A rough standard measurement that you can use is 200 to 250 watts per foot. For example, to calculate the baseboard length for a 300-square-foot room that requires 3,000 watts, you would divide the required watts by 200 and 250 (the range of watts required per foot).

**Measure** the length and width of the room, in feet. Multiply the length x the width to get the square footage. Multiply the square footage x 10, to give you the rough wattage of **heating required** for the room. Choose one or more **baseboard heaters** that total or exceed the **required** wattage **calculation**.

Furthermore, how many feet of hydronic baseboard heat do I need? The watts required per square meter are for an average room, if your room is a bathroom then you **need to** use a minimum of a 1000W **heater**. If your ceiling is over 8 **feet** then the wattage **needs to** be increased by 1/4 for every 2 **feet** over this height.

Moreover, how do I calculate BTU for baseboard heat?

**How to Size Hot Water Baseboard Heaters**

- Measure the height of the room, the width of the room and the length of the room.
- Multiply the cubic footage of a room by 25 BTUs to determine the rough estimate of BTU requirements for the room.
- Add 25 BTU per cubic foot if your home has moderate to fair insulation.

What is a hydronic baseboard heater?

A convection (or “hot air”) **baseboard heater** heats a room by drawing in cooler air and pushing out warmer air. A **hydronic** (or “hot water”) **baseboard heater**, on the other hand, warms a room by **heating** a non-toxic fluid from within a reservoir.

### How many baseboard heaters can I put on a 30 amp circuit?

Adding a Baseboard Heater Circuit Depending on the total wattage of the heater(s) you’re adding, you may need a 20-amp or 30-amp circuit. A 20-amp circuit can safely power 3,800 watts of heating demand, while a 30-amp circuit is suitable for up to 5,700 watts.

### How many BTU do I need per square foot?

To determine the number of BTUs per square foot that you need to heat a room, simply multiply the square footage by 20 BTUs per square foot. For example, if a room has 1,000 square feet, you would require 20,000 BTUs to heat it.

### How much more efficient are hydronic baseboard heaters?

More expensive to purchase: Hydronic heaters will cost about four times more than the corresponding convection baseboard heater. While the initial outlay is more than with convection heaters, they pay for themselves many times over in terms of energy savings.

### How much do baseboard heaters cost to run?

In most climates, an average 1,200 square-foot, well-insulated home using an electric baseboard requires about 12,000 watts of power. For a home like this, monthly electricity costs for running the baseboard alone will be approximately $400.

### Are modern baseboard heaters more efficient?

All electric heaters are 100% efficient at converting electricity to heat, regardless of how old they are, so replacing old baseboards with newer ones won’t save you any energy. There is nothing else for the electricity going through your baseboards to do but turn into heat.

### Is hot water baseboard heating expensive?

Hot water baseboard heaters (also called hydronic baseboard heaters) use central heating, but channel hot water through pipes to individual baseboard heating units to heat rooms. These heaters are an efficient heat source. In fact, they tend to be more efficient than other central heating systems.

### How many linear feet of baseboard do I need?

Divide the total number of inches by 12 to convert from inches to linear feet. For example, if your wall measured 40 inches in length, and you are installing molding on the top and bottom, 40 x 2 = 80 inches. Divide 80 by 12 to get 6.66 linear feet.

### What size baseboard should I use?

Most baseboards are 1/2 to 1 inch thick and 3 to 8 inches tall. Gauge baseboard size by its relationship to crown and casing. Baseboard is typically taller than casing is wide, and about as tall as the crown. The taller the crown, the taller the baseboard should be to maintain visual balance.

### How do I calculate how much heat I need for my room?

Please enter the dimensions of your room (metres), including the area of all windows (metres2) if applicable. Squared area = times the total height by the total width. Enter “0” if there are no windows in this room.

### How do I calculate BTU for radiant heat?

In Floor Radiant Heat System will give you the most output Btu, but also the slowest response time. When figuring the over all length of tubing you will need you divide any 6 Inch spacing area by . 5, divide any 9 Inch spacing area by . 75 and any 12″ spacing area by 1.

### How tall is a baseboard heater?

Baseboard Heater Height No matter what height you install a heater, you must follow the manufacturer’s clearance requirements. Most baseboard heaters need at least 12 inches between the heater unit and any combustible material, such as drapes or furniture.

### How hot do water baseboard heaters get?

As you can see, when the average water temperature of a 4 gpm flow through the baseboard is 180 degrees F, each linear foot of baseboard will put out 610 Btu/hr. However, if you lower the average water temperature to 140 degrees F, each linear foot of baseboard will only put out 340 Btu/hr.