You are blurring fuel oil type nozzles with ones for waste oil that we use that are totally different. I can and do with every single unit with a J-pump dial in the flame perfectly without changing nozzles. There is no need for combustion analyzers or smoke testers that were designed for fuel...
You are saying contradicting things here. The nozzle is not changing the fuel delivery rate. We run 9-5 nozzles for 140k-350k heaters running any type of fuel and 9-11 for 500k. In 34 years I have never change a nozzle based on fuel for any of my customers. I will show them how to properly...
Changing the nozzle will do nothing but changed the shape of the flame. If you have a J-pump with regulator then you need to adjust oil pressure accordingly. If you have a metered pump then no adjustments needed.
Air diaphragm pumps are great at moving cold oil but require a high volume of air. I have a couple of customers that purchased a Redline pump that they like except for the price of them.
https://redlinepumps.com/extremedutymp4000rsg1.html
The 55 gallon rule has been around for a long time. A few years back though the shipping industry and the recyclers tried to get a new law in place. They wanted a law that said that even if you had a waste oil heater all oil had to be picked up by the recycler, filtered, then returned for a...
Technically you are only suppose to haul 55 gallons of your own oil. Here in Montana all you have to do to become a licensed hauler is fill out form and send in check for like $200. Some of the big recyclers are causing problems and putting the fear into shops that only they can take the oil.
Every shop in the past 31 years where I have a boiler we are using approximately 1/3 of the BTU as compared to forced air. It takes less BTU to heat objects with radiant than using a forced air heater to scorch the air. It does cost more to install but in the long run it will pay off.
I do not like to quote prices for other distributors territory. Waste oil boilers are not cheap. As for efficiency they about the same as fuel oil until ash starts to build up.
Some of you are making it sound complicated. All the bad stuff we do not want like water, sludge, antifreeze, etc all settles to the bottom of the tank. Let it settle in totes or preferably bulk storage tank then staying off the bottom of tank pump into your burn tank. I have a customer that...