Continuous Flow Water Heaters

Requirements for Installation

Position

500mm away from opening windows, internal corners, and external corners.

1.5m below opening windows minimum

1.5m up from the ground

As close as possible to the most commonly used hot water fitting.

Usually outside the bathroom or kitchen.

Close to a gas supply.

Requirements

Not more than 9m of 20mm gas pipe work. ie close to a large gas supply. Not the gas supply used for a storage water heater. Obviously you need to be on gas. If not we can arrange this for you.

Electrical hot point installed outside next to the water heater.

Good cold water supply. No iron water pipe work in the cold supply line.

No objects up against the outlet of the water heater.

The shower mixer is checked as it may need adjusting or replacement if it can not cope with the changed hot water pressure.

Cold water pressure needs to be under 800kpa. A pressure limiting valve may need fitting in a small number of cases.

How we work out the price

Most installations have around 20m of pipe work, either gas, cold water, and hot water combined. The pipe can be in any combination of lengths adding up to 20m. Eg 5m gas, 5m cold and 10m hot water piping.  Our standard prices are based on this. If more pipe work is required then we add to the price on the basis of the number of extra meters of pipe required.  eg extra 5m X $80/m = $400.00 extra on the standard price.  If the installation does not meet the position requirements the job can not go ahead until a suitable position is found.

Standard Prices in lnclude the water heater, electrical work, the plumbing pipework, the gas pipe work, the gas certificate and GST.

How we do the installation

Fit the new water heater to the wall

Run gas and water pipe work. The hot water is fed back into the existing plumbing where it is closest.

Install the electric hot point.

The old hot water connection to the existing hot water cylinder is plugged off. The new system is tested.

The old tanks are removed if possible or left drained.

The Market

There are several types of continuous water heaters on the market. Some require power supplies some dont.

Main Suppliers are Bosch, Rinnai, and Rheem. Out puts range from 16 liters per minute to 32.

The most common Rheem, Bosch and Rinnai units are 20 and 24 liter per minute models.

The Bosch Company also make hydro power units that do not need that generate there own electric power for ignition in the 13 to 16 liter per minute sizes. They are cheaper to install because of this. Internal models are also available but they are more expensive to purchase and install.

Electric Continuous Flow units

Not common as the electrical requirements are high due to the large power needed to heat water.

Alternatives  to Continuous Flow

Use large amounts of storage eg 270 litres.

If energy used or cost of heating is a concern use Heap Pump water heaters.