John1001

Thanks JohnMo > You need your volume of the house in m3 House Vol. is 244m3 > divide that by 2 to 3 to get your overall flow rate in m3/hr 244m2 / 2.5 = 97.6m3/hr Is that the minimum flow rate or the target flow rate? The calculations have the actual flow rate at 138.6m3/h Bedroom(double) 11 l/s Bedroom(double) 11 l/s Bedroom(single) 5.5 l/s Living room 11 l/s = 38.5l/s / 3.6 = 138.6m3/h So 97.6m3/hr is the flow rate based on the size of the house (from what you said "You need your volume of the house in m3 divide that by 2 to 3 to get your overall flow rate in m3/hr.") And 138.6m3/h is the required flow rate based on the regulations Does it matter that these are so different. I assume I want to be hitting the regulation flow rate either way EDIT Actually if I divide by 2 instead of 2.5 it is 122 m3/hr, much closer to 138.6m3/h. But what's the meaning behind that number "2 to 3" that I divided by?

Hi, I'm going to give self designing/installing a vent-axia kinetic unit myself a go. My house is a bungalow and fairly small so I figured the air flow calculations were easy enough to do: 1 Kitchen/diner (53m3) 13 l/s 1 Bathroom 8 l/s 1 Utility 8 l/s ------------ Extract 29 l/s Bedroom(double) 11 l/s Bedroom(double) 11 l/s Bedroom(single) 5.5 l/s Living room 4.8 l/s (based on room size) ------------ Supply 32.3 l/s I see everyone's supply and extract calculations from BPC etc on the forum match up exactly. What room's supply or extract do I adjust to get these to match? Thanks