Alslo

Thanks for all your help. I will get a chance this evening to have another go.

Morning. I'm having a problem finding the u value of the average diameter of my logs. From what I have looked at on the net, most are US sites so are valued in inches, that's no problem converting into metric. They are saying U value for softwood is 1" =0.64, my log diameter average is 15". So 15 x 0.64=9.6. Now I believe for the calculator I need to change this figure into W/m2.k? If so this is a conversion according to google of multiply by 5.678 = 54.5088. This figure doesn't look similar to the one in the spreadsheet. ???

Hi, I have been looking through the spreadsheet entering our data. There are a few areas I had to leave as they where as I pretty much don't get it, sorry! When you come to the end I was expecting a enter button. What am I doing wrong?

Thanks Jeremy. Infact I was just checking our weather here. I was surprised for such a small country, we are discribed as having four climates. We are in the south west and so we are classed as being oceanic. Looking at the data shows average summers 26 degress, winter is zero but during our experience here it's getting warmer and shorter. I will have a look at your spreadsheet. Please dont be surprised when I get back to you for advice. As I said earlier there's not to much upstairs. Thanks Al.

Thanks for your help guys. I will check out the local weather data. I will also look at the chart although my brains are in my hands and not upstairs. Cheers.

Cheers steamy tea. Hopefully Mr JH will see my post. From what I see on here, he knows his stuff as do a lot of you guys. Thanks for your time.

Hi I would be grateful for your thoughts and expertise regarding correctly sizing the air to water heat pump for our new self build home. I have inputted our spec into a few companies own calculators that came back with different results. I fully expected this as our house didn't really fit into the criteria being asked for on there calculators. I will give you all the details I can think of. The floor area is 170 square metres. Its one and a half storey. Wall construction is Canadian log style pine timber with sheeps wool and rubber seal joints. The diameter of the logs is between 40 cms and 70cms. 30 cm sub floor with DPC membrane, followed by 5 cm high density kingspan insulation foil backed, underfloor heating in 10 cms screed/stone mix finished polished. Triple glazed windows and doors. Roof construction consists of 2cm timber finish board, followed by breathable membrane with 10cm high density Kingspan insulation foil backed,then 5 cm air pocket followed by breathable membrane followed by 5cm air pocket finished with fired tile. Downstairs the house is open plan with a central fireplace housing two flues for a solid fuel stove and a solid fuel range cooker. One will be lit most of the winter cold days. There are four rads upstairs. Plumbing will be two showers and one bath. Two bedroom with two inhabitants. The house location is Slovenia where the average ambient temperature during the winter is between 3 and 5 degrees below the UK if this helps? I look forward to your help. Regards Al.