What Size Gas Line Do I Need For 400 000 Btu Pool Heater

Typical machine supply 5 7. What i am trying to find out is if 3 4 gas line is sufficient to run four furnaces that could use a max of 216 000 btu s if all were running at once. Heating up a pool versus a pool and spa combination requires less btu power.

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The gas line must be sized 1 3 larger to compensate for elevation.

What size gas line do i need for 400 000 btu pool heater. One cubic foot of lp gas 1000 btu nominal pressure at the burner for natural gas is 3 5 of water column. For most pool owners you will only go from 50 to 80 or cold to warm perhaps once per year. Surface area x temperature difference x 12 where surface area is the area of the pool in square feet temperature difference is the result of desired pool temperature current pool temperature and 12 is our constant number based on the assumption that wind speed is around 3 5 miles per hour. A 400k btu heater will roughly heat your pool twice as fast as a 200k btu heater but it also burns gas twice as fast.

I have two 4 ton units and two 5 ton units. Heater size in btu hr. Most gas bills measure gas in therms or decatherms. We ve answered this question for hundreds of warm water lovers and would love to speak to you about your gas pool heater size.

A therm is 100 000 btus of heat. Therm and decatherm before we get into the actual calculations used to compute the correct gas line size a word or two is in order concerning the measurement of natural gas. If you are still unsure about whether you could or should increase your pool or spa heater size give our pool heater installation experts here a call. Usually if you have a pool and spa combination we recommend purchasing the largest btu size available because you re not just heating up a single.

When shopping for heaters many people make the mistake of choosing the wrong size for their actual needs. Given all the different options available for heaters space vented gas console and more narrowing down the choices can be a great way to ensure that you are choosing the best option. Call us at 1 800 288 7946. A machine with a burner that requires 440 000 btu would need a 1 pipe for a 20 long run.

Natural gas ng flow is given in thousands of btu hr. This is essentially the heater sizing equation that people use to determine the size of pool heater you need but in actuality it is only one of the ways in which you can approach this question about what size of pool heater you need.