGNI highlights that all installations are carried out by MCS-certified engineers, an essential requirement to access the BUS grant. It also states that its engineers are Gas Safe registered and fully insured. Each installation, according to the company, complies with manufacturer standards and applicable building regulations.

Customer profile and area of operation

The service is aimed at homeowners in England and Wales who wish to replace their heating system with an air source heat pump. The company stresses that there is no income limit to access the grant and that most owner-occupiers can qualify. To qualify, an existing fossil fuel or electric heating system must be replaced; the old boiler cannot be kept as a backup.

Grants available through the Boiler Upgrade Scheme

The Boiler Upgrade Scheme is a UK Government grant programme that offers up to £7,500 for low-carbon heating systems, typically air source or ground source heat pumps. For biomass boilers, the support amounts to £2,500. The grant is applied directly to the installation cost and deducted from the invoice; it is not paid in cash to the applicant.

Ratings and customer service

The company holds a 4.5-star rating on Trustpilot, according to its own presentation. IGNI emphasises communication, quality and aftercare, and states that it offers honest advice on whether a heat pump, a boiler replacement or neither option is right for each home. Support is provided by phone, email or callback request.

Company details

IGNI operates under the company name SAR Digital Ltd, with company registration number 14363778. The company has a Carbon Reduction Plan and a Net Zero Strategy for 2050.

Location and contact

Phone: 0333 880 5338 · Email: admin@igni.org.uk