This is a heat loss calculation service where we will provide you with a full heat loss survey. Simply send us your plans by attaching them below in the contact form, fill out your name, email address, your address and site address if different. Then, we'll send back a detailed heat loss report. MCS-compliant performance estimate included Select your ideal heat source (ASHP, GSHP, Gas boiler), we will show cost/carbon comparisons in the report Tell us your p/kwh for electricity and gas for more accurate figures * No liability taken for incorrect material U-values being provided Plans must include materials type for all building fabric, without this we will assume the period standard. The service is £249 plus VAT and the invoice will be emailed to you in advance to pay before receiving the report.