Green homes Why not try making our existing homes greener? The first energy related codes of 1977 required R-11 2/4 walls, R-19 ceilings and either insulating the foundations or the cellar ceilings R-11. Also required was either storm windows or double-glazing. As research continued so did the insulation requirements and windows and heating system improved efficiencies. Next codes required R-30 ceilings attic. 2/4 walls now can be insulated up to R-15 and more attention is given to cellar floor heat loss R-19 1998 code was developed to address an envelope design Windows have to be tested and labeled to meet a U/R value in the 30’s High efficiency gas burners can reach 97% efficiencies. Even oil burners have to be at least 80 % many now approach mid 80”s % A vast improvement over the 68-72% of the 70’s. Another part of the energy code addressed hot water pipe and duct insulation. It has been found that 25-35% of energy/ heat/Ac is lost in transmission I will post the ResCheck formula to plug in your variables, where one can see the difference of adding insulation or replacing windows Things all can do to save energy, And if done this, year save you receipts for tax credits. R19 ceilings to R30 or 38 add R13 or R19 insulation. This may be you best bang for your $$$ Most of are stuck with our current side walls situations, but if re siding it makes sense to add an insulation backer to improve your situation Replacement of upgrading to new windows: Storm windows are better than single glazed glass, but are no where as efficient with today’s low E glass This is not cheap but can be done is phases Add to cellar ceiling insulation if your cellar is unconditioned space. While at it, your sill and contact with the foundation is notorious for leakage stuff insulation there caulk or polystryfoam ( sp) caulk the perimeter. Insulate your exposed ducts and hot water pipes Today it is suggested R-5.0 which is 3/4 to 1” on your piping, 1.5” fiberglass Duct wrap. BTW Insulation also reduces noise of transmission. Again before insulating ductwork, seal all leaking seams and elbows. The best product is latex duck seal/ cement. At this point you have addressed most of the major DIY projects. But there is other areas to look at All exterior wall electrical outlets can be insulated using behind the cover seals. Changing out light bulbs to energy efficient bulbs will also save you money and conserve energy. These initial steps to be expanded further. When is the best time to do them NOW. I expect there will be insulation shortages in the Fall. With shortages,. will come price increases?