Alastair Howard

5 Questions 4 Answers 0 Followers

Questions related from Alastair Howard

What is the lowest reasonable measure of indoor CO2?

I have around 50 monitoring devices measuring CO2 in different buildings across England. Occasionally the hourly average readings fall below 400ppm. I know there will be drift/ calibration errors...

12 December 2022 9,572 3 View

Is the running mean temperature invariably significantly lower than daily average outdoor temperature?

I'm working on adaptive thermal comfort (CIBSE TM52 / TM59). Calculating the running mean temperature using the formula Trm= 0.2Te(d-1) + 0.16Te(d-2) + 0.128Te(d-3) ... is giving me values for Trm...

01 September 2022 1,533 2 View

When conducting a thermographic survey, should you have a fixed temperature range for all images or let the camera automatically set the scale?

I'm looking at conducting a thermographic survey of a building to identify thermal bridging etc. There seem to be two options when taking a series of thermal images. The first is to let the camera...

11 February 2022 6,306 6 View

How much CO2 does an average person emit by breathing?

I've found various figures quoted on websites, but really need a peer-reviewed source that I can quote! I appreciate that the answer will be dependent on the size of person, how active they are...

02 November 2021 4,818 4 View

What is the minimum sample size for building performance evaluation on a development of houses?

When conducting building performance evaluation for a development of dwellings, is there a formula for calculating the minimum sample size? For example, rather than conducting full evaluation on...

20 April 2021 6,984 3 View