Heat loss calculations using actual gas use – accuracy?

I’ve calculated our home’s heat loss using the method outlined by Dana Dorsett here: https://www.greenbuildingadvisor.com/article/replacing-a-furnace-or-boilerI realised after the fact that not all of our gas readings are actual, some are estimated… I’ve calculated our home’s heat loss using the method outlined by Dana Dorsett here: https://www.greenbuildingadvisor.com/article/replacing-a-furnace-or-boilerI realised after the fact that not all of our gas readings are actual, some are estimated…Read MoreGreenBuildingAdvisor