More Hot Water

Just found a whole bunch of UK studies of hot water – Yay! Here’s one on the cost-benefit of installing thermostatic mixing valves: “It is very likely that installing TMVs as standard in social housing in new buildings and major refurbishments accompanied by educational information represents value for money.”  Here’s a powerpoint from the American Burn Association discussing scald prevention: […]

Hot Water

Here’s some stuff we probably should have been offering years ago in conjunction with hot water heater replacement. Thermostatic Mixing Valve These are installed at the hot water supply line as it leaves the tank. Good idea for a few reasons: We can greatly reduce the potential for scalding people in buildings. Sort of a big deal for making things […]

Insulated Attic Storage

Storing stuff in unconditioned attics isn’t a great idea. Typically attic storage requires access to the unconditioned space via a big hole – usually attic stairs – which are hard to make air-tight or insulate well. Things that are stored in unconditioned attics don’t fare very well. Attics have really big temperature and humidity swings, which is bad for almost […]

Duct Performance

Part of the problem with ducts is related to language. In English, the word ‘always’ and the word ‘never’ sound very similar. Pictured here is the attic duct system on a very inefficient and uncomfortable house. How often should you tap multiple supply ducts into the very end of a supply trunk? Probably nalways.

Category Construction, News

Blower Door Guided Air-sealing isn’t Real

I really like blower doors.There are a lot of building diagnostic tools that most people have probably never heard of that I like. Duct-blasters and flow plates to name a couple of more. For readers who are interested in conserving energy who haven’t heard of a blower door, check out Martin Holladay’s article on blower doors here. Blower doors are […]

3D modelling an addition

The owner finds this room uncomfortably warm in the summer, uncomfortably cool in the winter, and generally uninspiring year round. It is an important room as it is open to the kitchen, the busiest place in their home. To get a real feel for the existing conditions, I import photos into Sketchup and create and ‘Existing Conditions’ model. Then I […]