Posts Tagged ‘HVAC’

July 11, 2016

Gas boilers, air heat pump, underfloor heating, ground source, wood stoves, and more systems to use for heating a passive house!

Gas boilers are the default heat source in the UK and can easily be used in a Passivhaus. Combi boilers provide hot water on demand, and as such have high kW output so tend to need additional radiator capacity to buffer this. System boilers work with a hot water cylinder, so the boiler will generally […]...

AUTHOR: Petra Vladykova Bednarova

July 7, 2016

No secret when using a heating system in a passive house!

Air heating is the defi ning method for Passivhaus, in theory minimising costs. In practice there are a lot of reasons for not using air heating: A particular room’s demand…...

AUTHOR: Petra Vladykova Bednarova

July 6, 2016

Individual performance of HVAC components versus overall HVAC system performance! Both needs to be certified!

Inspections and audits are performed to different levels in different countries, for example low-cost/ low results in some Member States (MS), more costly and thorough in others (for example in…...

AUTHOR: Petra Vladykova Bednarova

July 5, 2016

Heating load when designig an HVAC system for a passive house!

PHPP works out an overall heat load, in terms of watts and W/m2. This gives a continuous heat load – ie, assuming the heating is on 24/7, and is aimed…...

AUTHOR: Petra Vladykova Bednarova

June 30, 2016

Heating via the fresh air supply in a passive house!

A Passivhaus building can in theory be heated via the fresh air supply – that is after it is heated to around 50°C. This idea of doing away with a…...

AUTHOR: Petra Vladykova Bednarova

June 27, 2016

Don´t just stick the ventilaiton unit in the loft and other DON´Ts for technical systems in passive house!

Don´ts for technical systems for a passive house: just stick the ventilation unit in the loft omit silencers accept shoddy ductwork installation. Excerpt from “How to build a Passivhaus: Rules…...

AUTHOR: Petra Vladykova Bednarova

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June 2, 2016

Handing over, primary maintanence, commissioning, changing filters and checkups of HVAC system in a passive house!

Hand over the system with a description of the system, demonstration of how to operate the controls and how to change filters. Also provide information on where to get replacement…...

AUTHOR: Petra Vladykova Bednarova

May 26, 2016

Guidelines for designing a chilled beam system!

While every project is unique, here are some guidelines: the zone sensible cooling load is between 20 to 40 Btu/ft² average for building; the primary airflow rate should be 0.25…...

AUTHOR: Hugh Crowther

May 25, 2016

Installation, commissioning and maintenance in HVAC system in a passive house!

Always use a fully designed ductwork system – for domestic ventilation this would usually be done by the system supplier, however they may charge for this. Use the ductwork and…...

AUTHOR: Petra Vladykova Bednarova

May 24, 2016

Presentation from the workshop on “Understanding HVAC Operational Performance” at the CLIMA 2016 added!

On 23rd of May, 2016, Swegon Air Academy held the workshop on “Understanding HVAC Operational Performance” at 12th REHVA World Congress Clima 2016 in Aalborg in Denmark! You can find the…...

AUTHOR: Petra Vladykova Bednarova

May 18, 2016

Setting up primary airflow, latent and sensible loads in offices, classrooms and healthcare!

The building type will determine which of three requirements will set the primary airflow. Offices and classrooms are driven by latent load, healthcare by ventilation, and hospitality by sensible loads.…...

AUTHOR: Hugh Crowther