In the HVAC industry, MBH is a shorthand unit used to express large quantities of heat energy. The “M” comes from the Roman numeral for 1,000, and “BH” stands for BTU per Hour. So, 1 MBH = 1,000 BTU/hr.
When you look at a commercial boiler or a large rooftop unit (RTU), the capacity is almost always listed in MBH rather than thousands of individual BTUs. This keeps data plates readable. For example, a unit labeled “120 MBH” is much easier to read than “120,000 BTU/hr.” Understanding this unit is critical when sizing equipment for large buildings or comparing heating outputs between different manufacturers.
To quickly translate your equipment’s label into real-world cooling or heating power, use the MBH Capacity Auditor below.
What does MBH stand for in HVAC
In HVAC, MBH is used to represent a thousand BTU per hour. And BTU means British Thermal unit formula which helps to measure the capacity of an ac unit to produce cooling or heating effect. HVAC technicians use MBH to determine the total amount of money you are expected to expand on running your AC unit. And the M in the acronym is 1000 written in Roman numeral.
Can I convert MBH to BTU
Yes, MBH can be converted to BTU. Remember in high school when you are first introduced to units of measurement and asked to convert them from one until to the other? Well, MBH can also be converted to BTU using similar tricks. You will be informed about how best to concert MBH to BTU in the subsequent section, so keep reading.
How many BTU in MBH
MBH is an equivalent of a thousand BTU and can be mathematically represented as MBH = 1000BTU.
How do you convert MBH to BTU
I know this is the moment you have been waiting for, so I would just go straight to business. In this aspect, I will make use of tables because it is one of the best tools for mathematical presentation.
| MBH | BTU per hour |
|---|---|
| 100 MBH | 100000 BTU/h |
| 200 MBH | 200000 BTU/h |
| 300 MBH | 300000 BTU/h |
| 400 MBH | 400000 BTU/h |
| 500 MBH | 500000 BTU/h |
Since 1 MBH = 1000 BTU, that means the figure which serves as the value of MBH will be multiplied by 1000 just as it is carefully illustrated in the above table.
For example;
In the above table, 100 MBH is multiplied by 1000, which gives us 100000 BTU/h. The same method is used to calculate the corresponding answers to each MBH value.
Can I convert MBH to tons
Yes, MBH can also be converted to tons. However, it would be rational to let you know that Tons is a unit of measurement used in refrigeration.
How many MBH per ton of cooling
1 MBH is equivalent to 0.8333333333333421 tons. And 1 ton is the equivalent of 12 MBH, which means 1 ton is 12 times greater than 1 MBH.
💡 Pro Diagnostic Tip: Knowing that 12 MBH equals 1 Ton of cooling is the fastest way to verify if a unit is sized correctly for a room. If you are calculating the requirements for a high-load area, you’ll also need to factor in CFM (Cubic Feet per Minute) to ensure the air volume can actually deliver that MBH capacity.
How to convert MBH to tons
To convert MBH to tons, you multiply the value of MBH given by 0.0833333333.
For Example;
Assuming the value given for MBH is 50 and you are asked to convert to tons, you calculate by multiplying 50 by 0.0833333333. Your calculation should look this;
50 MBH to tons
50MBH = 50 × 0.0833333333 = 4.166666665
Refer to the table below for more details about MBH to tons conversion.
| MBH | Tons |
|---|---|
| 100 MBH | 8.33333333 ton |
| 200 MBH | 16.66666666 ton |
| 300 MBH | 24.99999999 ton |
| 400 MBH | 33.33333332 ton |
| 500 MBH | 41.66666665 ton |
Can I convert MBH to MMBTU
Yes, MBH can also be converted to MMBTU. However, MMBTU should not be confused with MBH because they both have almost similar representations in HVAC. While MBH stands for thousands of BTUs, HVAC technicians MMBTU represents a million BTUs. So the question now is how many MBH is there in 1 MMBTU?
MBH to MMBTU calculated
TO convert MBH to MMBTU, we must first of finding the equivalent of 1 MBH to 1 MMBTU. 1 MBH = 0.000999999521376461 which means 1 MMBTU per hour is 1001 times greater than MBH.
How to convert MBH to MMBTU
To convert MBH to MMBTU, all you have to do is multiply the value of MBH by 0.000999999521376461.
