gas heat efficiancy calculator program

canine

I was asked by a customer if a comparison of savings could be calculated on projected savings between standard atmosh. and high eff. direct vent boilers. I have seen a program to calculate this and do not remember where. This is an apartment building with fix loads and demands so the adjustable variables from the tenants is at a minimum.

nicholas bonham-carter

cost comparison

http://www.bchydro.com/powersmart/technology_tips/buying_guides/hvac/small_gas_boilers.html