How much power of burner is needed to heat a 500 square meter building by water circulation

The burner power required for hydronic heating of a 500 square meter building depends mainly on the building's heat load requirements. Here are the detailed calculation steps:

1. Estimate the building's heat load

The heat load of a building is usually calculated as the heat demand per unit area (W/m²). Depending on the building's insulation performance, climatic conditions and use, the heat load range is as follows:

Ordinary residential: 80-120 W/m²

Energy-saving building: 50-80 W/m²

Non-energy-saving building: 120-150 W/m²

Assuming that the building is an ordinary residential building with a unit area heat load of 100 W/m², the total heat load is:

500m²×100W/m²=50,000W=50kW

2. Consider system efficiency and heat loss

The hydronic heating system has a certain amount of heat loss (such as pipe heat dissipation, water pump energy consumption, etc.), so the burner power needs to be slightly higher than the calculated heat load. It is usually recommended to add a 10%-20% margin:

50kW×1.2=60kW

3. Burner power selection

According to the above calculation, a 60 kW burner can meet the demand. If the building is located in a cold area or has poor insulation performance, the power can be increased appropriately.

4. Other factors

Climate conditions: Cold areas require greater power.

Heating methods: The heat demand of different methods such as floor heating and radiators may vary slightly.

Hot water demand: If the burner also needs to provide domestic hot water, additional power is required.

5. Professional advice

It is recommended to consult a professional heating engineer for detailed heat load calculation and equipment selection to ensure efficient operation of the system. After calculating the required heat, we can match the appropriate burner for heating.

Summary

For an ordinary house of 500 square meters, the burner power required for water circulation heating is about 60 kW. The specific power needs to be adjusted according to actual conditions.