Lack of information on the installer schemes that form part of the Green Deal is likely to cause confusion, according to the Association of Plumbing & Heating Contractors.
"It may be in the best interests of plumbing and heating contractors to await more detailed information so that they can fully consider their options and economise on scarce resources," the Trade Association advised.
APHC said the Department of Energy & Climate Change (DECC) will have two installer schemes in place in late 2012, the Microgeneration Certification Scheme and the Green Deal Installer Scheme, says the APHC.
"What is clear is that the Green Deal will include the possible financing of microgeneration measures in properties.
"What's not clear at the moment is how these two installer schemes will overlap. In terms of microgeneration installation, will participation on either automatically infer eligibility for customers to gain financial support on both RHI and the Green Deal scheme?
"The future also looks particularly muddy with both RHI and Green Deal requiring that work undertaken should be confirmed as being compliant with Building Regulations, bringing membership of a Competent Persons scheme into the equation as well."
The APHC insists there is "still much to be worked out on the application of RHI and the Green Deal".
The trade association is waiting for full operating details of the financing schemes to become available in late 2011/early 2012 before making a final decision on which schemes it will offer to members.