Online Tools
Free calculators for heat network planning
Small, freely usable calculation tools from our knowledge base — right in your browser, no sign-up required. The collection keeps growing.
Pipe Sizing (DN Calculator)
Determine the nominal size of a heat network pipe from connection capacity, temperature spread and allowable pressure gradient — for hot networks and cold district heating (water or water-glycol), checked against the pressure-gradient and velocity criteria.
Open calculatorPump Sizing (Network Pump)
Determine the operating point of the network pump from heat output, temperature spread and the pressure losses of the most critical supply path — with flow rate, pump head, electrical power, annual electricity demand and a check of the pump electricity share.
Open calculatorLevelized Cost of Heat (VDI 2067)
Calculate annual costs and LCOH using the VDI 2067 annuity method — from investment, funding, discount rate, energy and operating costs, including price-dynamic energy costs and a breakdown by cost group.
Open calculatorBEW Operating Cost Subsidy (Heat Pump)
Calculate the subsidy rate and total under BEW Module 4 for central heat pumps — from SCOP and electricity supply (grid or direct renewable), with the annual subsidy and the total over the 10-year funding period.
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