# How does a solar hot water controller work?

## How does a solar hot water controller work?

A solar hot water service works by efficiently transferring the heat of the sun to a building’s water supply. Special solar collectors are used to heat the water (or an antifreeze heat transfer fluid) on a property before sending it to the rest of the home.

How do you size a solar hot water system?

For a quick residential system estimate, the general rule of thumb is that your south-facing roof/surface needs a minimum of 20 square feet of collector area for each of the first two people in the home. For each additional person using hot water, add a minimum of 12 to 14 square feet.

How do I know if my solar hot water is working?

Look for “Hot Water” or “Water Heater” on your power switchboard. Then check if there is a timer on the booster which is cutting it off when you need hot water. If you suspect the unit is receiving no power, it’s best to call a professional in to inspect the situation.

### How many Litres of hot water does a person use per day?

In a home with average consumption, you’ll need 30 to 50 litres of hot water per person per day. In a high-consumption home, you’ll need 50 to 70 litres of hot water per person per day.

How do I test my hot water flow rate?

Simply, take the amount of water in the jug in litres and multiply this by 10. This will give you your flow rate in litres per minute. For example, if you have a 500ml jug, that would be 0.5 litres x 10 = 5 litres per minute.

How do you calculate hot water flow rate?

If you don’t know the flow rate, estimate it by holding a pan or bucket under the faucet or shower head and measure the flow for a minute. The flow rate through the demand water heater should be at least 3.25 gallons (12.3 liters) per minute. To reduce flow rates, install low-flow water fixtures.

#### How do you install a water flow meter?

Flow Meter Installation Guidelines

1. Necessary upstream and downstream straight-pipe lengths.
2. Beta ratio (ratio of oriﬁce bore diameter to pipe diameter: β = d/D )
3. Impulse tube tap locations.
4. Tap ﬁnish.
5. Transmitter location in relation to the pipe.