Zero energy Homes, Schools and other buildings
Soon all new buildings will be energy zero.
California, the European Union, Japan and several Chinese jurisdictions have ambitious Zero Energy Building projects for the next decade.
Zero Energy Buildings are within our reach. They aren’t a distant or an expensive green dream.
Houses and Other Buildings energy Consumption
Buildings waste a prodigious amount of energy.
America’s buildings consume more than 70% of the electricity and around 35% of the natural gas used in the country. They are the largest single contributor to CO2 and other harmful gas emissions.
The average American household spends more than $2.000 per year in electricity and gas - more than $100.000 over 50 years.
But it doesn't have to be this way. If you are building or buying a new home, you can reduce energy bills to a small fraction.
Low and zero energy buildings do not mean privation or less comfort. On the contrary.
An Easy way to make Energy Savings in your House: efficient appliances
Domestic appliances and electronics consume about 40-50% of the average household electricity consumption. A lot, indeed!
But new efficient refrigerators and freezers can cut refrigeration costs by as much as 50% or more. And the same is true for clothes dryers, dishwashers or clothes washers…
Super-Insulation and Air-Tightness
Smart home design and very high levels of insulation and air sealing are key to reduce residential energy consumption and improve thermal comfort.
Buildings energy consumption in the US:
about 80% of the electricity and 35% of the Gas
Many dozens of infographics here
In new construction and large scale renovations consider:
- smart house design and proper, orientation, size, shape and layout;
- high levels of insulation and airtightness;,
- high-efficient windows and exterior doors,
- energy efficient appliances and electronics,
- energy-efficient lighting,
"Small" home energy improvements:
- metallic window films;
- small sealing and insulation projects;
- zoning and thermostats
- energy efficient appliances and electronics
- switch off or unplug electronics and appliances as much as possible;
- new energy efficient lights,
- low-flow rate faucets and shower head,
- strategies involving ceiling fans and the settings of air conditioners.
most fundamental principle of home energy efficiency
We don’t need super-smart houses or technological breakthroughs to dramatically reduce our energy consumption and to minimize energy waste.
The Golden Rule For House Energy Improvements
30 Misconceptions about House Energy Improvements
20 Commandments for Home Energy Improvements
Design, Architecture & House Construction
Working and finding construction professionals
First Priorities When Building a New House or Making a Big Renovation
House-Energy savings estimation tool
Want to know how much energy you can save by using new energy efficient appliances, new lighting bulbs, new windows and exterior doors, higher levels of insulation, metallic window films, ceiling fans and more... much more?
New Houses, Schools and other buildings have to be more energy efficient
Building codes have failed – and are still failing – to provide guidance for very energy efficient homes and Zero Energy Houses.
Energy auditors often complain about homeowners: “We go back to the same houses, and make the same recommendations that are never implemented”.
House Energy book: 101 Ideas to Improve your New Home
New Houses Guide
Tell your Mayor that you Support Green Building
Rating your City Green Building Programs
Cities with Great Green Building Programs
House design: do not compromise
If building a new house, consider carefully its siting and shape, and its orientation to the sun. .
Wrong decisions will make your home less comfortable and less energy-efficient.
Also consider carefully the size of the house. Homes should be modest in size to be energy-efficient; large buildings are difficult to heat and to cool. If possible, keep the size of your home around 2,000 square feet or less.
hot climates & Cooling
If you live in a hot climate shade your window and walls as much as possible (and the ground around your house). Use trees and shrubs and also devices like awnings, shades and pergolas.
Shade and natural ventilation are key elements for energy savings. Consider breezes and outside fresh air to cool your house. Open your windows to breezes and use ventilation fans and whole-house fans to bring outside fresh air into your home.
Saving energy with Ceiling Fans and Air Conditioners. They Can Work in Conjunction
Ceiling fans and air conditioners cool by distinctly different methods. But they can work in conjunction.
Each one degree increase (Fº) in the thermostat setting can decrease your air conditioner bills by, say, 5%. And ceiling fans make that possible.
See: Ceiling Fans with AC
You May Not Need (Central) Air Conditioners
Central air conditioners are expensive to install and to run.
You can greatly reduce your cooling bills by using very energy efficient windows, shading devices (overhangs, porches; awnings, blinds, shades, shutters), tree-shade and high levels of attic and roof insulation...
energy savings: Pay attention to electronic devices in Standby and Idle Mode.
Top energy wasters in our homes may be hidden or go unnoticed. Many home appliances have surprisingly high energy costs. Be aware.
Pay attention to refrigerators, clothes washers and other domestic appliances. But do not forget vacuum cleaners, personal computers, printers, routers and mobile telephone chargers and telephone answering machines; or CD players, video game consoles, grills, electric ice-cream makers, electric bread makers, electric juice extractors, electric knifes, electric egg boilers, electric toasters, coffee machines, hair-dryers, electric toothbrushes, electric razors, electrically powered towel rails, electric blankets, electric and more, much more…
That’s just a part of a much larger list.
