Related by context. Frequent words. (Click for all words.) 63 wood burners 60 unvented 60 evaporative coolers 59 biomass boilers 57 fireplace inserts 57 wood stoves 57 fireplace insert 57 noncombustible 57 drying racks 57 boilers 57 hydronic 56 compact fluorescent lighting 56 thermostatically controlled 56 electrically heated 56 woodburning 56 woodstoves 56 radiant heating 55 patio heaters 55 wood boilers 55 outdoor fireplaces 55 furnaces 54 flow plumbing fixtures 54 wood burning stoves 54 cook stoves 53 condensing boiler 53 roof overhangs 53 vent hood 53 low flow showerheads 53 metal halide 52 cork flooring 52 firepits 52 water heaters 51 kerosene stoves 51 bathrooms kitchens 51 florescent light 51 biomass boiler 51 citronella candles 51 photovoltaic PV panels 51 pellet stoves 51 Carbon monoxide detectors 51 barbeque grills 51 heaters 51 stovetops 51 wind turbines solar panels 51 stoves 50 halogen lights 50 downlight 50 Thermostats 50 economizers 50 air conditioners refrigerators 50 fluorocarbons 50 flow showerhead 50 rainwater catchment 50 charcoal grills 50 operable windows 50 drought tolerant landscaping 50 heating 50 fluorescent lamp 50 fluorescent fixtures 50 Fireplaces 50 reciprocating engines 50 halogen lighting 50 Granite countertops 50 refrigerators dishwashers 50 Compact fluorescent light 49 swamp coolers 49 R#a 49 microturbines 49 cooking stoves 49 tumble dryers 49 High Intensity Discharge 49 nonflammable 49 programmable thermostats 49 economizer 49 solar paneling 49 dehumidifying 49 clothes dryers 49 solar panels wind turbines 49 biomass fuels 49 ceramic tile flooring 49 fireplaces 49 deep fat fryers 49 oxidizers 49 halogen bulbs 49 photovoltaic arrays 49 fridges freezers 49 Air Conditioning HVAC 48 downlights 48 drying rack 48 radiant heat 48 steam boiler 48 pellet stove 48 evaporative 48 woodstove 48 heating air conditioning 48 double pane windows 48 compact fluorescent lamp 48 Humidifiers 48 dryer vents 48 compact fluorescent lights 48 UL Listed