England's Stove Works SSP01

Yes

 

Here is some literature I found. May not have anything to heat setting.

B. Calculating Total Energy Input
1. Higher Heating Value vs. Lower Heating Value
A critical value used in applying the thermal efficiency standard is the “total energy input” for the year for which thermal efficiency is being calculated. One of the first steps in determining the total energy input for a unit is identifying the unit’s fuel mix and the heat content or heating value of the fuel or fuels combusted by the unit. Heating value, commonly expressed in Btu, can be measured in several ways, but the most common are to use gross heat content (referred to as “higher heating value” or “HHV”) or to use net heat content (referred to as “lower heating value” or “LHV”). According to the Energy Information Administration (EIA) of U.S. Department of Energy, higher heating value includes, while low heating value excludes, “the energy used to vaporize water (contained in the original energy form or created during the combustion process).”2
As discussed above, EPA adopted in the existing rules the same thermal efficiency standard as that adopted by FERC in determining whether a unit is a qualifying cogeneration unit, except that EPA applied the thermal efficiency standard to all fuels and the FERC limited application of the standard to natural gas and oil. FERC’s regulations that included the thermal efficiency standard stated that “energy input” in the form of natural gas and oil “is to be measured by the lower heating value of the natural gas or oil.” See 18 CFR 292.202(m). As explained by FERC when it adopted these regulations in 1980 (45

 

But my main point being it falls right in line with some other high quality stoves.

 

I would too. Although I do not know if they would actually have more surface area. There is more to it than exchanger shape.

 

My Vernon AE 71.2
E2= 75.5

 

And theres the quads. where's the stupid Enviro's???

 

I was hoping to get a reaction from you.

 

Who you calling Stupid??

 

I would guess the Enviro Maxx will be one of the top efficiency stoves.

 

To could not find any information on any Enviro units. But the size of that unit gives it an advantage I would think.

 

Not sure size has anything to do with it, since the results are a %......just sayin.

 

That's what I've been saying for years

 

By nature a larger stove will have more surface area on the heat exchanger and a longer air path which to extract heat. This is what in am basing my guess on.