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# Choosing a Stove

# HOW TO CHOOSE A STOVE OR BOILER

# Factors that affect your decision:

**What you want to heat?**If you wish to heat a room then you are looking for a stove, if you wish to heat a room and also water or radiators, then a boiler stove , could be your solution. If you wish to heat all of your home and domestic hot water, then a boiler is the choice for you.**What fuels you may wish to use?**If you have access to chopped wood, then a wood burning stove may be an option for you**Where do you intend to put it?**If you want to put it in a room such as a kitchen or living room then a stove or boiler stove would be the best option. You must consider the following.

- Location in the room – is it on an outside wall for a flue or is there a chimney in the room when choosing a stove or boiler.
- If it is a boiler, then pipes will have to be plumbed to the location of the stove/boiler.

## How to work out what size stove you need:

Why is this important when choosing a stove or boiler

It is imperative that the output of the stove matches the area you are trying to heat.There is no point having a stove with a very large output in a small room, as the stove will not run efficiently and be too warm. Equally there is no point having a stove with a small output in a large room as it would not heat that room sufficiently. A general estimate of the output needed to heat the room can be made using the measurements of the room along with other factors as well.

There are two ways of doing the calculations.

- One is in feet, which calculates the minimum amount of British Thermal units (BTU’S) needed to heat your room.
- The other is in meters, which calculates the minimum amount of kilowatts (kw) needed to heat your room.

### Calculation in Feet:

- You need to take three measurements, the length, the width, the height (
**L, W,H)** - Multiply each of these measurements, the length x the width x height. You now have the cubic capacity of the room.
- You then multiply by a factor of either 5, 6,7 based on the following criteria.

- If your room has an average amount of windows and doors and has a n average amount of insulation you multiply your cubic capacity by 5
- If your room has a higher than average amount of windows and doors and has lower than average amount of insulation you multiply your cubic capacity by 6
- If your room is north facing, or has little or no insulation , or has a very high amount of windows and doors you multiply your cubic capacity by 7.

You now have the number of BTU’S required to heat your room. You can convert this total to kw’s by dividing it by 3411.80

Example

Room dimensions – Length 17 feet, width 15 feet, and ceiling height 8 feet

17 x15 x8 = 2,040 cubic feet

For average insulation and number of windows, 2,040 x 5 = 10,200 BTU’S

To convert to Kw. 10,200 /3411.80= 2.99 or 3 Kw.stove

__This is a 3 kw fiachra stove

**Calculation in meters:**

- You need to take Three measurements (
**L,W, H)** - Multiply each of these measurements(
**L x Wx H)**and now you have the cubic capacity of the room - As a guide 1 Kw heating output will heat either 10,14, or 25 cubic meters of space depending on windows , doors and insulation. So you divide the cubic capacity by a factor of either 10,14 or 24 based on the following criteria

- If your room has an average amount of windows and doors and has average insulation then divide the cubic capacity by a factor of 14 (LxWxH) / 14
- If your room has a higher amount of windows and doors and has a low amount of insulation, then divide the cubic capacity by a factor of 10
- If your room is north facing, or has little or no insulation, or has a high amount of windows and doors, then divide the volume by a factor of 25

You now have worked out the minimum amount of Kw’s needed to heat your room.

Example:

Room dimensions – length 5 mtrs, width 4 mtrs and ceiling height 2.3 mtrs

5 x 4 x 2.3 = 46 cubic meters

For average insulation and number of windows , 46/14 =3.28 Kw Stove

A Boru 4 kw stove if you are choosing