Rinnai Energysaver 309FT Heater with Power Flue – K309FTN/K309FTL

SKU: K309FT Categories: ,

The 309FT Energysaver is the smallest model. Due to its compact size it is ideal for heating smaller living areas and with its ‘room sealed’ power fluing system, the 309FT is one of the only heaters ideal for bedrooms.

Unit comes complete with the Rear wall Power Flue.

Enquire About This Product Call 1300 137 567

More Information

  • Efficiency rating of 4.6 Stars – amongst the highest available for flued space heaters, reducing your heating costs
  • Heats up to 49 m2
  • Superior indoor air quality with zero emissions into the room – perfect for those who may be susceptible to allergies or respiratory problems
  • Power flue allows flexibility with multiple installation options
  • Full Electronic Thermostatic control. Select a desired temperature which is then maintained by the heater
  • Dual digital Timers allow for on and off programming for both mornings and evenings
  • Pre-heat mode ensures your room is pre-heated by the time programmed
  • Economy mode allows the heater to modulate down after 1 hour when set temperature is reached. Reduces running costs with no noticeable change in temperature
  • Inbuilt Humidifier Tray, easy way to humidify indoor air for greater comfort
  • Child Lock prevents unwanted access
  • AGA Certification Number 5209 to AS4553/2008
  • Warranties
    • 1 year – Parts and Labour
    • 2 years – Fan (part)
    • 10 years pro rata – Heat Exchanger (part)
    • Commercial Use – 1 year Parts and Labour
Installation Options

The Rinnai EnergySaver Direct Flue Kit supports Flueing Option 1 in the diagram and is a part of most other flue kits. It is supplied with all Energysaver Heaters except the 1004FTR where it must be added to any flue kit or purchased on its own for rear wall flueing.


  • Rinnai Energysaver 309FT Flue Kit 2
  • Rinnai Energysaver 309FT Flue Kit 4
Heating FAQ’s

1. What is a heating changeover?

A heating changeover is the replacing of an old heating unit with a new one with similar physical properties.

2. Why change my model over instead of installing a new one?

Changing over a model is far less time consuming and thus significantly cheaper than installing a brand new model.

3. When is it time to get a new heater?

There are two common ways to know when the time has come to change your ducted gas heating. If you find that your utility bills are getting out of control, you may realise that your ducted gas heater is spending far more gas than it needs to – and a new, more efficient model is needed to cut your bills. The other reason is fairly simple – you’ve turned it on, and the air isn’t flowing!

4. My heater is malfunctioning but I’m worried about the coronavirus, is a changeover an “essential service” and how can I minimise contact with my installer?

Yes, as of April 1 2020, installing a heater appears to be considered an essential service in Victoria. This is of course open to change, and thus G-Store is unable to accept any responsibility or liability for this advice, but our installers are still working and available to give you a hand. Our expert team are still on the phones, and can help arrange a contactless changeover!

5. What’s new since last I installed a ducted gas heating system?

The big answer for that one is zoning*! You can now regulate where and when your heater sends the warm air, and where and when it doesn’t. For example, on cold nights, you can run the heater in your bedroom and keep it off in living areas. If you’re working from home, you can run it in your working space and keep it off in the bedroom until 5pm! *Available on select models.

6. How do heating capacity and airflow options work?

Kw/h relates to how much energy is produced per hour. Generally, 1 kW of heating is needed per square foot of space. As a rough guide we suggest:

Very cold zone: 1kW output per 8.5m²

Cold zone: 1kW output per 10m²

Cool Zone: 1kW output per 13 m²

Mild Zone: 1kW output per 16m²

Alternatively, you can try find the model number of an existing heater and try match it.

The airflow options are standard air or extra air. The extra air option enables for increased airflow.


All of our products are inspected by our experienced staff for quality and/or damage before sale or despatch.

If you have any issue with your purchase, please call G-Store on 1300 137 567 without delay. Make sure you have a copy of your invoice to hand. We will be happy to discuss the options that best solves the problem. Please do not return goods without our explicit instructions.

G-Store ships most of our products anywhere in Australia. You can also pick up free from our Melbourne store.

Shipping Cost Options

To offer you the most cost-effective shipping fees we use the Temando freight engine to dynamically search among available carriers and offer you

  1. The cheapest rate
  2. The fastest service

These are the two best options available at the time from among our carriers for your particular products to your specific location, wherever it is in the country.

We do not post to PO boxes.

Free Pick Up
If your delivery is to a Postcode within 150 km of G-Store in Melbourne (Keysborough) you will also be offered a Pick-Up In-Store option. If you select this, we will let you know as soon as your purchase is ready for Pick Up.

Keysborough – same day on stocked items if ordered before 2pm, next day after 2pm.

Warragul – next day on stocked items if ordered before 11am, otherwise add 1 business day.