See: House Electronics
Infographics and Videos
Saving energy in our homes with Heat Pumps: Electric Heating and Cooling
Heat pumps provide both heating and cooling at lower prices that other electric equipment.
They are a reliable technology, excellent for moderate climates. But which is their role in efficient homes, in cold climates?
See: Heat Pumps Guide
House Heating Savings & Furnaces Systems
A small furnace, properly installed and with a short and straight duct system, can provide significant energy savings.
That's a good choice for cold climates, in large buildings with conventional levels of insulation and airtightness. But furnaces aren't the ideal heating system for zero energy houses..
See: Furnaces Guide
Fireplaces Are Unhealthy and 90% of the Heat Goes Up Through the Chimney
There are dozens of millions of homes with fireplaces worldwide. Unfortunately they heat too little and they emit dangerous pollutants.
As the American Lung Association puts it: "Burning wood emits harmful toxins and fine particles in the air that can worsen breathing problems and lead to heart and lung disease and even early death"
high efficient Windows & Tubular Skylights
Windows are a weak link in the thermal envelope of any house. They are responsible for many thousands of dollars in energy costs, during their lifetime, in average homes.
As to skylights, they can be great for natural lighting, but they can also increase your energy bills by hundreds of dollars, every year. Don't be fooled by dreams of beautiful views at the top of your rooms.
Lighting Savings of About 75%
Lighting accounts for about 5%-10% of residential energy bills. In the USA that amounts to $100-$200 per year/household...
But it's not difficult to reduce lighting consumption. New efficient light bulbs and fixtures combined with simple strategies, can easily cut home lighting bills in half or more.
Buying a New Energy Efficient House
Energy Star certified houses (EUA, Canada), 6-10 Star homes (Australia) and European homes with a A or B energy performance certification can provide significant energy savings. But they fall short of the best.
energy savings: Electric vs. Gas Small Heaters
Solar energy for our Buildings
Solar water heating is now part of millions of homes worldwide. On the other hand, much of the future of our planet relies largely on photovoltaic systems...
Selecting a Water Heating System
Water heating bills amount to $300 to $450 per year in most households. Water heating is one of our biggest energy expenses.
There are several types of water heaters to choose from: 1) Solar… 2) Gas tankless (condensing and regular); 3) Gas storage (condensing and regular); 4) Electric; 5) Integrated heating-water systems.
See: Water Heating Guide
Energy-Efficient Exterior Doors
Consider energy efficient exterior doors.
Be careful with metal and patio glass doors. They are affordable and may look nice, but that comes at a high cost. They are a major source of heat loss and gain.
See: Doors Guide
Be Aware of Leaky and Un-Insulated Ducts
That hidden and unnoticed network of tubes in the walls, ceilings or floors, carrying the air from your home’s furnace or heat pump or AC to the several rooms, can be a big energy waster.
Leaky and un-insulated ducts can add hundreds of dollars to energy bills.
See: Home Ducts Guide
Home Moisture Problems
Keep excess moisture out of your home. Moisture is a leading cause of damage in homes, and also of higher energy bills and serious health hazards.
See: Home Moisture Guide
Roofs and Attics
The key job of a roof is to keep water out. Roofs can’t ever be a significant source of useful heat gains.
Walls guide for energy savings
Walls need insulation. Without it, heat will flow to the outside through the materials they are made from. Wood, steel, concrete and other construction materials do not impede heat flow.
Floors & Flooring
When building or renovating a home, when it comes to floors, people generally think of floor coverings or radiant floor heating…
Mmost homeowners and builders do not recognize the importance of floors for house energy savings and they end up with buildings that are expensive to heat and cool.
House design and Efficiency & Basements
If you are going to build a new home, unless you are building on a small lot or confronted with height restrictions, and unless you do need below-grade space, a slab-on-grade foundation is a better choice than basements (or crawlspaces).
See: Basements Guide
Do Not Forget your Yard and your Pool
A single gas-powered leaf blower can emit as much pollution in one hour as dozens of cars operating for the same period of time. And typical gas mowers are responsible for about 5% of the world’s pollution, which is awesome.
Pay attention to your yard equipment efficiency, and also to your pool, if you have one.
energy improvements Are a Powerful Tool For Creating a Better Environment
Residential energy efficiency is a powerful means for creating a better environment and a better world.
Energy Improvements & Environment
The 2 sides of: CO2 and Home Energy Consumption
Passive Solar Guide
Residential Solar Photovoltaic
Solar Water Heaters Guide
Room Space Heating with Solar
Small Wind Systems Guide
Small Hydro Systems Guide
Green Electricity Guide
The landscape around your house is not just about privacy and good looks; it has also a great impact on your comfort and energy consumption.
Save Money... Find the best ways for Home Energy Efficiency with us…