Energy advice for homebuyers

Last registered on September 10, 2021


Trial Information

General Information

Energy advice for homebuyers
Initial registration date
August 24, 2021
Last updated
September 10, 2021, 11:18 AM EDT


There are documents in this trial unavailable to the public. Use the button below to request access to this information.

Request Information

Primary Investigator

Sustainable Energy Authority of Ireland

Other Primary Investigator(s)

PI Affiliation
Sustainable Energy Authority of Ireland

Additional Trial Information

On going
Start date
End date
Secondary IDs
Prior work
This trial does not extend or rely on any prior RCTs.
A trial to investigate whether providing homebuyers with a free energy advice session increases rates of retrofitting in the homes they purchase.
External Link(s)

Registration Citation

Julienne, Hannah and Karl Purcell. 2021. "Energy advice for homebuyers." AEA RCT Registry. September 10.
Experimental Details


Homebuyers will be offered a free tailored energy advice session with a Building Energy Rating (BER) expert.
Intervention Start Date
Intervention End Date

Primary Outcomes

Primary Outcomes (end points)
Completion of home retrofitting works within (a) 3 months and (b) 6 months.
Primary Outcomes (explanation)
Rates of retrofitting will be approximated by the number of homes that applied for an SEAI grant and for which energy upgrade works have been completed. Unsuccessful applications (grant denied) will still be counted if works were carried out. Homes that undergo upgrades without applying to SEAI for a grant will not be captured.

Evidence of retrofitting will be assessed within (a) 3 months and (b) 6 months of the homebuyer completing the webform.

Secondary Outcomes

Secondary Outcomes (end points)
Secondary Outcomes (explanation)

Experimental Design

Experimental Design
Homebuyers in the treatment group will be offered a free energy advice session with a BER expert after going sale agreed on a new home.

Rates of retrofitting in these homes will then be compared with those in a control group for which no energy advice session was offered.
Experimental Design Details
Not available
Randomization Method
Randomization is predetermined in an excel file, where each new row is assigned to either condition with equal probability using random number generation. Participants are assigned to an experimental group in the order they are recruited according to this excel file. Mortgage advisors cannot choose what group a participant is assigned to.
Randomization Unit
Was the treatment clustered?

Experiment Characteristics

Sample size: planned number of clusters
600 homebuyers (minimum)
Sample size: planned number of observations
600 homebuyers (minimum)
Sample size (or number of clusters) by treatment arms
300 (minimum)

Recruitment will continue until 300 participants in the treatment arm are successfully contacted and schedule an energy advice session. Participants who turn down the offer of an energy advice session or who the energy advice company are unable to contact will still be included in the treatment arm for analysis.
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)

Institutional Review Boards (IRBs)

IRB Name
IRB Approval Date
IRB Approval Number