Identify both meter boundaries

Record what the heat meter measures and whether it covers delivered load heat, storage charging or another circuit. Separately map electrical input to heaters, heat pumps and circulation. A heat meter may record energy shifted in time through storage rather than new heat generated in that interval. Use consistent signs and periods before comparing totals.

Apply the supported conversion case

Hypothetically, delivering 9 kWh of heat through a system requiring 3 kWh of electricity does not justify subtracting 9 kWh from the site electricity meter. If an alternative provides the same accepted heat with 2 kWh electrical input, the simplified avoided input is 1 kWh. These invented values exclude any unlisted energy source or auxiliary and are not equipment performance data.

State whether the proposed benefit is avoided electricity, avoided fuel or delivered heat. Those can all be useful project outputs, but combining them without an explicit conversion and counterfactual can duplicate the claimed benefit.

Reconcile the actual change in purchases

Compare the accepted old and new heating service, including added pumps, storage losses and retained backup where relevant. If the original system used fuel, keep that displaced fuel separate from electrical savings. Report wind electricity and delivered thermal energy as separate flows rather than crediting both independently to the same avoided purchase. Provide the meter map and supported heating-input relationship with the RFQ. Caleffi explains heat transfer and electrical input generally; it establishes neither a MARSTON heating product nor a guaranteed reduction in the site's electricity bill.