21Degrees

“The windows are lovely. I’m really pleased with them. It was really positive working with 21° throughout the retrofit. 21°’s aftersales team has also been great and has popped in twice to address some minor snagging issues.”

“I was aware of 21°s window ranges through my work at Carbon Coop, so I had already worked with the 21° team. I looked at a few alternative companies but 21°'s quoting turn-around time reassured me by being more timely and efficient. I’ve always found Paul and Luke to be incredibly helpful.”

“Having already experienced the comfort and performance of Green Building Store’s windows and doors in my own home, it was an easy and simple decision to opt for them for the veterinary practice. I have been very pleased with how the windows and doors are performing and I appreciate their role in helping us to meet Passivhaus requirements.”

“21° has a great reputation of providing MVHR for Passivhaus and low energy projects. They have supplied the MVHR in my own house and I knew that they create inaudible and highly efficient MVHR systems, so I chose them again for this project.”

“We have really enjoyed working with 21° on our self-build project. Throughout the challenges of the pandemic, the team has worked really hard to ensure good customer service and respond to our many questions. It was really helpful to be able to get the windows and doors and MVHR system from the same place. It also helps that 21° really understands Passivhaus requirements and can offer good technical support for projects like ours.”

“The MVHR system is working very smoothly – so smoothly that we often forget it is there. The effect is in the house is constantly refreshed pre-warmed air, with the system running along quietly in the background.”

“It was really helpful to have a mix of window and door ranges from 21° to choose from. This flexibility helped with our budgeting and also the aesthetic requirements of our design. The contemporary ‘frameless’ design of the PROGRESSION range complements perfectly our minimalist corrugated cladding aesthetic. As well as looking great, 21°’s windows and doors offer excellent thermal and airtightness performance, which was obviously very important for us in working towards a Passivhaus selfbuild”

“The windows and doors are fantastic. They look really good and everyone comments on them. I chose Green Building Store windows and doors because I wanted timber to fit in with the rest of the house and I liked the fact they were triple glazed. Local joiners offering triple glazing did not offer the same specification or design and were effectively just extending the rebate of double glazed windows. The airtight seals and 10 year guarantee offered by Green Building Store were also important factors.”

“Compacfoam is ideally suited for this issue. 21°s design team helped create a detail which resolved any cold bridging issues along the door openings.”

“The ULTRA range was the obvious choice for us. The U-values were in line with our needs and plans for Passivhaus certification. The support from 21 Degrees was always first rate.”

“We felt that building the offices to Passivhaus standards would exemplify the work that we do. There were other major benefits including being cheap to run, comfortable and healthy for workers.”

“We chose 21 Degrees GBS98 windows because of the thermal performance. The aluminium-clad frames added aesthetic value and worked well with both the zinc and rendered wall finishes. We had great support from 21 Degrees during the detailed design stage.”

“The PERFORMANCE windows and doors are great and are of a high quality. We’re really pleased with them. The glazing bars and frames look slender and suit the building well.”

“Since the windows have been installed, we have had a lot of positive comments. Even when it is windy outside the weather definitely stays outside and it is an ocean of calm inside. People working on the house have noticed how warm it is inside and the contribution the windows are making to that. We’re very happy with the windows and are pleased with how they look.”

“We originally came to an Open Day and talks at 21°s Huddersfield base. We chose the Performance range because of the care that went into the design of the windows and the attention to detail to maximise their efficiency. We also liked the fact that there was a lot of flexibility in the design of the windows. Everyone at 21° was very helpful during the process.”

“We have specified 21° windows on various traditional and contemporary, refurbishment and newbuild projects over the past 10 years, and all our clients have been very pleased with them. We particularly like the green credentials, as well as the exceptional performance and quality, and the clean, simple aesthetics.”

“Our architect Dennis Hooley recommended the windows initially. We were keen to avoid PVC and wanted timber windows more in keeping with the property. We obviously wanted triple glazing to fit in with the project’s energy efficiency goals. We love the windows and doors! I can’t tell you how many comments we’ve had about them from neighbours and passers-by. The house was pretty cold before so we’ve been feeling a lot warmer since the retrofit.”

“I am very pleased with the PERFORMANCE triple glazed oak windows and doors – it is a quality product. They fit in well with the traditional design of the house, are very efficient and offer a great compromise of form and function. The house maintains a steady temperature of 21 degrees throughout and the windows and doors are really contributing to this.”

“The Compacfoam was used to reduce thermal bridging at the thresholds and works well in that situation.”

“When we were researching Passivhaus suitable window components, we came across Green Building Store’s PERFORMANCE range which offered the high performance that we needed, combined with affordability. We put them out to tender with our contractors against a competitor’s range and the PERFORMANCE range came out on top... We have been happy with the PERFORMANCE windows and doors – they look good and we are pleased with the finish. We would consider specifying the product again if it continues to offer a competitive advantage of price and performance.”

“The ULTRA doors complemented the PROGRESSION windows well , as well as helping keep budget costs down.””

“The PROGRESSION windows also worked well for the large uninterrupted picture windows that we wanted for the project. We have already specified PROGRESSION on another project we are working on.”

“We chose  PROGRESSION for the quality of the window and the narrow sightlines which maximises the glazed area. The insulated frames and increased glazing area meant that they perform well thermally. Visually they’re great –I love the fact the frames are almost invisible...”

“I was very impressed with 21 Degrees, and the fitting of the doors and windows, and the amount of care and attention that went into making them airtight. I would definitely recommend it to anyone building a passive house.”

“The MVHR system is working well and as we’d hoped. It is very quiet – you hardly notice it – which is especially important as the plant room is next to the bedroom. I have found 21° to be a good, reliable supplier of high quality well-designed MVHR systems.”