back saw
backdrafting
backup heating
balance of system (BOS)
ball peen hammer
ballast
bamboo flooring
band gap
band saw
bargeboard
basement
basement insulation
batch solar collector
batt
BATTERIES
battery
bay fireplace
bay window
beam
bellows
bench vise
bermed earth-sheltered home
binary cycle geothermal plant
biodiesel
biodiversity
bioenergy
BIOENERGY AND BIOFUEL
biogas
biogasification
biomass
bituminous coal
blackbody
blades
blanket insulation
blocking diode
block-type thermal power station (BTTP)
blower door test
blowtorch
boiler
boiler rating
BOILERS
bolts and screws
boron
bow saw
box stove
bread
bread box system
briefcase solar panels
brick
bricklayer's hammer
broad axe
buffer storage
BUILDING AND ARCHITECTURE
building envelope
building materials
building-integrated PV
bulb turbine
bypass diode