The basis of heat pump technology is something that we are all familiar with as it is the same as that used in refrigerators or air conditioning units. The core function of these units is to take heat from the ground and transfer it to a building for the purpose of heating water. This heated water is commonly used for space heating but can additionally be used as the basis for all hot water provision in the building given an additional boost from a complementary boiler system.

Heat pumps consume energy in the form of the electricity used to power the pump; this is a relatively efficient use of energy producing between two and four units of heat for each unit of electricity consumed. The system is at it most efficient when used to run an underfloor heating system.

Heat is gathered from a ground loop; this is constructed from lengths of pipe in a closed loop and filled with a blend of water and antifreeze. This liquid is pumped through the pipework loop and absorbs heat from the surrounding ground. The ground loop is either buried in trenches to the depth of around a meter or sunk into a borehole. The borehole option requires less ground area, but is more expensive to excavate and install than a trench.

The pumped liquid bears its absorbed heat to the heat pump where the evaporator takes the heat from the liquid and the compressor circulates the gaseous refrigerant and compresses it to the desired temperature. The condenser then transfers the heat to a hot water tank from which the heat distribution system is fed. In turn, the heat distribution system heats space through under-floor piping or wall mounted radiators.

At the time of writing; from a cost perspective this method of heating is cheaper than all options except mains gas. The high cost of electricity from solar photovoltaic (PV) cells means that supplying the electricy needs of the system from that source is not currently cost effective and off-peak electricity provisioning should be considered.

For the coldest times of the year it is appropriate to consider an additional secondary source of heating such as a multi-fuel or wood burner that should be fuelled from sustainable sources.

A heating system based around this technology is a cornerstone of a healthy house design, providing a lower air temperature, surface heating, healthy heating solution.

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Here we concern ourselves with the volume of space we live in and through consideration of proportion aim to create harmony and reason within that space.

Architectural practice since ancient times has constrained itself by the use of proportional systems that guide the selection of forms for inclusion within a building. Systems of proportion are often relatively straight-forward based on mathematical ratios or geometric shapes. These concepts when applied beyond the sphere of architecture, to music, art & cosmology lead to sacred geometry and other related belief systems – we will constrain ourselves here to consideration of proportions in architecture. One such system of proportion is the golden ratio. Two quantities fall within the golden ratio if the ratio between the sum of the two quantities and the larger one is the same as the ratio between the larger quantity and the smaller one.

The golden ratio is 1.618033… and is also known as Phi and can be used to form the Golden Rectangle.

Beyond such esoteric considerations, the question of what size is the right size for your home arises. The answer to this question can be found through consideration of factors such as the number of inhabitants and the stages of life they are at, their entertainment needs, lifestyle and health & mobility requirements. Our options will be constrained by financial restrictions and building and planning regulations. This is a complex and dynamic web of factors each of which is of varying weight and priority in each individual situation and each of which must be considered to derive an optimal solution.

Very often we buy or build the largest home we can afford ignoring considerations of good design and fitness for purpose. As we seek increasingly healthy, green solutions to our housing requirements so good design becomes of increasingly significance.

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Whilst a superficial consideration of modern house design often may lead to the conclusion that external sound is simply something to be shut out, minimised and in a perfect world eradicated, in reality this is a more complex design consideration. Sound can tie us to our surroundings, sooth us or excite us, an absence of sound can be as unsettling as a surfeit of it. There is a balance that we must strike.

The soothing sounds of rain-fall or bird song are of now value if drowned out by the constant hum of a nearby motorway or over-flying aircraft.

The major sources of sound pollution are road traffic, aircraft and industrial noise. Where sound is elevated above acceptable levels (and what is acceptable varies by individuals) then stress, increased accident rates, and higher levels of aggressive and anti-social behaviour are the consequences.

How can we reduce sound pollution?
There are two main ways to reduce sound pollution: mass of material and effective insulation. Simply put thick walls and floor will dampen sound and reduce the levels of pollution whilst modern technology brings us soundproofing and sound insulation products from which to construct walls and floors. Double and triple glazing is effective in reducing not only the egress of heat, but also the ingress of unwanted sound.

But let’s not forget the positive aspects of noise. Music provides a person with a happy euphoria. Natural sounds such as those of running water and wind in trees have been demonstrated to improve mood and enhance relationships.

The balance between positive and negative aspects of the total noise picture within, and especially around a building must be correctly struck to maximise any positive influences whilst minimising noise pollution.

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Moulds are a type of fungi, the group of very common organisms that includes mushrooms and yeasts. Moulds are most likely to grow in wet or damp conditions. In the home, places at threat from mould growth include wall, ceiling and floor coverings, insulation material and wooden constructions that have become dampened by water ingress. […]

A rainbow rose over the pipeline today!
I must admit I loathe the thing. It’s a great example of the way that big corporate culture rules this country and steam-rollers everything in its way, be that our heritage (Roman road found at gas pipeline) or our opinions (Final pipeline protester removed).

It is also an example of […]

I was recently wandering around the web rooting through building and design related sites and came across a reference to John Ruskin’s Seven Lamps of Architecture intrigued by the title, I decided to do some more digging and came across one of the foundations of architecture over the last 150 years.
I’ve not yet read the […]

At the heart of our lighting design we should place the central concept of the relationship between day and night, light and dark that lies within our most natural rhythms.
This is a complex discipline in that the direction of the sun at given times of the day & the year, the orientation of a building, […]

One end of the heating — cooling continuum, heating is one of the hottest (sorry about the pun!) topics when it comes to healthy and green building.
The optimum temperature within our healthy home, lies somewhere between 15 & 25 Degrees Celsius. The exact temperature will vary dependant upon a number of variables. These variables include […]

Having fed my lime pointing addiction over the last few weeks, my overall approach is established:

To begin with the lime mortar is generally sound, if crumbly in places and needing some attention.

After hacking back there are some deep areas needing extensive filling and other areas that remain mainly intact.

Pointing is done using a 3:1 local […]

Our comfort zone, in terms of the optimum temperature within our healthy home, lies somewhere between 15 & 25 Degrees Celsius. The exact temperature will vary dependant upon a number of variables, which include surface temperatures, moisture in the air, movement of the air and the nature of any heat emitted in the environment.
To maintain […]