You can get a basic estimate **using the square footage of your house**. The general rule of thumb is that you need between 30 and 60 BTU per square foot. Depending on your climate zone, you can determine how many BTU per square foot you need.

## How do I determine what size furnace I need?

**How to Calculate the Right Size Furnace**

- Calculate the square footage of your home. …
- Find out What Climate Zone Your Home Is In Climate is another factor that helps determine how many BTUs you need to heat your home. …
- Multiply your square footage by 40, the lower number recommended for the climate zone.

## How many square feet will a 80000 BTU furnace heat?

80 X 1,000 square feet

**80 X 1,000 square feet** = 80,000 BTUs.

## How many sq ft will a 60000 BTU furnace heat?

A 60,000 BTU gas furnace will effectively heat a space of **up to 1,800 square feet**. This makes a 60k BTU furnace ideal for most homes, smaller offices, small businesses, and storefronts. In a moderate to warm climate, you need between 25 and 30 BTU of heat to warm up a square foot.

## How big of a furnace do I need for 1600 sq ft?

Table of Furnace Sizing by Square Footage

Home Size | Hot Climate | Moderate Climate |
---|---|---|

1,600 sq ft | 54,000 BTU |
67,000 BTU |

1,800 sq ft | 61,000 BTU | 75,000 BTU |

2,000 sq ft | 68,000 BTU | 83,000 BTU |

2,200 sq ft | 75,000 BTU | 92,000 BTU |

## Is it better to undersize or oversize a furnace?

**It’s better to be a little undersized than oversized**, You’ll get a little longer run time, but it’s better than shortcycling.

## Can a furnace be too big for a house?

**Having a furnace that’s too big for your space is extremely inefficient**. There are two simple signs that indicate that your furnace is most likely oversized: Your furnace runs for a short period of time before shutting off. Your home has uncomfortable hot and cold rooms.

## What is the correct size furnace for a 1500 square foot house?

A 1,500-square-foot home will require between **45,000 to 90,000 BTUs**. A 1,800-square-foot home will require between 55,000 to 110,000 BTUs. A 2,100-square-foot home will require between 65,000 to 125,000 BTUs.

## How much is a new furnace for a 1500 square foot home?

between $2,990 and $4,360

The average cost to replace a gas furnace in a 1500-square-foot house is **between $2,990 and $4,360**. For a standard-efficiency gas furnace, a 60,000-80,000 BTU model is the best choice.

## What size furnace do I need for 1700 sq ft house?

Chart For Furnace Tonnages And BTUs For 500 – 3,000 Sq Ft Houses

House Size (Sq Ft): | Furnace Size (in BTUs): |
---|---|

1500 sq ft home | 67,500 BTU furnace |

1600 sq ft home | 72,000 BTU furnace |

1700 sq ft home | 76,500 BTU furnace |

1800 sq ft home | 81,000 BTU furnace |

## How many square feet will 18000 BTU heat?

1,000 square foot

Calculating the number of BTUs needed to heat an area

For example, a 300 square foot room typically requires 7,000 BTUs to maintain a comfortable temperature, while a **1,000 square foot** room requires 18,000 BTUs.

## Do you count the basement when sizing a furnace?

When including a finished basement, **use 1/2 of the finished basement square footage with the rest of the area being calculated**. mobile homes. In determining a furnace that is right for your needs you will need to determine the direction in which the heated air flows or is discharged from the furnace.

## How big of a furnace do I need for 2000 square foot home?

Rough Estimates

A mid-sized home of 2,000 square feet would need approximately **50,000 to 60,000 Btu** to heat it properly. With a less efficient furnace operating at 80 percent efficiency this would require a 60,000- to 72,000-Btu furnace.

## How much is a new furnace for a 2000 square foot home?

The average cost range for purchasing and installing a gas furnace designed to heat a 2,000-square-foot home with a 97% efficiency rating ranges from **$4,000 to $8,000**, with most homeowners spending around $6,000 total on a high-efficiency gas furnace replacement in a 2,000 sq. ft.

## How much is a new furnace for a 3000 square foot home?

Furnace for a 3,000 Square Foot House

home is **$1,200 to $5,600**. These prices assume you are using an electric unit in zone 2 or another type in zone 4. If your home is in another climate, this may change your unit’s size and price. Most homes of this size need furnaces roughly 150,000 BTUs in size.

## How many square feet will a 75000 BTU furnace heat?

A 75,000 BTU heater can heat a room of **between 1,900 and 3,700 square feet** in a cold climate if there is little to no insulation. In more temperate climates the heater fares better, heating an uninsulated room of any size from 2,400 to 4,600 square feet.

## What size furnace do I need for 1400 sq ft house?

STEP 1: Determine how many BTUs of heating and tons of AC you need

House Square Footage | BTUs Needed |
---|---|

1,000 – 1,200 | 21,000 |

1,200 – 1,400 | 23,000 |

1,400 – 1,500 |
24,000 |

1,500 – 2,000 | 30,000 |

## Is a higher BTU furnace better?

Heating and Cooling Capacity

The heating power of a furnace is measured in units called ‘BTUs’. Essentially, **the higher the BTU rating, the more powerful the furnace will be**.