Exeter Chiefs ran in five tries as they comfortably beat London Welsh, who suffered their sixth successive Premiership defeat.
Gareth Steenson and Gavin Henson traded penalties but a converted Jack Yeandle try, on his first league start, gave the home side a 19-9 lead at half-time.
Chiefs ran in four further tries in the second half, all of which were converted by the flawless Steenson.
Canada international Phil Mackenzie replied for the Exiles.
Welsh lost Neil Briggs to an arm injury just before the half-hour mark and Yeandle scored the opening try of the game after the forwards drove over from a line-out.
Pressure from the home side soon after the break paid off when open-side flanker James Scaysbrook's long overhead pass found skipper Tom Hayes, who squeezed in at the corner.
The Chiefs were pegged back when Mackenzie darted over and Henson's conversion brought the Exiles back to within 10 points.
But Exeter extended their lead through Damian Welsh and then full-back Luke Arscott fed outside centre Sireli Naqelevuki, who stretched for the line.
Exeter's defence had to stand firm in the closing quarter of an hour but winger Jack Nowell raced in from 35 metres to score their fifth try and secure the victory.
The bonus-point win puts Exeter one point behind seventh-placed Bath while Welsh are three points above bottom club Sale.
VIEWS FROM THE DRESSING ROOM
Exeter head coach Rob Baxter told BBC Radio Devon:
"We were nervous but it showed it meant something to us. As the game wore on and we were able to take control of the breakdown, we looked like a good side.
"We got the ball to the right areas a lot better today than we have been able to in the past.
"It's not like everything in the garden is rosy, It's an important win for us but there's still a hurtful loss at Sale that rankles me and those things don't disappear.
"What we have to remember is the way we train and play from now on has to make sure we keep addressing issues every week and we keep focusing hard on getting better."
London Welsh head coach Lyn Jones:
"I feel like apologising to the crowd because they came along for a contest and we really didn't compete.
"I don't know if Exeter were really that good or we were that bad, it may be a mixture of both. It was probably our worst performance of the season and everything that we did turned to dirt really.
"But we weren't good enough and the Exeter defence was tight and well disciplined unlike ours. We have to go away and take a look at what we are doing to make sure that what we are doing is the right thing.
"We are not going to panic but today was a backward step."
Brown for Tui (41), Welch for Mumm (44), Dollman for Naqelevuki (59), Mieres for Shoemark (61), Clark for Yeandle (63), Moon for Rimmer (63), Ewers for White (63), Chudley for Thomas (70).
Arscott; Mackenzie, Tiesi, Jewell, Scott; Henson, Keats; Montanella, Briggs, Bateman; Jonathan Mills (capt), Corker; Balding, Cabello, Jackson.
Tideswell for Briggs (28), Hills for Cabello (52), Bristow for Montanella (58), Purdy for Jackson (58), Lewis for Keats (58), Parker for Jewell (61).
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