commercial selection guide

Typical commercial application	Indirect

Large House - 6 bed / 4 bathrooms	2x 210
Guest House - 8 bed / 4 bathrooms	2x 300
Small Hotel - 8 bed / 8 bathrooms	3x 210
Sports Pavillion (25 people / 4 showers)	2x 300
Sports Pavillion (25 people / 6 showers )	3x 210
Student House (25 people / 3 bathrooms)	3x 300
Old Peoples' Home (60 beds / 10 bathrooms)	5x 300 each supplying 2 bathrooms

Example illustration

A school swimming pool has 5 showers in each of two changing rooms. The shower heads are flow-restricted to 9 ltrs per minute (2/3rds of this will be hot water). Usually there are 3 one hour lessons each morning and three each afternoon. Assuming a class size of 30 children.

Maximum demand = 10 shower heads x 9 litres / min = 90 litres / min. This is more than one Tribune HE can supply. At least two Tribune HEs will be needed to provide this ( see flowrate graphs )

Total demand = 30 kids x 6 litres / minutes x 5 minute shower = 900 litres

3x 300 litre units will be required

Reheat time has to be a maximum of one hour so it is reheated in time for the next lesson.
A TI300 can reheat its entire contents in 60 minutes with a boiler power of 15kW. So total boiler power required = 45kW

If direct units were used it would have to be fitted with immersion heaters rated at 15kW (typically 1 x 9kW + 1 x 6kW)