Zero Carbon ® Consulting Service

I hope my Fab-Four recipe for going zero (explained in both the books and the free webinar) is detailed enough for you to cut your bills substantially and get to a zero-carbon footprint on your own. However, if you feel you need some further guidance in going zero, then please see my Zero Carbon® Home consulting service described below.

My service is based on scientifically rigorous analysis of the energy flows into and out of your house (I have a degree in physics from Oxford University), I then add sound financially sound analysis (I have an MBA from Harvard Business School) to create a set of actions that will both cut your bills and carbon emissions. I am completely independent, I do not work for, get paid by, sell products for or take commissions from any manufacturer of heat pumps, solar panels, insulation, windows or any other product I may recommend. Neither do I take money from any company selling loans.  My advice is given free of these financial conflicts of interest.

For several years I have consulted to homeowners who asked for my help in cutting their energy bills and carbon emissions. So far, I have helped about 25 homeowners to do so. A typical project has cost the homeowner about $1,500 and they have usually saved far more than this in the first winter. Homeowners give me great reviews, like the following:

“Working with David Green was an absolute pleasure, he guided me through the process with his experience in lowering my energy expenses and my overall carbon footprint.” DS, Long Island, NY.

“I wholeheartedly endorse David Green as a home energy consultant. He used his expertise in energy efficiency to focus on cost-effective solutions. As a result of following his suggestions, my house has significantly reduced energy consumption along with improvement in the overall comfort of my home.” – LA, Westwood, MA.

“I couldn’t have done it without you!” “Read his book!” – KA, Arlington, MA.

“we found your report to be very helpful indeed!” – ML, Needham, MA

These projects are very effective, but they have taken a lot of time. My goal is to help as many people as possible, so I have invested many hours to streamline the analysis of the energy flows in houses and financial impacts of adding the Fab Four. As a result, I have been able to cut in half the amount of time it takes me to analyze each house and write a report. Therefore, I can now offer my consulting service to homeowner at half the price of my original service. I now offer the energy/financial assessment for a flat fee of $750 per home. You can download an example of the report I write here:

Please email me at if you are interested in this service.

This service is currently only available in MA, for detached single-family homes. If your house is not in MA, or is a double or triple decker or an apartment, I can still help you but probably not for the same price. Please email me at:  if you are interested.

You can reach me at

The books, reports, website (including blog posts), webinars, website downloads and other form of communication (including the author’s answers to people’s questions in any form, written or oral) refer to the author’s opinions and experience with energy efficiency improvements, investing, tax, finance and regulations but neither the author, nor Zero Carbon® LLC is giving investment, tax, financial or legal advice, nor offering any warranty or guarantee of results.

The mark Zero Carbon® is a trademark of Zero Carbon® LLC registered with the United States Patent and Trademark Office with numbers 5,730,207 and 5,944,678. Use without the written permission of Zero Carbon® LLC may be a violation of law. In addition, the trademark has been recorded with the U.S. Customs and Border Patrol to prevent the importation of articles bearing unlicensed versions of the trademark. For permission requests contact: email David Green

Copyright © 2020 to 2023 David Green.  All rights reserved. No part of this publication, electronic or printed, may be reproduced, distributed, or transmitted in any form or by any means, including photocopying, recording, or other electronic or mechanical methods, without the prior written permission of the publisher, except in the case of brief quotations embodied in critical reviews and certain other noncommercial uses permitted by copyright law. All commercial use is prohibited. All photographs and illustrations are copyright © David Green, unless otherwise credited.