If You Were Plumbing, How Much Beer Would You Hold?
You open the hot-water tap. Then you wait for the hot water to flow. How long? (Too long, according to most people, I say.) The time depends on flow rate, the amount of water in ...
You open the hot-water tap. Then you wait for the hot water to flow. How long? (Too long, according to most people, I say.) The time depends on flow rate, the amount of water in ... [continue reading]
Water heating in residential buildings has become more important as the overall efficiency of buildings has improved over the last decade, with energy efficiency code requirements for A/C, lighting, and the building envelope. Modest ... [continue reading]
Heat pump water heaters are seeing increasing use in homes. They go well with solar PV and so support strategic electrification to reduce carbon emissions. And they are more efficient than electric-resistance water heaters. Several ... [continue reading]
Parts of the House That Stay On [continue reading]
There are a number of ways to combine PEX tubing with manifolds to get better-than-normal hot-water delivery in a home. In the old days, manifolds were sometimes used with soft copper tubing, but as copper ... [continue reading]
Measured Performance of Ducted and Space-Coupled Heat Pump Water Heaters in a Cooling-Dominated Climate
The Building America Partnership for Improved Residential Construction, led by the Florida Solar Energy Center, investigated the effect of ducted and interior-located heat pump water heaters (HPWHs) on space-conditioning energy use and water-heating energy use ... [continue reading]
When I started working in the home energy field (in the mid-1990s), I never imagined I’d be suggesting that all-electric homes could be among the most efficient, sustainable, and practical choices in ... [continue reading]
To save money on a building’s energy costs, window replacement may not be a smart move, according to ...
DOE’s Home Energy Score™ is a tool for homeowners, homebuyers, and renters that estimates home energy use, ...