Consultations

MCS Consultations - key to the renewables industry

MCS conducts consultations to gather feedback covering a range of opinions from industry on proposed changes to the MCS Standards. We urge all stakeholders across the sector to respond to the consultations and provide feedback on the changes. Consultations may cover a range of topics within MCS Standards, Scheme documents and consumer protections.

Who can respond to MCS Consultations?

Ensuring that our standards are fit for purpose requires input and feedback from a wide range of professionals across the renewables industry. Our consultations typically attract feedback from installers, consumers, manufacturers, trade associations, certification bodies, consumer groups, educators, and independent specialists depending on the consultation topic.

Live MCS Consultations

Our live consultations are listed below, along with instructions on how to respond and deadlines for responses.


Date	Deadline for responses	Name of consultation	Description	Status	How to respond
04/08/2025	15/09/2025	MIS 3005-D: Heat Pump Design Standard	MCS has launched a six-week consultation on the inclusion of air-to-air heat pumps for the Heat Pump Design Standard.		Respond here.
04/08/2025	15/09/2025	MCS 007: Heat Pump Product Standard	MCS has launched a six-week consultation on the inclusion of air-to-air heat pumps for the Heat Pump Product Standard.		Respond here.

Concluded MCS Consultations

Our most recently concluded consultations are listed below with the consultation outcome and next steps if any.


Date	Date closed	Name of consultation	Description of Consultation	Outcome
05/06/2023	17/07/2023	MCS Scheme Redevelopment	MCS consulted on the redevelopment of the Scheme. The proposals outlined in the consultation aimed to reduce the complexity of the Certification Scheme that sit around MCS Standards, and to reset the Scheme’s consumer protections to give people the confidence that they need to engage with small-scale renewables.	Please view proposal outcomes on the Scheme consultation page here.
30/11/2023	26/01/2024	MCS 020 – Planning Standard for Permitted Development	MCS consulted on the planning requirements for Air Source Heat Pumps in domestic properties. Read more here.	Read the consultation response here. MCS 020 has now been updated, read the latest update and view documentation here.
12/02/2025	12/03/2025	Thermal Energy Storage Systems (TESS)	MCS has published a four-week consultation on the requirement for a design and installation standard and a pre-sale System Performance Estimate (SPE) methodology for electrically charged Thermal Energy Storage Systems (TESS). Find out more here.
15/04/2025	19/05/2025	Financial Protection	MCS has published a four-week consultation on proposed changes to its requirements for financial protection in the small-scale renewable sector. Read more here.	Read our response here.
25/06/2025	06/08/2025	System performance estimate Standard for air-to-air heat pumps	MCS has launched a four-week consultation on a new MCS Standard to include an air to air heat pump system performance estimate standard and calculator tool. View more information here.