For example;
If the value given for MBH is 50, you calculate it thus;
50 MBH = 50 × 0.000999999521376461 = 0.0499999761
The table below shows the conversion of MBH of different values to MMBTU
| MBH | MMBTU (per hour) |
|---|---|
| 50 MBH | 0.0499999761 BTU/h |
| 100 MBH | 0.0999999521 BTU/h |
| 150 MBH | 0.1499999282 BTU/h |
| 200 MBH | 0.1999999043 BTU/h |
| 250 MBH | 0.2499998803 BTU/h |
| 300 MBH | 0.2999998564 BTU/h |
| 350 MBH | 0.3499998325 BTU/h |
| 400 MBH | 0.3999998086 BTU/h |
💡 Pro Diagnostic Tip: In larger commercial buildings, MBH ratings are used to determine the necessary output for RTU (Rooftop Units). While residential units might only be 24-60 MBH, commercial RTUs can exceed 250 MBH, requiring specialized service tools like a 4-port Manifold Set for efficient refrigerant management.
Can I convert MBH to CFH
Yes, MBH can be converted to CFH. The amount of energy present in natural gas is equivalent to the volume, therefore, MBH can be easily converted to cubic feet per minute, seconds, or an hour.
What does CFH stand for in gas
CFH in gas stands for cubic feet per hour and it is used to calculate the flow rate or speed of case through a pipeline. But in HVAC, CFH is used to determine the volume of flow of air or gas through the cooling or heating system over a certain period. The flow of air or gas can also be calculated per minute or second.
How do you convert MBH to CFH
To convert MBH TO CFH, you need to compare a unit of MBH to a unit of CFH. Since natural gas is measured in therm and a therm is equivalent to 100000 BTU, which means to get your MBH in CFH, you will have to get the value of MBH in BTU before you proceed with your conversion. For example;
If the value of BTU given is 500,000 BTU per hour, the first step for you to take is converting the BTU to MBH. To do this what you have to do is divide the value of the BTU given by 1000 since 1000 MBH is equivalent to 1 BTU.
Therefore;
1MBH= 500000 BTU = 500 MBH
1000 BTU
To convert MBH to CFH, divide MBH by 100000 which is the equivalent of gas in BTU.
This, we will have
500 = 0.005 therm/h
100000
Then multiply your answer by 96.7 which is the value of therm in natural gas.
Therefore MBH in CFH will be;
0.005 × 96.7 = 0.4835 ft cube per hour.
Can I convert MBH to KW
Yes, MBH can be converted to KW. KW means kilowatt and it is the combination of two words with distinct meanings. Considering the two words separately, Kilo means 1000 and watt is a unit measure of power. This means the meaning of the two words combined is 1000power.
How many MBH is in kW
1 MBH is equivalent to 0.029307107kW. And can be mathematically represented as;
1 MBH = 0.029307107kW
How to convert MBH to kW
Conversion of MBH to kW is less complex. All you have to do is multiply the value of MBH given by the equivalent of 1 MBH in kW which is 0.029307107
For example;
If you are given 60 as the value of MBH, what is expected of you is multiplying 60 by 0.029307107. This can be mathematically represented as thus;
60 MBH = 60 × 0.029307107 = 1.75842642
For more conversion from MBH to kW, with different values, check the table below.
| MBH | Kilowatt (kW) |
|---|---|
| 50 MBH | 1.46535535 |
| 100 MBH | 2.9307107 |
| 150 MBH | 4.39606605 |
| 200 MBH | 5.8614214 |
| 250 MBH | 7.32677675 |
| 300 MBH | 8.7921321 |
| 350 MBH | 10.25748745 |
| 400 MBH | 11.7228428 |
CAN I CONVERT CFM TO MBH
Yes, CFM can be converted to MBH. CFM is the short form of Cubic feet per minute. And it uses to calculate the rate of flow of gas through a cooling or heating system over time.
How many CFM per BTU of heating
100 CFM is equivalent to 10000 BTU which means your cooling or heating system of 100000 BTU will require 1000 CFM.
How to convert CFM to MBH
Earlier in this article, I have carefully illustrated how MBH can be converted to CFH. Using the same value in the previous section, if we are to convert MBH to CFM, our calculation will be like this;
Since 60 minutes equals 1 hour, therefore, we are going to divide our answer by 60 and that will give us the value of MBH to CFM.
That is;
0.4835 = 0.0080583333 ft cube/min
60
However, since we are to convert from CFM to MBH, the case will be reversed and we are going to multiply the initial value by 60. Hence our calculation should look like this;
0.4835 × 60 = 29.01