Buffer Tank – Now Available in Mild Steel

McDonald Engineers offer a wide range of buffer tanks and accumulator tanks manufactured from not only copper but now in mild steel.

Buffer Tanks tend to be used in conjunction with renewable energy installations and in particular solid fuel systems, where the heat is dumped and stored in the buffer tank then used throughout the rest of the day.

This cuts down on the length of time the boiler is on and therefore reduces the associated boiler or heat pump cycling – which is when the boiler fires up and down to top up heat too regularly.

Boiler cycling is a key concern as it not only reduces operation life of heating equipment, increases breakdowns and the need for servicing but also increases fuel consumption and CO2 emissions.

Our buffer tanks are available from 100 litres up to 10,000 litres.

Contact us about our range of buffer tanks

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Powerflow Unvented Cylinders
Thermflow Thermal Store
Stainless Steel Cylinders
Open Vented Cylinders
Heat Pump Cylinders
Rectangular Hot Water Tanks
Electric Wet Hot Water Cylinders
Marine Calorifiers
Buffer Vessels and Tanks
Plateflow Heat Exchange
Renewable Cylinders
Time Saver
Feed and Expansion Tank
Fast Heat
Back Boilers
Cylinder Spares


Hot Water Cylinders Helpline from McDonald Engineers

Hot Water Cylinder Standards from McDonald Engineers


Buffer Tank